Replacement Part List

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Most problems are easy to fix. Consult the trouble shooting Table below for common problems and their solutions. An
unusual noise or vibration is generally a warning of trouble. Check for damaged parts and clean, repairs and / or replace
as necessary. If you continue to experience problems, contact us at www.boss-industrial.com
, send an email to
[e-mail], or call toll-free [phone] for support.
Problem
Cause
Remedy
Cylinder rod will not move
1. Broken drive shaft.
2. Shipping plugs left in hydraulic hoses.
3. Set screws in coupling not adjusted properly.
4. Loose shaft coupling.
5. Gear sections damaged.
6. Damaged relief valve.
7. Hydraulic lines blocked.
8. Low oil level or air trapped in hydraulic system.
9. Damaged control valve.
10. Blocked control valve.
1. See authorized service dealer.
2. Disconnect hydraulic hoses, remove shipping
plugs, and reconnect hoses.
3. See authorized service dealer.
4. Correct engine/pump alignment as necessary.
5. See authorized service dealer.
6. See authorized service dealer.
7. Flush and clean hydraulic system.
8. Fill oil or bleed air.
9. See authorized service dealer.
10. Flush and clean hydraulic system
Slow cylinder shaft speed while
extending and retracting
1. Gear sections damaged.
2. Excessive pump inlet vacuum.
3. Slow engine speed.
4. Damaged relief valve.
5. Low oil level or air trapped in hydraulic system.
6. Contaminated oil.
7. Control valve leaking internally.
8. Internally damaged cylinder.
1. See authorized service dealer.
2. Make certain pump inlet hoses are clear and
unblocked. Use short, large diameter inlet
hoses.
3. See authorized service dealer.
4. See authorized service dealer.
5. Fill oil or bleed air.
6. Drain oil, clean reservoir and refill.
7. See authorized service dealer.
8. See authorized service dealer
Leaking Cylinder 1. Worn seals.
2. Scored cylinder.
1. See authorized service dealer.
2. See authorized service dealer.
Wood will not split or wood splits too
slowly
1. Small gear section damaged.
2. Pump check valve leaking.
3. Excessive pump inlet vacuum.
4. Low oil level or air trapped in hydraulic system.
5. Contaminated oil.
6. Control valve leaking internally.
7. Overloaded cylinder.
8. Internally damaged cylinder.
1. See authorized service dealer.
2. See authorized service dealer.
3. Make certain pump inlet hoses are clear and
unblocked.
4. Fill oil or bleed air.
5. Drain oil, clean reservoir and refill.
6. See authorized service dealer.
7. Do not attempt to split wood against the grain.
8. See authorized service dealer.
Leaking pump shaft seal 1. Broken drive shaft.
2. Engine/pump misalignment.
3. Gear sections damaged.
4. Damaged shaft seal.
5. Plugged oil breather.
1. See authorized service dealer.
2. Correct alignment as necessary.
3. See authorized service dealer.
4. See authorized service dealer.
5. Make certain reservoir is properly vented.
Wedge continues to move forward
when control handle is released
1. Damaged control valve 1. See authorized service dealer.
Control handle does not return to
neutral when released from
forward position
1. Hydraulic fluid too cold.
2. Hydraulic fluid too thick.
3. Hydraulic fluid contaminated.
4. Damaged control valve.
1. Warm up engine.
2. Replace hydraulic fluid.
3. Replace hydraulic fluid.
4. See authorized service dealer.
TROUBLESHOOTING
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