hmmwv
While on a supply run, another HMMWV in your convoy is disabled due to an engine problem. Your vehicle has a tow bar and safety chains, and you are given the task of towing the vehicle back to base. Where on your vehicle do you connect the tow bar?
Pintle
Dashboard Switches and Lights Light Switch Operation - Practice
Practice using the light switch control levers to turn on various external lights. The result of your action will be displayed in the HMMWV illustrations. (When you raise the unlock lever, it will remain in the raised position until you move one of the other levers.) Practice turning the following lights on/off: -Blackout marker lights with and without blackout headlight -Instrument panel lights -Headlights -Parking lights without headlights
When starting the HMMWV, to what position do you turn the ignition switch to first?
Run
While driving, you notice the oil pressure is 5 psi. What should you do?
Shut down the engine immediately
Engine Compartment Power Steering Reservoir
The power steering reservoir is located on the driver's side of the engine compartment. There are two types of power steering reservoirs: Power steering reservoir with a sight glass Power steering reservoir with a dipstick
While driving, you notice the brake warning lamp is on. What may this indicate?
The parking brake is applied
what component of the automatic fire extinguishing system detects smoke or hear
multi sensors
Where is the fire extinguisher usually stowed?
on the side of the driver's seat
What feature of the operator's manual provides an outline of the document to help you locate the information you need?
Table of contents
Which vehicle exterior component provides access to the vehicle cargo and troop area?
Tailgate
Dashboard Switches and Lights AFES Control Module
The Automatic Fire Extinguishing System (AFES) has sensors that detect fire inside the vehicle and release an extinguishing agent automatically. There is also a manual control that can be used to discharge the fire extinguishing agent. The AFES control module is located next to the dashboard on the driver's side of the radio rack. When the ignition switch is on, the OK lamp on the panel shines green to indicate the system is ready for automatic operation. To manually activate the extinguisher, lift the safety guard and flip the toggle switch. The AFES system is only applicable to the up-armored vehicles M1114, M1151A1, M1152A1, and M1165A1.
B1/B2/B3 armor kits
The B1/B2/B3 armor kits are add-on armor specifically designed for the A1 variants. The kits include: -B1 kit - add-on armor for the M1151A1 -B2 kit - add-on armor for the M1152A1 -B3 kit - add-on armor for the MK1165A1
Frag 5 armor kit
The Frag 5 armor kit includes heavily armored doors with ballistic resistant windows, plus some additional armor protection. The Frag 5 door is heavy - some weigh hundreds of pounds. You must be careful when opening or closing the door to avoid injury. The ballistic glass window can be partially opened for cabin ventilation, or to equalize pressure during deep fording. A combat lock provides additional door security when vehicle is occupied.
Vehicle Systems Weapon Station
The M1114 and the M1151 ECVs are equipped with a weapon station.
Basic Issue Items MAX Tool Kit
The MAX tool kit is a multipurpose hand-tool kit that includes a carrying case to hold all of the items. The kit is commonly stowed in the cargo area or on the tunnel.
Marine Armor Kit (MAK)
The Marine Armor Kit (MAK) provides armor protection for the M1123. The MAK includes armored doors, backplate, roof, and undercarriage protection. MAK installation also includes upgrades to suspension and air conditioning.
Characteristics and Capabilities Water Crossing
The Marine Corps HMMWV can ford a hard-bottom water crossing of up to 30 inches without a deep-water fording kit. Vehicles with the deep-water fording kit can ford water (with hard bottom) up to 60 inches deep. The deep-water fording kit is optional equipment that may be installed on most Marine Corps HMMWVs. One exception is the M1114, which is limited to a 30-inch fording depth.
Table of Contents
The Table of Contents (TOC) provides an outline of the document, enabling you to locate the information you need.
Warning summary
The Warning Summary is a collection of specific warnings that apply to vehicle operation. These warnings are for your protection. Failure to comply with these warnings may result in injury or death.
Dashboard Switches and Lights Hand and Foot Throttles
The accelerator pedal, or foot throttle, is used to control engine speed for normal driving. For specific situations such as winch operation or fording, a hand throttle can be used to set and hold engine speed. To use the hand throttle, pull it out until the engine reaches the desired speed. Then, twist the throttle to lock it in position Note: Never use the hand throttle as an automatic speed or cruise control. Improper use increases stopping distance and the likelihood of an accident.
Engine compartment air leaner
The air cleaner is located at the right rear of the engine. The canister houses the air cleaner element that filters dirt and dust from the air entering the engine. Servicing the air cleaner is normally not the operator's responsibility. However, in an emergency, you may need to service the air cleaner in order to complete a mission. You will learn how the air cleaner is serviced in a later lesson.
Dashboard Switches and Lights Air Restriction Gauge
The air restriction gauge is to the right of the rotary switch on the dashboard. This gauge provides the operator with a visual indication of airflow through the engine's air filter. If there is a restriction such as a dirty filter, the indicator will move toward the red area of the gauge. note: If the yellow cylinder reaches the red zone while you are driving, park the vehicle, stop the engine, and refer to the operator's manual for emergency air cleaner servicing.
