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
anticipated, add antifreeze (item 2, table 1-3) as
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
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.
V PREVENTIVE MAINTENANCE
b. Use the spray gun to clean the cab exterior, engine,
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
3-36. CLEANING EQUIPMENT FOR COMPONENTS
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
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
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.