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Page Title:
Table 5-1. Troubleshooting Guide (Continued) |
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 TM 10-3990-203-13&P
Table 5-1. Troubleshooting Guide (Continued)
REMEDY
PROBABLE CAUSE(S)
PROBLEM
Wheel bearing is defective.
Inspect then remove bad bear-
WHEEL ASSEMBLY WOBBLES
ing. (See para. 5.5.6.1.)
OR IS GRINDING DURING
TOWING
Loose wheel rim bolts.
Inspect and tighten (torque with
85-90 ft lbs).
Damaged bearing.
Replace defective bearing. (See
WHEEL WILL NOT TURN
p a r a . 5.5.6.1.)
Damaged or broken hydraulic
Replace defective hoses. (See
HYDRAULIC CYLINDER WILL
lines.
p a r a . 5.5.9.3.)
NOT ELEVATE
Plugged orifice.
Clean and rebuild pump. (See
p a r a . 5.5.9.1.)
Fill reservoir.
(See para.
Oil reservoir not full.
5.5.9.1.2.w.)
Bad cylinder seal.
Replace seal.
(See para.
5.5.9.1.)
Rebuild pump.
Fill reservoir.
(See para.
PUMP FUNCTIONS ON LAST
Oil reservoir not full.
5.5.9.1.2.w.)
PORTION OF STROKE ONLY
Rebuild p u m p.
Inlet ball leaking.
(See para.
5.5.9.1.)
Dirty inlet screen.
Clean screen and reservoir.
(See para. 5.5.9.1.)
Oil reservoir not full.
Fill reservoir.
(See para.
PUMP NOT BUILDING
5.5.9.1.2.w.)
PRESSURE
Inlet ball leaking.
Rebuild p u m p.
(See para.
5.5.9.1.)
Defective o-ring on selector
Rebuild p u m p.
(See para.
valve spool.
5.5.9.1.)
Relief valve improperly set
Clean and adjust.
or blocked open.
Rebuild p u m p.
(See para.
5.5.9.1.)
Defective o-ring on reservoir.
Replace o-ring.
(See para.
PUMP LEAKS BETWEEN
BASE AND RESERVOIR
5.5.9.1.)
Return orifice blocked.
RAMP DOES NOT GO ALL
Clean and replace orifice screw.
THE WAY DOWN WHEN PUMP
(See para. 5.5.9.1.)
CONTROL VALVE IS IN
Rebuild pump.
LOWER POSITION
Damaged seal.
OIL LEAK AT HAND PUMP
R e b u i l d pump.
(See para.
5.5.9.1.)
OIL LEAKS UNDERNEATH
Damaged hose.
R e p l a c e hose section.
(See
RAMP
p a r a . 5.5.9.1.)
RAMP ELEVATES UNEVENLY
Damaged cylinder.
Replace cylinder.
(See para.
5.5.9.20)
5-3
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