STEERING - TM-10-3930-622-140055

and equally applied to both front wheels. Note any

"mushiness" or "creeping" of. the brake pedal or A

tendency of the wheels to lock, pull to one side or

produce unusual noises. Test the hand brake with the

vehicle on an incline, noting if there is any tendency to

creep.

5-36. STEERING. Check the steering wheel travel for

hard steering, poor return to center and noises. The rear

wheels should have a tendency to straighten out when

pressure on the steering wheel is relaxed.

5-37. UPRIGHT ASSEMBLY HYDRAULIC SYSTEM.

Check the hydraulic system with a substantial load on

the forks by testing operation of both the tilt and hoist

Figure 5-1. Cylinder Head Screw Tightening

cylinders through their complete area of movement.

Pushing the control valve handle marked "HOIST" back

c. A final tightening and checking of torque should

raises the forks to the extreme top of the upright

be made after the engine has been run and is still warm.

assembly. With load raised and control in neutral

position, check for any creep-down of the loaded fork.

5-43. INTAKE AND

EXHAUST

VALVE

TAPPET

After test, inspect hydraulic system for leaks. Slowly

ADJUSTMENT.

push lever forward and allow the forks to bottom by

gravity. If, in raising hoist, the lever is not returned to

a. Start engine and allow it to run until normal

neutral when top is reached, the over-load bypass in the

operating temperature is reached. Stop engine, remove

control valve will open automatically and detour the flow

valve cover assembly and cover gasket.

of oil back to the reservoir tank. This action is indicated

b. Start engine and insert feeler gauge between

by a buzzing sound which is normal. Note if there is any

valve tappet and valve stem. (See Figure 5-2) Loosen

tendency of channels to bind and be sure there is

the tappet, adjusting lock nut, and adjust tappet until

complete freedom of the crosshead assembly, both up

there is a clearance of 0.007 inch on the intake and

and down. In testing of the tilt operation, when lever

0.010 inch on the exhaust. Tighten the tappet adjusting

marked "TILT" is pulled back to its extreme, the forks

lock nut when properly adjusted.

should tilt up and back. When the tilt lever is pushed

c. Repeat the above adjustment procedures on all

forward, the forks should tilt out or down. Both tilting

intake and exhaust valve tappets. Stop the engine and

actions are accomplished by hydraulic pressure. Note

inspect all visible valve components for wear or

any tendency for either the hoist or tilt action to hesitate

weakness.

or mush.

d. Install valve cover assembly and a new cover

5-38. LIGHTS. Turn on ignition switch and check

gasket.

operation of stoplight by pressing brake pedal. Turn on

taillight.

5-39. ORGANIZATIONAL MAINTENANCE.

5-40. The following maintenance services are to be

performed by the using organization personnel and are

referenced to the periodic service inspection starting with

paragraph 5-8. The operations listed can be completed

with the tools and equipment normally available at the

using organization.

5-41. ENGINE ASSEMBLY.

5-42. CYLINDER HEAD TIGHTENING.

a. Using a torque wrench, tighten cylinder head

nuts and stud nuts in the sequence shown in Figure 5-1.

b. Tighten cylinder head nuts to a torque of 35 to

Figure 5-2. Valve Tappet Adjustment

40 foot-pounds.