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TM 10-3930-638-24&P
1. STEERING GEAR ASSEMBLY. Consists of steering
column and rotary hydrostatic valve; has four hydraulic
connections. Operated by moving steering wheel attached
to shaft of steering column. When turned, steering gear
controls flow of hydraulic oil to and from steering cylinders.
Connections for pump pressure line, return line, and right
and left turn oil flow to steering cylinders. Lines from
right and left ports connect to tees; lines from tees to
steering cylinders are cross-connected so that steering
cylinders move in opposite directions when pressure is
applied.
2. STEERING CYLINDERS. Two used, one mounted
on each side of truck. Each end of cylinder attached to
front and rear chassis.
3. STEERING BYPASS VALVE. When open, allows
hydraulic oil to be transferred from one steering cylinder
to the other for towing forklift truck.
1-24. BODY AND TOWING
ATTACHMENTS
1. BODY. Constructed of heavy duty steel; consists of
front and rear chassis to which are bolted front and rear
fenders, engine hood and panels, and radiator shroud.
2. ROLL OVER PROTECTIVE STRUCTURE.
Constructed of heavy duty steel; bolted to front chassis.
1-25. HYDRAULIC LIFT SYSTEM
Protects operator from falling material and injuries due to
truck rolling over.
3. PINTLE AND TOW BAR. Located at rear of truck.
Pintle hook, tow bar and chains used for towing truck or
other vehicles.
1. CONTROL VALVE. Controls hydraulic oil flow to
lift, tilt, rotation, and side shift cylinders. Consists of an
inlet and outlet section, four spool (working) sections and
an end section. Each spool section controls a cylinder or
pair of cylinders to move forks and mast.
2. CONTROL LEVERS. Positions control valve spools,
in turn, allowing high pressure hydraulic oil to activate
cylinders.
3. TILT CYLINDERS. Two used. Activated by control
valve; tilts mast assembly forward or rearward. Minimum
forward tilt is 11 degrees; minimum rearward tilt is 22
degrees.
4. SIDE SHIFT CYLINDER. One used. Activated by
control valve; shifts fork carriage side-to-side.
5. LIFT CYLINDER. One used. Activated by control
valve. Two stage cylinder; raises or lowers fork carriage.
1-13
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