Engine Compartment Power Steering Pump
The power steering pump is located on the left side of the engine, just below the alternator. The power steering pump provides pressurized fluid to operate the following: -Power steering -Power brakes -Radiator fan clutch -Hydraulic winch
Which of the following statements about starting the engine are correct?
The ignition switch is turned to START after the wait-to-start lamp goes out.
Instrument Cluster Instrument Panel Light Access
The instrument panel lights are controlled by the auxiliary lever on the light switch. Two access covers on the instrument panel enable replacement of the light bulbs for the instrument lights.
Basic Issue Items Jack and Associated Tools
The jack and tools bag holds the scissors jack and the tools used with the jack: -Scissors jack: is a hand-operated 3.5-ton jack. -Jack handle: attaches to the jack. It enables you to raise or lower the jack using the ratchet wrench. If required, you can connect the jack handle extension to lengthen the handle -Jack handle extension: to extend the jack handle when necessary. -Ratchet wrench: is used to raise or lower the jack. It attaches to the jack handle -Lug wrench: to loosen/tighten the lug nuts on the vehicle's wheels The jack and tools bag is usually stowed behind the driver's seat or in the cargo area.
Dashboard Switches and Lights Lever-Type Switch Controls
The lever-type light switch has three control levers to operate the instrument panel and exterior lights. The selector lever controls the exterior lights. The lever remains locked in the selected position until the unlock lever is raised. The auxiliary lever controls the instrument panel lights and the parking lights. It can be moved to a different position without using the unlock lever. 1. The auxiliary lever controls the parking and instrument panel lights. 2. The selector lever controls the exterior lights. 3. The unlock lever prevents the unintentional movement of the selector lever. It does not affect the movement of the auxiliary lever.
Dashboard Switches and Lights Light Switch
The light switch controls the operation of the service lights, blackout lights, and instrument panel lights. The service lights include: Headlights Parking lights Turn signals Brake lights The blackout lights include: Hooded headlight Blackout markers (front and rear) Blackout stop lights The light switch also controls illumination of the instrument panel gauges.
Maintenance Level
The maintenance level is identified by a set of letters or numbers in the document number. Under the Marine Corps Realignment of Maintenance (ROM), the letters OR, IN, and DE refer to the three levels of maintenance - ORganizational, INtermediate, and DEpot. For older manuals, the numbers 10, 20, 30, 40, and 50 are used to indicate the Echelon of Maintenance (EOM) to which the manual applies. The maintenance designators for your operator's manual will be "-OR" for the ECV manual or "-10" for the M1123 manual. The "OR" and the "10" denote that the manual is applicable to the vehicle operator Note: A combination of numbers is sometimes used to identify that a document applies to more than one maintenance level. For example, in the document number LI 10629-12, the "12" indicates that the manual includes both first and second echelon maintenance information.
Vehicle designation
The number following the document type is the vehicle designator, an identifier assigned to this particular type of vehicle. When a publication covers more than one model of the same equipment, specific models are listed on the cover, as in the case of the HMMWV operator's manual. If the manual only applies to a specific system or major component of the vehicle, a letter suffix is usually added.
Instrument Cluster Engine Oil Pressure Gauge
The oil pressure gauge indicates oil pressure in pounds per square inch (psi) when the engine is running. Sufficient oil pressure is critical for the engine to operate properly. The table below lists normal readings. CAUTION: -Operation with low oil pressure will cause engine damage. -If oil pressure drops below 10 psi, shut down the engine immediately. Vehicle: ECV - M1114/M1151/M1152/M1165 Engine at Idle: 20psi Engine at Cruising Speed: 30 to 50psi Vehicle: M1123 engine at Idle: 10 psi Engine at Cruising Speed: 30 to 50 psi
Operator's Manual Technical Manuals
The operator's manual is a standard Marine Corps technical manual (TM). TMs generally contain instructions for the installation, operation, maintenance, and/or support of equipment. The TMs that apply to you as a HMMWV operator are: -TM 11033-OR for the ECV (M1114/M1151/M1152/M1165) -TM 2320-10/6B for the M1123 and similar vehicles The applicable HMMWV models are listed on the cover of each TM.
Operator's Manual Introduction
The operator's manual provides the information and procedures you will need to operate your vehicle. The information in your operator's manual tells you: -How to operate vehicle controls -How to interpret dashboard indicators -Procedures for checking and servicing your vehicle How to recognize, troubleshoot, and correct basic malfunctions The operator's manual is part of the basic issue items (BII). You will receive a copy of the manual every time you are assigned as the operator of a vehicle.
Dashboard Switches and Lights Vehicle Operator's Manual
The operators manual for the M1123 covers several older vehicle models. The ECV operator's manual, TM 11033-OR applies to all of the ECV models described in this course.
what lights are controlled by the auxiliary lever on the light switch
instrument panel lights
M997A2, M1035A2 ambulances and M1045A2 Tow missile carriers are also referred as
"A2" series
Which of the foolwing HMMWV variants are pre-ECV models?
