Allied 300 - Troubleshooting

Allied Construction Products, LLC Technical Manual Ho-Pac 300, 300B & 500, 500B
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SECTION 9.0
TROUBLESHOOTING
This guide identifies several commonly
encountered conditions and the recommended
course of action. For conditions other than
these, contact the Allied Technical Service
Department.
CAUTION
Only qualified personnel, having
knowledge of the machine’s systems,
proper test equipment and tools should
attempt adjustments and repairs.
Fault
Cause
33BRemedy
Unit does not run
Insufficient oil pressure or
flow.
Check hydraulic supply
system. Correct as required.
Failed bearings.
Inspect and replace bearings.
Broken motor shaft or worn
splines.
Inspect and replace worn
parts.
Unit runs erratically
Erratic oil pressure or flow.
Check hydraulic supply
system. Correct as required.
Failed spring mount.
Inspect and replace failed
mount.
Unit runs with excessive
noise or vibration
Failed bearing.
Inspect and replace bearings.
Loose bolts or mounting
hardware.
Inspect and tighten bolts.
Unit runs, but stalls
under load
Pressure relief too low
Check hydraulic supply
system. Correct as required.
Failed bearing.
Inspect and replace bearings.
Motor worn or motor seals
failed.
Inspect and replace motor.
Unit runs smoothly, but
at reduced speed
Flow too low.
Check carrier output.
If motor or flow regulator valve
was replaced, check that the
motor and valve are properly
matched.
Oil discharge from
pressure relief vent
Oil level too high
Check oil level
Note: The performance of the attachment is
affected by a hydraulic system that is not
operating to specifications. If the attachment
is not working correctly, make a thorough
check of the carrier’s hydraulic system.
Using a flow meter, measure the oil flow
and determine the cracking pressure of the
relief valve. Include the hoses from the
attachment as part of the test. This will
eliminate the possibility of a collapsed hose.
Compare the results of your test with the
specifications in section 5.1.