SECTION V PREVENTIVE MAINTENANCE

TM 55-1740-200-14

e. Fill radiator with water and rust inhibitor (item 14,

3-29. COOLING SYSTEM. Service the cooling system as

table 1-3). If below freezing temperatures are

follows:

anticipated, add antifreeze (item 2, table 1-3) as

required.

a. Open radiator and engine drain cocks. Drain all

coolant and close drain cocks.

3-30. PARKING BRAKE ADJUSTMENT. Adjust the

tractor parking brake as follows:

b. Fill radiator with water and add cleaner (item 13,

a. Release the lever and turn the adjustment knob (top

table 1-3). Start engine and operate at idle speed for 30

of lever) counterclockwise until all drag is removed when

minutes.

the brake is applied.

c. Check for leaks, defective hoses, and defective

b. With the brake in the released position, turn the

radiator cap while engine is operating.

adjustment knob clockwise approximately three full turns

and apply the brake.

d. Stop engine and drain the radiator and engine.

c. Repeat step b until a definite drag is felt when the

Replace defective components as required. Close drain

brake is applied.

cocks.

V PREVENTIVE MAINTENANCE

SECTION

b. Use the spray gun to clean the cab exterior, engine,

3-31. GENERAL.

transmissions and winch equipment. Allow the solvent to

remain on surfaces approximately fifteen minutes.

3-32. This section contains the necessary instructions for

preventive maintenance on the towing tractor including

c. Rinse all components thoroughly with hot water

cleaning, lubrication, and extreme environmental

under slight pressure. Use cold water if hot water is

maintenance.

unavailable.

3-36. CLEANING EQUIPMENT FOR COMPONENTS

3-33. CLEANING.

AND INDIVIDUAL PARTS.

3-34. EXTERIOR CLEANING EQUIPMENT.

3-37. Equipment and materials required for cleaning

individual components and parts are as follows:

3-35. An approved steam cleaning machine, using

compound (item 16, table 1-3) should be used on the

a. Decreasing tank of adequate size to accept large

chassis and running gear. To clean the engine, cab, frame

transmission housing and axles.

and winch, use a suitable spray gun with a mixture of one

part cleaning solvent (item 17, table 1-3) with four to

b. Steel paint scraper and hand or powered wire

nine parts cleaning solvent (item 18, table 1-3) or

brushes.

kerosene (item 19, table 1-3) and clean as follows:

c. Emery paper, crocus cloth and various grades of

a. Use steam cleaner to clean the chassis and running

sand paper.

gear. Do not use excessive steam on rubber tires, seals,

hoses, or protective boots.

d. Clean cloths for wiping and wrapping cleaned parts.

e. Trichlorethylene, item 20, table 13.

Avoid directing solvent spray on electrical

f. Decreasing solvent, item 21, table 13.

components.

3-7