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HYDRAULIC TROUBLESHOOTING
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. Incorrect oil level.
9. Damaged directional valve.
10. Blocked directional valve.
1. See authorized service dealer.
2. Disconnect hydraulic hoses, remove
shipping plugs, reconnect hoses.
3. See operator’s manual for correct
adjustment.
4. Correct engine/pump alignment as
necessary.
5. See authorized service dealer.
6. See authorized service dealer.
7. Flush and clean hydraulic system.
8. Check oil level.
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. Incorrect oil level.
6. Contaminated oil.
7. Directional 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. Check oil level.
6. Drain oil, clean reservoir, and refill.
7. See authorized service dealer.
8. See authorized service dealer.
Leaking cylinder 1. Broken seals.
2. Scored cylinder.
1. See authorized service dealer.
2. See authorized service dealer.
Engine runs but 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. Incorrect oil level.
5. Contaminated oil.
6. Directional 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. Check oil level.
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.
Engine stalls during
splitting
1. Low horsepower/weak engine.
2. Overloaded cylinder.
1. See authorized service dealer.
2. Do not attempt to split wood against the
grain or see authorized service dealer.
Engine will not turn or
stalls under low load
conditions
1. Engine/pump misalignment.
2. Frozen or seized pump.
3. Low horsepower/weak engine.
4. Hydraulic lines blocked.
5. Blocked directional valve.
1. Correct alignment as necessary.
2. See authorized service dealer.
3. See authorized service dealer.
4. Flush and clean hydraulic system.
5. Flush and clean hydraulic system.
Leaking pump shaft seal 1. Broken drive shaft.
2. Engine/pump misalignment.
3. Gear sections damaged.
4. Poorly positioned 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.