Craftsman 247.7764 Operator's Manual page 21

problem
Cylinder rod will not
move
Slow cylinder shaft
speed while extending
and retracting.
Leaking Cylinder
NOTE: This section addresses minor service issues. For further details, contact Sears service information line by calling
1-800-4-MY-HOME.
TROUBLESHOOTING
Cause
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 or blocked directional valve.
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. Broken seals.
2. Scored cylinder.
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1. Return unit to Sears service center.
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. Return unit to Sears service center.
6. Return unit to Sears service center.
7. Flush and clean hydraulic system.
8. Check oil level. Refill if necessary.
9. Return unit to Sears service center.
1. Return unit to Sears service center.
2. Make certain pump inlet hoses are
clear and unblocked. Use short,
large diameter inlet hoses.
3. Return unit to Sears service center.
4. Return unit to Sears service center.
5. Check oil level. Refill if necessary.
6. Drain oil, clean reservoir, and refill.
7. Return unit to Sears service center.
8. Return unit to Sears service center.
1. Return unit to Sears service center.
2. Return unit to Sears service center.
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21
Remedy