Preparation for Start-up

TM 10-3930-633-12

Normal Use or Reading

Nomenclature

Pull out to illuminate rear light, Push in to turn off light.

Back-up Light Switch

Indicates total engine operating time in hours and tenths.

Hourmeter

Depress to apply service brakes.

Service Brake Pedal

Depress to increase engine speed.

Accelerator

Selects desired forward gear, reverse, or neutral.

Transmission Gear Selector

Pull back to apply parking brake; push forward to release parking brake.

Parking Brake Lever

Turn clockwise to tighten linkage and remove slack.

Brake Lever Knob

Depress to sound horn.

Horn Button

Pull outward to permit fore and aft adjustment of seat position.

Seat Adjustment Lever

engine to warm up at a fast idling speed. Im-

2-3. Preparation for Start-up

mediately observe engine oil pressure gage and

ammeter for normal readings. As engine begins to

Operation of this equipment presents a

warm up, gradually push in on choke control; as

noise hazard to personnel in the area.

soon as engine is warm, push choke control all the

The noise exceeds the allowable limits

way in.

for unprotected personnel. Wear ear

e. Warm engine until it will idle smoothly with

muffs or ear plugs which were fitted by a

the choke control pushed all the way in. Check for

trained professional.

proper reading on ammeter, engine oil pressure

a. Perform Operator's Daily Checks as

gage, engine temperature indicator, and fuel

outlined in table 3-1.

gage. Be sure hourmeter is operating properly.

b. Pull up on parking brake lever to make

f. Remove foot pressure from accelerator

certain truck will remain stationary while it is

pedal. Report any malfunctions to the proper

being started.

authority.

c. Make certain the direction shift lever is in

neutral (N) position.

2-5. Mobile Operation

Operation of this vehicle is essentially the same as

2-4. Starting the Engine

that for any automotive-type equipment; all

controls and instruments are positioned con-

Do not operate vehicle for prolonged

veniently for operators use, and in approximately

periods in an unventilated d area. All

the same location or relationship as that used in

gasoline engines produce poisonous

an ordinary truck or passenger car. Operators

carbon monoxide gas which is extremely

should familiarize themselves with the steering

toxic if allowed to accumulate in a closed

and performance characteristics of the vehicle

area.

before attempting to perform any actual towing

a. At initial starting, or if engine is cold, pull

operations. Sudden starts, stops, and turns are to

choke control all the way out.

be avoided except in cases of emergency.

b. Press down on accelerator pedal ap-

proximately one-third the distance from its

2-6. Towing Operations

normal position.

During towing operations, keep vehicle in a gear

CAUTION

range that will provide adequate torque for

Do not operate the starter motor con-

negotiation of grades. Vehicle speed must be kept

tinuously for more than 30 seconds. If the

low enough that the vehicle and load can be safely

engine fails to start after 30 seconds,

stopped, within an assured clear distance.

allow the starter motor to cool for at

a. Always check the pintle hook connection to

least two (2) minutes before attempting

see that the hook is properly engaged with the

to start the engine again.

drawbar eye or coupling.

c. Turn ignition switch fully clockwise, against

b. When negotiating turns or operating in

spring tension, to the START position, and hold

areas where clearances are restricted, always take

while the starter cranks the engine. As soon as

into consideration the physical size and steering

the engine starts, release the switch.

characteristics of the load being towed.

NOTE

c. When towing loads at or near maximum

If engine becomes over-choked or carburetor

c a p a c i t y , and operating in low range con-

floods, push choke button in, depress accelerator

tinuously, closely monitor transmission oil

pedal fully, and engage starter. If all equipment is

temperature warning light. This light will come

in working order, the engine should start.

d Hold accelerator pedal steady and allow

2-2