Section 15: Hydraulic Trouble Shooting Guide - Yard Machines 550 Operator's Manual

SECTION 15: HYDRAULIC TROUBLE SHOOTING GUIDE

Trouble Possible Causes
Cylinder rod will Broken drive shaft.
not move Shipping plugs left in
hydraulic hoses.
Set screws in coupling not
adjusted properly.
Loose shaft coupling.
Gear sections damaged.
Damaged relief valve.
Hydraulic lines blocked.
Incorrect oil level.
Damaged directional valve.
Blocked directional valve.
Slow cylinder Gear sections damaged.
shaft speed while Excessive pump inlet
extending and vacuum.
retracting Slow engine speed.
Damaged relief valve.
Incorrect oil level.
Contaminated oil.
Directional valve leaking
internally.
Internally damaged cylinder.
Engine runs but Small gear section
wood will not damaged.
split, or wood Pump check valve leaking.
splits too slowly Excessive pump inlet
vacuum.
Incorrect oil level.
Contaminated oil.
Directional valve leaking
internally.
Overloaded cylinder.
Internally damaged cylinder.
Engine stalls Low horsepower/weak
during engine.
splitting Overloaded cylinder.
Engine will not Engine/pump misalignment.
turn or stalls Frozen or seized pump.
under low load Low horsepower/weak
conditions engine.
Hydraulic lines blocked.
Blocked directional valve.
Leaking pump Broken drive shaft.
shaft seal Engine/pump misalignment.
Gear sections damaged.
Poorly positioned shaft seal.
Plugged oil breather.
Corrective Action
Return unit for authorized repair.
Disconnect hydraulic hoses, remove shipping plugs, reconnect hoses.
See operator's manual for correct adjustment.
Correct engine/pump alignment as necessary. See operator's manual.
Return unit for authorized repair.
Return unit for authorized repair.
Flush and clean hydraulic system.
Check oil level.
Return unit for authorized repair.
Flush and clean hydraulic system; return unit for authorized repair.
Return unit for authorized repair.
Make certain pump inlet hoses are clear and unblocked-use short, large
diameter inlet hoses.
Return unit for authorized repair.
Return unit for authorized repair.
Check oil level.
Drain oil, clean reservoir, refill, make certain oil return tube is below oil
level.
Return unit for authorized repair.
Return unit for authorized repair.
Return unit for authorized repair.
Return unit for authorized repair.
Make certain pump inlet hoses are clear and unblocked; use short, large
diameter inlet hoses.
Check oil level.
Drain oil, clean reservoir, refill, make certain oil return tube is below oil
level.
Return unit for authorized repair.
Do not attempt to split wood against the grain.
Return unit for authorized repair.
Return unit for authorized repair.
Do not attempt to split wood against the grain. If engine stalls repeatedly,
take unit for authorized repair.
Correct alignment as necessary. See operator's manual.
Return unit for authorized repair.
Return unit for authorized repair.
Flush and clean hydraulic system.
Flush and clean hydraulic system; return unit for authorized repair.
Return unit for authorized repair.
Correct alignment as necessary. See operator's manual.
Return unit for authorized repair.
Return unit for authorized repair.
Make certain reservoir is properly vented.
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