Danfoss H1F 080, Руководство по обслуживанию

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Overview
This section provides general steps to follow if you observe undesirable system conditions. Follow the
steps until you solve the problem. Some of the items are system specific. Always observe the safety
precautions in the
Introduction section.
W
Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To protect against unintended movement, secure the machine or disable/disconnect the mechanism
while servicing.
H1F Sluggish operation
Check Cause Corrective action
1. Internal leakage Excessive leakage will cause lower charge pressure
and affect performance. Install loop flushing defeat option and measure case
flow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.
System operating hot
Check Cause Corrective action
1. Oil level Insufficient hydraulic fluid may cause overheating. Fill reservoir to proper level.
2. Heat exchanger Blocked heat exchanger or low air flow may cause
system overheating. Check temperature upstream and downstream of heat
exchanger. Clean, repair, or replace heat exchanger if
necessary.
3. Loop flushing flow Restricted orifice in loop flushing cartridge reduces
flow. Measure case drain flow. Clean or replace orifice
cartridge.
4. Loop flushing shuttle Loop flushing shuttle may be sticking in one
direction. Ensure shuttle moves freely in its bore.
5. Air in system Entrained air generates heat under pressure Look for foam or bubbles in reservoir. Check for leaks
on inlet side of charge pump.
6. Internal leakage Excessive internal leakage may overheat the
system. Install loop flushing defeat option and monitor case
flow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.
Excessive noise or vibration
Check Cause Corrective action
1. Oil level in reservoir Insufficient hydraulic fluid may cause cavitation. Fill reservoir to proper level.
2. Air in system Air bubbles may lead to cavitation. Look for foam or bubbles in reservoir. Check for leaks
on inlet side of charge pump.
3. Shaft coupling Loose shaft coupling may create excess noise. Replace loose shaft coupling. Replace or repair motor
if shaft splines show excessive wear.
4. Shaft alignment Misaligned shafts may create excessive noise and
vibration and can damage motor. Correct shaft misalignment.
Service Manual
H1F Bent Axis Fixed Displacement Motors, Size 080
Troubleshooting
© Danfoss | December 2023 AX465363259664en-000102 | 23