-M997A2 and M1035A2 ambulances -M1123 troop/cargo carrier -M1045A2 TOW missile carrier
Armored HMMWVs have one or more of the following types of armor protection:
-Permanent armor (M1114) -Marine Armor Kit (MAK) -Integrated Armor Protection (IAP) -B1/B2/B3 armor kits -Frag 5 armor kit
The HMMWV is designed with specific performance capabilities:
-Road grade -Side slope -Water crossing -Cruising range
Based on these instrument cluster indications, which statements are correct?
-Speedometer indicates the speed limit on most military installations. -Engine coolant is within the normal operating range.
Drivetrain Engine
-The HMMWV is powered by a V-8 diesel engine that drives the transmission as follows: -The ECV engine delivers 190 horsepower at 3,400 revolutions per minute (rpm). -The M1123 engine delivers 160 horsepower at 3,400 rpm. The primary difference between the two engines is the addition of a turbocharger in the ECV engine to provide additional horsepower.
Characteristics and Capabilities M1151/M1151A1
-The M1151 is an armament carrier that, similar to the M1114, is commonly used for surveillance and security operations. The M1151 is configured as a four-door vehicle. -A weapon station mounted in the cab roof can accommodate various crew-served weapons such as a machine gun or a grenade launcher. -The M1151A1 has Integrated Armor Protection (IAP) and is armor ready, meaning it is designed to accept additional armor. -The unarmored M1151 has a crew and cargo weight capacity of about 4,000 lb. The armored A1 capacity is reduced to 3,900 lb with underbody armor, or to 1,800 lb if perimeter armor is also installed. -Gross vehicle weight of the fully loaded M1151A1 with crew and cargo is 12,100 lb.
Drivetrain Transmission
-The transmission transmits engine power to the transfer case. A shift lever provides operator control of gear selections, which include park, reverse, neutral, and four forward speeds for different driving situations. -As an operator, you will periodically check the transmission's fluid level during Daily PMCS.
Windshield Washer Reservoir
-The windshield washer reservoir is located at the left rear of the engine compartment. -Keep the reservoir full of washer fluid
Three major systems for the HMMWVs are:
-Weapon station -Air conditioning -Automatic fire extinguishing system (AFES)
Which factors affect the cruising range of the HMMWVs?
-Weight of Cargo -Type of terrain -Weight of armor
Situation in which the hand throttle should be used. question What are some specific situations for which the hand throttle in M-Series vehicles would be used?
-cold weather staring -winch operation -Maximizing alternator output for communications and electrical requirements. -Deep water fording
Characteristics and Capabilities M1123 (armored and without armor)
-primarily used for troop transportation -can be configured with the Marine Armor Kit (MAK) -The unarmored vehicle accommodates eight troops on fold-down seats and may be fitted with a canvas top covering the troop/cargo area. -Of the five variants in this lesson, the M1123 is the older model, and is the only variant that does not have the strengthened ECV chassis. -Without armor, the vehicle has a cargo capacity of 4,400 lb, including crew. The armored model has a reduced cargo capacity of just 600-1,000 lb due to the 3,500-3,800 lb weight of the armor. With crew and cargo, the gross weight of the armored M1123 is about 10,300 lb.
which engine compartment component provides pressurized fluid to operate other engine components
power steering pump
Engine Compartment Raising the Hood
1. Apply the parking brake 2. release the hood latches 3. lift hood (Always maintain the proper lifting posture, legs bent with back straight. Failure to do so may cause damage to equipment or injury to personnel.) 4. verify the prop rod engages in the bracket (Ensure the hood prop rod properly engages the support bracket. Damage to equipment or injury to personnel may occur if the hood is not properly secured.)
Engine Compartment Lowering the Hood
1. Release the hood prop rod. (Always maintain the proper lifting posture, legs bent with back straight. Failure to do so may cause damage to equipment or injury to personnel) 2. Slowly lower the Hood (When releasing the hood prop rod, do not pull the rod at the hook end. Injury to fingers may occur.) 3. fasten the hood latches After closing the hood of the M1123, raise the brush guard.
while driving off-road you are preparing to descend a steep hill, what transmission gear should you use?
1st and 2nd
There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. What is the maximum road grade that your fully loaded ECV can climb?
22 degrees (40 percent)
What is the expected cruising range of your ECV HMMWV when driving on a hard surface road, over hilly terrain, at a nominal speed of 30 to 40 mph?
250 mi
What should the HMMWV oil pressure reading be at normal cruising speed?
30 to 50 psi
Additional Authorization List AAL Items
Additional Authorization List (AAL) items are contained in Appendix C of the operator's manual. A few examples of items that may be authorized for your vehicle include -A chock block is used along with the parking brake to keep the vehicle from rolling when parked on an incline -A flashlight may be included in the required AAL items. -The slave cable is used to jumper between two vehicles when attempting to start a vehicle with a dead battery -A five-gallon water can provides additional nonpotable (non-drinkable) water during a mission. -HMMWVs are equipped with a runflat device, so a spare tire is normally not needed. However, in some situations, vehicles may carry a spare as an added precaution.
What does the air restriction gauge on the dashboard measure?
