MTD 500 Series Operator's Manual page 17

For Parts Call 606-678-9623 or 606-561-4983 For Parts Call 606-678-9623 or 606-561-4983
Hydraulic Troubleshooting
P o r b e l m
Cylinder rod will not move 1. Broken drive shaft.
2. Shipping plugs left in hydraulic
3. Set screws in coupling not adjusted
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.
Slow cylinder shaft speed 1. Gear sections damaged.
while extending and 2. Excessive pump inlet vacuum.
retracting.
3. Slow engine speed.
4. Damaged relief valve.
5. Incorrect oil level.
6. Contaminated oil.
7. Directional valve leaking internally.
8. Internally damaged cylinder.
Leaking cylinder 1. Broken seals.
2. Scored cylinder.
Engine runs but wood will 1. Small gear section damaged.
not split or wood splits too 2. Pump check valve leaking.
slowly 3. Excessive pump inlet vacuum.
4. Incorrect oil level.
5. Contaminated oil.
6. Directional valve leaking internally.
7. Overloaded cylinder.
8. Internally damaged cylinder.
Engine stalls during 1. Low horsepower/weak engine.
splitting 2. Overloaded cylinder.
Engine will not turn or 1. Engine/pump misalignment.
stalls under low load 2. Frozen or seized pump.
conditions 3. Low horsepower/weak engine.
4. Hydraulic lines blocked.
5. Blocked directional valve.
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.
NOTE: For repairs beyond those listed here, contact your nearest authorized service center.
C a u s e
hoses.
properly.
1
www.mymowerparts.com www.mymowerparts.com
R e m e d y
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.
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.
1. See authorized service dealer.
2. See authorized service dealer.
1. See authorized service dealer.
2. See authorized service dealer.
3. Make certain pump inlet hoses are clear
and unblocked-use short, large
diameter inlet hoses.
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.
1. See authorized service dealer.
2. Do not attempt to split wood against the
grain or see authorized service dealer.
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.
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.

Hydraulic
Trouble
Shooting
For repairs beyond
the minor adjust-
ments listed here,
contact an authorized
service dealer.