Craftsman 247.77466.1 Operator's Manual page 19

Problem
Slow cylinder shaft
speed while extending
and retracting.
Leaking Cylinder
Engine runs but wood
will not split or wood
splits too slowly
Engine stalls during
splitting
Engine will not turn or
stalls under low load
conditions
Leaking pump shaft
seal
Will not split logs
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. 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.
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. Low horsepower/weak engine.
2. Overloaded cylinder.
1. Engine/pump misalignment.
2. Frozen or seized pump.
3. Low horsepower/weak engine.
4. Hydraulic lines blocked.
5. Blocked directional valve.
1. Broken drive shaft.
2. Engine/pump misalignment.
3. Gear sections damaged.
4. Poorly positioned shaft seal.
5. Plugged oil breather.
1. Reservoir fluid level low.
1
Remedy
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.
1. Return unit to Sears service center.
2. Return unit to Sears service center.
3. Make certain pump inlet hoses are
clear and unblocked. Use short,
large diameter inlet hoses.
4. Check oil level. Refill if necessary.
5. Drain oil, clean reservoir, and refill.
6. Return unit to Sears service center.
7. Do not attempt to split wood
against the grain.
8. Return unit to Sears service center.
1. Return unit to Sears service center.
2. Do not attempt to split wood
against the grain. If engine stalls
repeatedly, contact Sears service
center.
1. Correct alignment as necessary.
2. Return unit to Sears service center.
3. Return unit to Sears service center.
4. Flush and clean hydraulic system.
5. Return unit to Sears service center.
1. Return unit to Sears service center.
2. Correct alignment as necessary.
3. Return unit to Sears service center.
4. Return unit to Sears service center.
5. Make certain reservoir is properly
vented.
1. Refill with Dexron III automatic
transmission fluid.