Airflow through the engine's air filter
Applendices
Appendices provide supplemental information such as references, basic issue item (BII) lists, lubrication procedures, loading and stowage guides, vehicle sign/decal information, etc
Vehicle Systems Automatic Fire Extinguishing System
Armored vehicles have an installed automatic fire extinguishing system. The AFES has three main components: -Multiple sensors to detect smoke or heat -An extinguisher to release the fire-extinguishing agent -A master control module to monitor the sensors and automatically trigger the fire extinguisher when necessary. It also has a guarded switch to manually release the agent in an emergency or if the primary system fails. Power is provided to the AFES system when the ignition switch is turned on. The system is deactivated when the ignition switch is turned off.
Which of the following are features of the Frag 5 armored door?
Ballistic-resistant glass heavy armor plating combat locks
Basic Issue Items Introduction
Basic Issue Items (BII) are essential items used in vehicle operation and for emergencies. Prior to operating your vehicle, you will check that each required item is properly stowed in the vehicle.
Which part of the Technical Manual identifier denotes that the manual is appropriate for the vehicle operator
C
Chapters
Chapters contain vehicle information and procedures Chapter 1 - General information and vehicle description, including vehicle characteristics and capabilities Chapter 2 - Operating instructions, including description and operation of vehicle controls, checks and services performed by the operator, and instructions for operating under various conditions Chapter 3 - Maintenance information, including troubleshooting and emergency repair, lubrication information, and basic maintenance procedures
What is the primary use of the M1165?
Command and Control
while preparing for a mission, you learn that you will neeed to cross terrain with a grade of almost 50% (-27 degrees). while HMMWV variant is capable of climbing a grade that is this steep?
M1123
Dashboard Switches and Lights A/C and Heater Controls
Depending on the model, M-Series vehicles have different controls for air conditioning (A/C) and heater operation: M1151, M1152, and M1165 M1123 M1114
According to the BII table in the operator's manual, where is the fire extinguisher located?
Driver's seat area
Which HMMWV variant is the primary vehicle carrying the S250 electrical equipment shelter?
M1152
Basic Issue Items Fire Extinguisher
Each vehicle carries a manual fire extinguisher. It is usually mounted in a bracket between the door and the driver's seat for easy access. The fire extinguisher gauge must be in the green zone, approximately 150 psi, and the seal must not be broken
Drivetrain Half Shafts
Four half shafts transmit drive power from the differential to the wheel hub. Two of the half shafts connect to the front differential while the other two connect to the rear differential.
The Expanded Capacity Vehicle (ECV)
Four-Wheel-drive vehicles V8 diesel engine -turbocharged engine -upgraded suspension -improved air conditioning -fire suppression system -armor ready (additional armor kits can be install) -the armored vehicle has a weight of 12000 lb
Exterior Components Frag 5 Armored Door Operation
Frag 5 doors include a double-catch latching mechanism, which includes both the normal door latch and specially designed "combat" locks. The combat lock can be released by a lever from inside the vehicle. However, from the outside, a unique combat lock emergency release wrench is required. Use care when opening and closing Frag 5 doors. Do not rest fingers in the door opening. Injury to personnel may result. Ensure crew doors are locked during vehicle operation. Ballistic integrity cannot be maintained if crew doors are unlocked.
Dashboard Switches and Lights Steering Wheel Lock Cable
HMMWVs do not use an ignition key or lock like civilian vehicles use. Instead, they are equipped with a steering wheel lock cable, located below the dashboard. This cable enables you to lock the steering wheel with a padlock to prevent unauthorized use of the vehicle.
What is the normal transfer case range on hard road surfaces?
High (H)
What switch, when turned off, deactivates the automatic fire extinguishing system?
Ignition switch
Basic Issue Items Inventory and Stowage
In preparing your vehicle for operation, you will verify that all required BII is on hand and is correctly stowed. Equipment stowage diagrams for the different HMMWV variants are provided in the Operator's Manual, Appendix E, Stowage and Sign Guide. The operator's manual lists the stowage location for each item. Note: Your unit's policy may be to issue a set of BII when you check out a vehicle, or the BII may be normally stowed in the vehicle when not in use. In either case, it is the driver's responsibility to make sure the required items are on hand before operating the vehicle
which HMMWV variant is the primary vehicle carrying the s250 electrical equipment shelter and can also be configured fro troop cargo transport
M1152
Which type of armor protection includes built-in armor plus the capability of accepting add-on armor kits that can be installed or removed as required by the mission?
Integrated Armor Protection (IAP)
Integrated Armor Protection (IAP)
Integrated Armor Protection (IAP) provides factory-installed, or built-in, armor protection, plus the capability of accepting add-on armor kits. These kits can be installed or removed as required
Fuel filter
Is designed to separate out moisture in the fuel while the engine is operating
Power steering reservoir dipstick
Is used to check the fluid level
Fuel filter drain valve
Is used to remove any water that has collected in the fuel filter
Instrument Cluster Introduction
It is important to know how your vehicle is performing at all times so you can react immediately to any abnormal conditions. The instrument cluster provides indications of the: -Oil pressure -High beam lamp illumination -Engine coolant temperature -Battery charging system -Vehicle speed -Fuel level Two panel lights provide illumination for the gauges.
