Rayco C275, Инструкция оператора, обслуживания и технического обслуживания

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11008567 • Rev AE • November 2009
Series 51 and 51-1 Motors
Service Manual
Troubleshooting
sluggisH system
system oPeRating Hot
Check Cause Corrective action
1. Control orifices Blocked or restricted orifice will cause sluggish
response. Orifices installed to the wrong
locations will cause PCOR control to be sluggish. Remove, inspect and clean all orifices. Ensure the
appropriate orifices are installed.
2. Threshold setting (proportional
controls) Inappropriately high threshold setting will shift
the motor at the wrong time. Check threshold setting. Adjust if necessary.
3. Control spool or piston A sticky 4-way spool or control piston will cause
sluggish response. Clean and inspect the 4-way valve spool and control
piston. Replace if necessary.
4. Pressure compensator setting Inappropriately low pressure compensating
setting will shift motor to maximum
displacement at lower pressure Check pressure compensator setting. Adjust if
necessary.
5. Control input signal An improper or erratic input signal to the control
may cause sluggish response. Check input signal or electric current and correct if
necessary.
6. Charge pressure Inappropriately low pressure setting at loop
flushing relief valve may cause improper supply
pressure to motor control. Measure change pressure in forward and reverse.
Adjust loop flushing relief valve if necessary.
7. System pressure Inappropriately low system pressure setting may
cause sluggish response. Measure system pressure. Adjust pump pressure
limiter or system relief valve if necessary.
8. Internal leakage Excessive leakage will cause lower charge
pressure and affect performance. Install loop flushing defeat option and monitor case
flow. If case flow is excessive, motor may require
major repair. Contact your Sauer-Danfoss service
provider.
Check Cause Corrective action
1. Oil level Insufficient hydraulic fluid will cause overheating. Fill reservoir to proper level.
2. Heat exchanger Blocked heat exchanger or low air flow will not
sufficiently cool the system. Check temperature upstream and downstream
of heat exchanger. Clean, repair, or replace heat
exchanger if necessary.
3. Loop flushing charge pressure Inappropriately high loop flushing relief valve
setting will reduce or prevent loop flushing flow.
Improper orifice size will not give proper flow for
cooling purposes. Monitor case drain flow. If low, adjust loop flushing
relief valve setting or replace with orificed type
relief.
4. System pressure If system relief valve settings are too low, excess
heat will be generated. Adjust system relief valve settings.
5. Air in system Entrained air generates heat under pressure and
causes cavitation
Look for foam or bubbles in reservoir. Check for
leaks on inlet side of charge pump.
6. Internal leakage Excessive internal leakage will overheat the
system. Install loop flushing defeat option and monitor case
flow. If case flow is excessive, motor may require
major repair. Contact your Sauer-Danfoss service
provider.