Start your engines
What is the difference between gas engines and diesel engines?
Gas have spark plugs/ gas and air are mixed, then compressed and ignited
Diesel: the air is compressed before fuel is injected
What are the components of the electrical system?
Battery, Alternator, and starter
Palatized loading system
What type of suspension system is used on the A4 model of the Hemtt series?
Air bag suspension
You are about to work on vehicles for electrical issue, when a vehicle is in the shop, what are the first 2 things you do?
Set brakes and chalk wheels
Fuel, air, spark
What is an anaerobic sealer?
Where would you apply it?
Its used between transmission, transfer case, and hubs on a HMMWV
What is a CTIS system?
System that allows tires to inflate/deflate for the terrain vehicles are on
Describe what are the 2 strokes of an engine.
Intake- upward stroke
Compression- downward stroke
Combustion- upward stroke
Exhaust- downward stroke
Your looking at a vehicle, what is the first step when testing out a circuit?
Turn of the power
Intake
Compression
Combustion
Exhaust
How would you check a vehicle's battery?
Check terminals, looks for corrosion or looseness, connect multimeter, load test battery, gravity tester snap on battery tester for bad cells, low voltage, recharge batteries
Heavy Expanded Mobility Tactile Truck
Explain the procedures for troubleshooting a typical light bulb procedure
check bulb
check connection
check voltage
check ground
check switch
check wiring
What 2 types of diagnostic tools do you use to trouble shoot codes at CSMS?
MSD using the IETM and pro link
If glow plugs break inside the cylinder, how would you remove them from 6.5 engine?
Allign affected cylinder to Top Dead Center, remove 3 different ways
1. pliers through injector nozzle opening
2. used/ blow into glow plug port
3. using 90 degree pliers, insert through injector nozzel
Where is the taper and why?
Cylinder is tapered @bottom because if it was top it would lose compression
What are the components of the power steering system on a HMMWV?
Power Steering Reservoir, power steering pump, hydro booster, gear box
Describe the fuel system components.
Fuel tank
Fuel water separator
Fuel pump
Fuel fitter
Injector
How would you bleed a power steering pump to get all air out of lines in a M1165A1?
turn steering wheel left and right all the way 40 times
let sit till bubbles dissipate the refill to fill the line
repeat until the system is full with no more air in system or whining noise is heard
How might you remove a BAD expanded glow plug for a 6.5 diesel engine?
1. If possible run the engine to temp
2. shut off the engine
3. loosen threads
4. twist plugs out
- Disconnect lead from glowplug; remove glowplug
What are the components of a HVAC system?
Compressor/condesor/reciever/expansion valve/evaporator
What does the acronym HMMWV stand for?
High Mobility Multipurpose Wheeled Vehicle
Explain What each component does in the cooling system.
Resivior stores coolant expands when the engine is up to temp
cool air pulls air through the radiator to help with temp
water pump moves coolant through engine
thermostat monitors temp of engine
heater core increases heat in vehicle cabin
When troubleshooting, what procedures should be used to find faults?
TM procedures
diagnostic equipment