Exterior Components Lifting Shackles
Lift points and lifting shackles, common features on tactical vehicles, are located on the front and rear of the vehicle. They provide for airlifting a vehicle to a drop zone. The rear lifting shackles and tiedown shackles on the front bumper serve as tiedown points for securing a vehicle aboard ship.
five tactical HMMWV
M1114 M1123 M1151/M1151A1 M1152/M1152A1 M1165/M1165A1
Characteristics and Capabilities M1114
M1114 -generally used in surveillance and patrol missions -This ECV is an up-armored vehicle that provides ballistic protection -360-degree rotating platform for crew-served weapons such as machine guns -The armored M1114 weighs about 2,000 lb more than a HMMWV without armor. Its cargo capacity is limited to 2,300 lb, including crew. Gross vehicle weight with cargo and crew is 12,100 lb
Which two HMMWV models are frequently equipped with a weapon station?
M1114 and M1151A1
Which HMMWV is a pre-ECV model and can be configured with the Marine Armor Kit?
M1123
Characteristics and Capabilities M1152/M1152A1
M1152 ECV -carries S250 Electronical equipment shelter -2 door vehicle -can be configured for troop and cargo transportation -cargo capacity of 5,100lb including crew M1152A1 -Integrated Armor Protection (IAP) -armor with underbody has a cargo capacity of 3,3400lb -gross vehicle weight with crew armor and shelter is 12,100 lb
Characteristics and capabilities of the M1165/M1165A1
M1165 -used as a command and control vehicle -configured as a four door vehicle -can carry 4,950lb cargo + crew M1165A1 -integrated Armor Protection (IAP) -fully armored with underbody has 2,230lb crew + cargo weight capacity -Gross vehicle weight 12,100lb
which type of armor protections is installed on the armored M1123 and includes upgrades to suspension and air conditioning?
Marine armor kit (MAK)
Select the Technical Manual button for a sketch of the drivetrain from the operator's manual. Which of the following drivetrain components does the letter D identify on the sketch?
Propeller Shafts
Power steering pump
Provides pressurized fluid to operate other engine components
You are turning on the headlights on a vehicle equipped with the pushbutton light switch. After you push SER. DRIVE, the button indicator begins to flash. What is your next step?
Push ENTER button within five seconds.
Vehicle Systems Air Conditioning System
The armored ECVs and the M1123 with the Marine Armor Kit (MAK) installed have been upgraded with an air conditioning (A/C) system. The A/C system installed in armored vehicles allows the ballistic-resistant windows to remain closed even in harsh weather. The major components of the A/C system are similar for both the two-man and four-man vehicles.
Characteristics and Capabilities Cruising Range
The average cruising range of an ECV HMMWV is 250 miles on a hard surface at speeds of 30 to 40 miles per hour (mph). You should plan for refueling during your trip if your expected driving distance exceeds this range. This is a general range specification. Factors, such as added weight of cargo and armor and difficult terrain, can affect the cruising range.
Engine Compartment Brake Master Cylinder
The brake master cylinder/reservoir is located on the left side, inside the fender well, on the engine firewall. The brake master cylinder is normally serviced by unit maintenance with operator assistance. To check the brake fluid level: 1. Clean the cover's exterior before removing to prevent dirt, water, or grease from contaminating the fluid. 2. Using thumb pressure, swing the bail wires down from the top of the cover. 3. Remove the cover. 4. Verify that the fluid level is 1/8 inch from the top of the reservoir. If necessary, add silicone brake fluid (BFS) to bring the fluid to the proper level. 5. Replace the cover. Note: Procedures for checking fluid level are found in: -TM 11033-IN, Vol 1 for the ECV -TM 2320-20 7B, Vol 1 for the M1123
Dashboard Switches and Lights Brake Warning Lamp
The brake warning lamp is just to the right of the wait-to-start lamp. The brake warning lamp illuminates when: The parking brake is applied. There is a malfunction in the brake system, such as a fluid leak.
Engine Compartment Coolant Surge Tank
The coolant surge tank is located at the right rear of the engine, directly behind the air cleaner. This tank is pressurized. Do not remove the cap when the engine is hot or immediately after shutting down the engine. The tank's fluid level should be at the COLD FILL LINE before operation and slightly above after operation. If coolant is low, add coolant in accordance with the operator's manual. The radiator drainvalve is used to drain coolant from the radiator. note: Normally, an operator will not drain the radiator unless assisting a mechanic who is servicing the cooling system.
Instrument Cluster Coolant Temperature Gauge
The coolant temperature gauge indicates engine coolant temperature in degrees Fahrenheit (° F). The normal operating range for the ECV is slightly higher than the normal range for the M1123 as shown below.
Dashboard Switches and Lights Dimmer Switch
The dimmer switch is located to the left of the brake pedal. While driving with headlights, you can depress the dimmer switch with your foot to switch between high beam and low beam headlights
Dashboard Switches and Lights Directional Signal/Emergency Flasher
The directional signal/emergency flasher assembly is on the left side of the steering column. It consists of a directional signal lever, warning hazard control, and indicator light. The indicator light flashes on and off when you use the turn signal or turn on the warning flashers.
