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TM 10-3930-671-24
Brake & Hydraulic Controls
Do not operate a lift truck if the service or parking brakes
are not operating properly.
NOTE
A low pedal reserve (clearance at floor plate) is normal.
1.
Inspect the brake linkage for excessive wear or
freeplay. Look for any irregular wear in the brake
linkage rod connections to the brake pedal.
2.
Operate service and parking brakes, all hydraulic
controls: lift, tilt, and auxiliary (if installed),
accelerator, directional controls, and steering
system. Be sure all controls operate freely and
return to neutral properly.
3.
Check shift (directional) controls for correct
operation and NEUTRAL position.
4.
Check the service brake system. Push the brake
pedal fully down and hold. The brakes should be
applied before pedal reaches the floor plate.
a)
Check for feeling of solid resistance when
the pedal stops. The pedal must feel firm
and not move down farther after it stops.
b)
If
the
pedal
continues
to
creep
downwards, report the failure. Do not
operate the truck until the brakes are
repaired.
5.
Check the function of the parking brake.
Release, then apply the parking brake with the
lever. When correctly adjusted, the lever should
snap-lock easily into the over-center applied
position.
6.
Check parking brake holding capability and
adjustment. Park truck on a grade and apply
parking brake. The parking brake should hold a
lift truck with rated load on a 15% grade. When
the lever is released, the brake shoes should not
drag.
Steering System
Never continue to operate a truck that has a steering
system fault. Injury to personnel may result
NOTE
The steering system, steer axle, and steering linkage
should be inspected periodically for abnormal looseness
and damage, leaking seals, etc. Check for any changes
in steering action. Hard steering, excessive free-play
(looseness), or
unusual
sounds
when
turning
or
maneuvering indicates a need for inspection and
servicing.
1.
With engine idling, check steering system by
moving steering handwheel in a full right turn,
then in a full left turn. Return handwheel (steer
wheels) to the straight-ahead position.
2.
The
steering
components
should
operate
smoothly when the steering wheel is turned.
Listen for the steering pressure relief valve to
bypass when the steer wheels hit the stops. The
engine should not "lug down or stall. If it does,
the engine idle speed is too slow, or power
steering system relief pressure valve may be
malfunctioning.
3.
Turning effort should be the same in either
direction. The truck should drive in a straight line
without drifting to either side.
F-47
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