Craftsman 247.79452 - Manual (Page 18)

TROUBLE-SHOOTING
Problem Possible Cause Corrective Action [
Cylinder rod will no( 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 biocked.
8. Incorrect oil level.
9. Damaged or blocked directional
valve.
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
Cylinder shaft speed slow 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. 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, refill, make
certain oil return tube is below oil
level.
7. Return unit to Sears service center.
8. Return unit to Sears service center.
Engine runs but wood will not split, or
splits too slowly 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. 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 sen/ice center.
8. Do not attempt to split wood against
the grain.
Engine stalls during splitting wood 1 . Low horsepower/weak engine.
2, Overloaded cylinder
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.
Engine will not tu rn or stalls u nder low
load
1. Engine/pump misaligned.
2. Frozen or seized pump.
3. Weak engine.
4. Hydraulic lines blocked.
5. Blocked directional valve.
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
Leaking pump shaft seal 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. 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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