Document Revision
The document number may include an alphabetic character to designate a major revision of the manual. The letter "A" would identify the first revision of a manual; "B" would identify the second revision, etc. For example, in the manual number "TM 2320-10/6B," the "B" identifies that this edition is the second revision of the manual.
Engine Compartment Engine Oil Dipstick
The engine oil dipstick is located on the left side of the engine, near the power steering reservoir. The engine must be off when checking the oil level. To check the engine oil level: 1. Turn the "T" handle counterclockwise (if a deep-fording kit is installed) and pull out the dipstick. 2. Clean the dipstick with a rag. 3. Check the fluid level on the dipstick: a. Reinsert the dipstick. b. Remove the dipstick. c. Check the level of the oil using the markings on the dipstick. 4. Replace the dipstick and turn clockwise to tighten.
Engine Compartment Engine Oil Filler Cap
The engine oil filler cap is located at the front center of the engine. To add engine oil, remove the oil filler cap by turning it counterclockwise Use only the appropriate engine oil for the operating condition in accordance with the technical manual.
Basic Issue Items Pamphlet Bag
The pamphlet bag holds the operator's manual and may contain other manuals or instructions for equipment installed on the vehicle. The pamphlet bag is kept under or behind the driver's seat.
Drivetrain
The expanded capacity vehicles (ECVs) have four driving wheels, powered by a V-8, liquid-cooled, turbocharged diesel engine. The drivetrain connects the engine to the wheels. It consists of a transmission, transfer case, differentials, and hubs. The drivetrain provides various transmission and transfer case drive ranges to handle the different terrain and driving conditions you may encounter.
Engine Compartment Fan Clutch Override
The fan clutch override is located next to the windshield washer reservoir. If the engine is overheating, and you find that the radiator fan is not activating, unplug the two-wire connector between the time delay module and the fan control valve to activate the fan and cool the engine.
Basic Issue Items First Aid Kit
The first aid kit contains basic items used to treat injuries. It is usually stowed under the driver's seat Note: For the M1114, the operator's manual lists the stowage location as the battery compartment. However, due to possible battery residue contamination, the first aid kit is usually stowed under the driver's seat.
document type
The first two letters in the document number identify the document type. These letters are usually an abbreviation of the publication name. For example: -TM stands for technical manual -FM stands for field manual -LI stands for lubrication instruction
Dashboard Switches and Lights Light Switch Controls - Exterior Lights
The following light switch selections illuminate external lights: STOPLIGHT - Enables operation of the turn signals and brake lights without the headlilghts. Generally used for daylight driving. SER. DRIVE - Turns on the headlights and taillights for night driving and enables operation of the turn signals and brake lights. On some installations, headlights may be required during daylight hours. B.O. DRIVE - Turns on blackout markers and hooded blackout headlight and enables operation of the blackout stoplights when the brake pedal is depressed. B.O. MARKER - Turns on the blackout markers without the hooded headlight and enables blackout stoplight operation when the brake pedal is depressed. PARK - Turns the parking lights on and the headlights off.
Dashboard Switches and Lights Fording Valve
The fording valve is part of the deep water fording kit installation. The fording kit allows the HMMWV to make hard bottom water crossings in water as deep as 60 inches, without flooding the engine. The fording valve control has two positions: •VENT - Use this position for normal driving and for crossing through shallow water no deeper than 30 inches. •DEEP FORD - Use this position for fording when the water is between 30 and 60 inches deep.
Dashboard Switches and Lights Fording Valve
The fording valve is part of the deep water fording kit installation. The fording kit allows the HMMWV to make hard bottom water crossings in water as deep as 60 inches, without flooding the engine. The fording valve control has two positions: -VENT - Use this position for normal driving and for crossing through shallow water no deeper than 30 inches. -DEEP FORD - Use this position for fording when the water is between 30 and 60 inches deep. Note: Deep water fording is not applicable to the M1114
Drivetrain Differentials
The front and rear differentials transmit driving power from the transfer case, through the half shafts, to the geared wheel hubs for all four wheels. When the transfer case is in high (H) range, each differential applies power to the wheel that has the best traction.
Engine Compartment Fuel Filter Drainvalve
The fuel filter drainvalve is located on the front of the engine firewall, directly below the windshield washer reservoir. If there is any moisture in the fuel, the fuel filter is designed to separate out and hold that moisture while the engine is operating. After you stop the vehicle, the fuel filter drainvalve can be used to remove any water that has collected in the fuel filter.
Instrument Cluster Fuel Gauge
The fuel gauge indicates the amount of fuel in the tank. Note: Be sure to add fuel before operating the vehicle. Do not rely on a potentially faulty gauge reading, especially if refueling during your mission may be a problem.
Exterior Components Fuel Tank Filler Cap
The fuel tank filler cap, on the right rear side of the vehicle, provides access to the fuel tank for refueling. The cap screws to the fuel tank opening. It is secured to the fuel tank opening by a chain. A screen in the neck of the tank opening helps to prevent debris from getting into the fuel tank. On the M1114, a fuel door covers the fuel tank filler cap.
