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4
6#
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The following chart lists malfunctions which may occur during equipment operation, followed im-
mediately by possible cause and possible solution. These are not all inclusive but are designed to
help isolate the problem and should be checked before calling the factory Service Department.
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)$6
36
• Check Capacity Chart.
• Engage PTO.
• Check and fill as required.
• Drain tank and hose and remove blockage.
• Replace as required.
• See Pump Service Manual.
• Adjust relief.
• Clean relief.
• Check PTO ratio, pump size and engine
speed for proper oil flow.
• Check and fill as required.
• Remove and clean.
• Readjust to proper setting.
• Replace bad part.
• Change filter.
• Ajust linkage so valve has full throw.
• Adjust or clean as required.
• Reduce engine speed, slow cycle time to
cool oil or add oil cooler option.
• Warm oil or use less viscous oil.
• Check lines; clean and repair as necessary.
• Replace valve.
• Check Capacity Chart and reduce load.
• Torque bearing mounting bolts.
• Tighten bolts.
• Replace worn parts or adjust gearbox
spacing.
• Operate controls smoothly.
• Clean or replace counterbalance valves not
set at 600 psi.
• Check for no pressure in brake pilot line
when turn is in neutral.
• Replace worn brake parts or shim brake to
proper torque.
• Bleed air from brake with bleed screw on
side of brake.
• Load too heavy.
• PTO not engaged.
• Low hydraulic fluid supply.
• Suction line blocked.
• Broken hydraulic pressure line.
• Defective hydraulic pump.
• Incorrect relief valve setting.
• Relief valve sticking.
• Pump not operating at proper speed.
• Low hydraulic fluid supply.
• Relief valve sticking.
• Relief setting too low.
• Worn pump, motor or cylinder.
• Plugged filter.
• Valve spools not fully open.
• Boom holding valves out of adjustment.
• Oil temperature too high.
• Hydraulic oil too cold or dirty.
• Line restricted.
• Internal control valve crack.
• Load too heavy.
• Loose turntable bearing.
• Loose swing gearbox mounting bolts.
• Worn gears or bearing.
• Operator control of lever too erratic.
• Motor counterbalance valves dirty or not
set properly.
• Brake not holding properly.
• Brake releasing at wrong time or erratically.
Reference Only
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