Craftsman 247.774500 Operator's Manual page 15

Problem Possible Cause Corrective Action
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 or blocked directional
valve.
1. Gear sections damaged.
2. Excessive pump inlet vacuum.
Cylinder shaft speed slow while
extending and retracting
Engine runs but wood will not split, or
splits too slowly
Engine stalls during splitting wood
Engine will not turn or stalls under low
load
Leaking pump shaft seal
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. Small gear section damaged.
2. Pump check valve leaking.
3. Excessive vacuum in pump inlet.
4. Incorrect oil level.
5. Contaminated oil.
6. Directional valve leaking internally.
7. Internally damaged cylinder.
8. Overloaded cylinder.
1. Low horsepower/weak engine.
2. Overloaded cylinder
1. Engine/pump misaligned.
2. Frozen or seized pump.
3. Weak engine.
4. Hydraulic lines blocked.
5. Blocked directional valve.
1. Broken drive shaft.
2. Engine/pump misaligned.
3. Gear sections damaged.
4. Poorly positioned shaft seal.
5. Oil breather plugged.
1. Return unit to Sears service center.
2. Disconnect hydraulic hose, remove
shipping plugs, and reconnect hose.
3. Refer to adjustment section of this
manual and adjust the couplers
4. Correct engine/pump alignment.
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 that the 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.
3. Make certain that the 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, refill, make
certain oil return tube is below oil
level.
6. Return unit to Sears service center.
7. Return unit to Sears service center.
8. Do not attempt to split wood against
the grain.
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.
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.
3. Return unit to Sears service center.
4. Return unit to Sears service center.
5. Make certain reservoir is properly
vented.
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