Characteristics and Capabilities Road Grade
The fully loaded M1123 vehicle can climb a road grade as steep as 60 percent (31 degrees). The heavier ECVs, when fully loaded, are capable of climbing a grade of 40 percent (22 degrees). note: The road grade percentage represents the steepness of slope you can climb. For example, if you are driving up a hill with a 22 percent incline, you will climb 22 ft for every 100 ft traveled horizontally.
Characteristics and Capabilities Side Slope
The fully loaded M1123 vehicle can travel across a side slope of up to 40 percent (22 degrees). The heavier ECV vehicles, when fully loaded, can negotiate a side slope of 30 percent (17 degrees). To avoid the risk of rollover, you must be particularly careful, when traveling across a slope, not to exceed the capability of the vehicle. The danger of rollover increases as the vehicle weight and side slope angle increase.
Instrument Cluster High Beam Lamp
The high beam lamp illuminates when you switch the headlights to the high beam position.
Drivetrain Propeller Shafts
The propeller shafts, also called driveshafts, link the transfer case to the front and rear differentials. Universal joints, located at either end of the front and rear propeller shafts, permit inline driving power between the transfer case and differentials even though they are mounted at different angles.
Dashboard Switches and Lights Pushbutton Switch Controls
The pushbutton light switch controls exterior lights and instrument panel lights. The switch is operated by pushing the desired light selection button, then pressing the ENTER button. After selecting a different light pushbutton, the ENTER button must be pressed within five seconds or the light setting will not change. Your vehicle service lights are on. Perform the following steps to turn on the instrument panel lights. 1. push the PANEL BRT button to initialize the function 2. Push ENTER button within five seconds.
Speedometer/Odometer
The speedometer indicates vehicle speed: -The outer ring of numbers shows vehicle speed in miles per hour (mph). -The inner ring of numbers shows vehicle speed in kilometers per hour (km/h). The odometer indicates accumulated mileage. The maximum allowable speed for M-Series vehicles on most military installations is 45 mph. Check the regulations aboard your installation before operating the vehicle.
Dashboard Switches and Lights Tachometer/Hour Meter
The tachometer is located above the windshield, beside the wiper motor. It shows engine revolutions per minute (RPM) and engine running time in hours. The tachometer hour meter is important when planning maintenance, especially for vehicles with communication or radar equipment that remain stationary with the engine running for long periods. For example, engine oil is usually changed every 3000 miles. But when the engine has been run for 200 hours following an oil change, the technical manual requires that the oil be changed again, even if the vehicle has not traveled a long distance.
Exterior Components Tailgate
The tailgate is located at the rear of the vehicle. Chains and hooks on either side of the tailgate secure the tailgate to the rear of the vehicle's body. The tailgate chains are covered with a silencing material to minimize the noise during tactical operations. Some vehicles have a rear hatch or shell door. Support rods on either side of the hatch hold it open when loading.
tool bag
The tool bag holds the following hand tools: -Slip-joint pliers -Cross-tip screwdriver: number 2 phillips cross-tip screwdriver 7 1/2 inches long -Flat-tip screwdriver 7 3/4 inches long with a 3/16 inch wide tip -Adjustable wrench: Adjustable Wrench, 8 inches long
Exterior Components Towing Pintle
The towing pintle, located at the center rear of the vehicle, provides a connection point for towing equipment such as a trailer. The HMMWV can also flat tow a disabled HMMWV using a tow bar.
Exterior Components Trailer Receptacle
The trailer receptacle, located near the towing pintle, provides electrical power to the lights on towed equipment. When the trailer's electrical cable is plugged into the receptacle, the trailer's lights operate in tandem with the vehicle's lights.
Drivetrain Transfer Case
The transfer case directs engine-to-transmission power to the front and rear propeller shafts and differentials simultaneously. The HMMWV is always in four-wheel drive. The transfer case has four shift range selections for different driving situations: -Three drive positions -A neutral position The "normal" transfer case range on hard road surfaces is high (H). High lock (H/L) and low lock (L) are only used when one or more wheels are slipping due to mud, ice, snow, or other adverse conditions.
Shift Lever Console Transfer Case Range Selection
The transfer case selection lever has four positions for different driving situations. Select the high lock (HL) range when the wheels are slipping and additional traction is needed. when operating in mud, snow, loose sand, or on ice this range can increase traction and import vehicle control. Select the high (H) range when operating on all dry primary, secondary, and off-road surface, with little or no wheel slippage. this range should be used on all high traction surfaces. select the neutral (N) range when the vehicle is disabled and must be towed. Select the low (L) range only when high ranges do not provide sufficient power for steep hills or sufficient breaking on downgrades. this range should be used when the wheels are slipping in mud or snow and cannot be freed using the HL range.
Engine Compartment Transmission Oil Dipstick
The transmission oil dipstick is located at the right rear of the engine, just behind the coolant surge tank. Use the transmission oil dipstick to check the transmission fluid level per the procedure in the operator's manual. To remove the dipstick, lift the "T" handle to unlock, and then pull to remove. Check the fluid level on the dipstick. If low, add transmission fluid through the dipstick tube. When done, place the dipstick back into its opening and twist for a good seal. Then push the "T" handle down to lock
Permanent armor (M1114)
The up-armored M1114 has permanently installed armor protection including steel-plated doors, steel plating under and over the cab, ballistic-resistant glass, and a ballistic-resistant grille. The M1114 armor is not designed for removal/reinstallation
Instrument Cluster Voltmeter
The voltmeter indicates the charging level and activity of the battery charging system when the engine is running. The voltmeter normally registers in the green area. If the voltmeter needle stays in the yellow or red areas, the battery is not charging and the vehicle is not fully mission capable.
Dashboard Switches and Lights Directional Signal/Emergency Flasher - Warning Hazard Control
The warning hazard control causes all the run signal lights to flash on and off at the same time 1. Turn light switch to STOP LIGHT or SER. DRIVE. 2. Push the wiring hazard control tab. 3. Move the directional signal lever up. Note: The brake lights override the vehicle's hazard warning lights. If you push on the brake pedal, the hazard warning lights will not flash.
Drivetrain Wheel Hubs
The wheel hubs are the final drive components to the front and rear wheels. The hubs are unusual in that they are geared. This design allows for a gear reduction to increase torque to the wheels.
Dashboard Switches and Lights Windshield Wiper Control
The windshield washer/wiper control knob is located on the wiper motor, at the center top of the windshield. Washer/wiper operation is as follows: Rotate the control knob clockwise to low or high speed to turn on the wiper. To operate the washer, first turn on the wiper, and then press the control knob.
Vehicle Systems Introduction
There are three additional HMMWV systems with which you should be familiar. Two of the systems are installed on armored ECVs: Air conditioning for the crew Automatic fire suppression The third system, a weapon station, is installed on the M1114 and M1151 armament carriers.
Dashboard Switches and Lights Light Switch Types
There are two versions of light switch used in the HMMWV, a lever-type and a pushbutton switch. The lever-type switch is most commonly used, but some vehicles have the pushbutton switch installed.
illustrations
Throughout the manual, drawings and illustrations enable you to more easily recognize vehicle components, controls, and indicators, and to identify their location on the vehicle.
the M1123
is an earlier version of the HMMWV, developed prior to the ECV and before the widespread requirement for heavy armor on the HMMWV.
The Expanded Capacity Vehicle (ECV)
is the latest configuration of the HMMWV fleet.
Which major drivetrain component requires a fluid check during Daily PMCS?
Transmission
Dashboard Switches and Lights Lever-Type Switch Operation
Turning on any exterior or instrument panel lights with the lever-type light switch involves multiple steps. For example, with the lights off, the following steps are required to turn on the instrument panel lights. 1. Lift unlock lever to UNLOCK and hold 2. Turn selector lever to any position except OFF. 3. Turn auxiliary lever to PANEL BRT.
While driving the HMMWV you notice that the engine is overheating. When you stop and open the hood, you notice the radiator fan is not turning. Which of the following is an appropriate action to help cool the engine?
Unplug the connector between the time delay module and the fan control valve
Exterior Components Cargo Tiedowns
Use the cargo tiedowns and strap assemblies to secure cargo in your vehicle. Note: Individual weapons, packs, or troop gear are not cargo.
Shift Lever Console Transfer Case Shift Lever
Use the transfer case shift lever to select transfer case ranges. The transfer case indicator lamp just in front of the shift lever illuminates when the transfer case is shifted to the high lock (H/L) or the low (L) range. Before shifting the transfer case lever, you must stop the vehicle and put the transmission shift lever in neutral (N). Note: Under normal circumstances, you will be able to shift the transfer case with the vehicle stopped and engine running. But if the transfer case is hard to shift or you hear a grinding noise, shut off the engine, and then complete the transfer case shift.
Additional Authorization List Winch Kit Items
Vehicles with a winch may have one or more of the following AAL items as required items: Tree-saver strap - This strap helps to prevent winch cable damage to a tree or similar object used as an anchor. Tackle block - A pulley mechanism in the tackle block can provide additional leverage when using the winch. Shackle - The hook at the end of the winch cable can be replaced with a shackle for fastening the cable to some loads.
which drivetrain component transmits driving power from the transfer case through half shafts to the feared wheel hubs?
differential
what tool is used to release the frag 5 armored door combat lock form outside
emergenchy release wrench
you are approaching muddy terrain and need to prevent wheel slippage. what transfer case range position should you choose?
high (H) range
you are driving your M1165 on loose sand with the transfer case in H and need to increase traction. what transfer case range should you choose?
high lock (H/L) range
what component of the automatic fire extinguishing system (AFES detects smoke or heat
sensor
You are asked to assist another HMMWV that has a dead battery. What BII/AAL item would you use to assist in starting the other vehicle?
slave cable
the number of the operators lmanual in your vehicleends with a "C" what does the C mean
stands for combo and identifies all the different models the manual references ?????????
During a training mission, another M1152 HMMWV becomes mired in mud. while setting up to use your winch to pull the other vehicle out you decided to use a nearby pole as an anchor point. what additional authorization List item would you use to prevent damage to the pole?
three saver straps
which additional authorization list item can replace the hook at the end of the winch cable for fastening the cable to some load
tree saver strap
your passenger jammed his finger in the door of your m1114 and needs a bandage to stop the bleeding. where is the first aid kit located
under the drivers seat
