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No Hydraulic Functions
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Pilot enable/boom down switch at pilot lockout position
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Push switch to pilot enable position.
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Electrical circuit
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Push pilot enable/boom down switch to boom down position. If hydraulics work, check fuse. See your authorized dealer.
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Priority valve
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See your authorized dealer.
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Hydraulic system relief valve
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See your authorized dealer.
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Hydraulic pump control
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See your authorized dealer.
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Hydraulic pump
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See your authorized dealer.
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Slow Hydraulic Functions
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Cold oil
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Warm oil up.
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Slow engine speed
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See your authorized dealer.
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Suction line air leak
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Check for foamy oil.
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Low oil supply
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Add recommended oil. (See Fuels and Lubricants, Section 45.)
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Wrong oil viscosity
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Use recommended oil. (See Fuels and Lubricants, Section 45.)
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System relief valve malfunctions or misadjusted
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See your authorized dealer.
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Oil leaking past cylinders or control valve
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See your authorized dealer.
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Blocked or damaged line
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Inspect lines.
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Pilot control valve pressure low
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See your authorized dealer.
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Pilot control valve
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See your authorized dealer.
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Binding loader control valve spool
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Inspect valve.
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Leaking steering valve
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See your authorized dealer.
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| Symptom |
Problem |
Solution |
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Noisy Hydraulic Pump
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Low oil supply or wrong viscosity
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Fill reservoir with recommended oil. (See Fuels and Lubricants, Section 45.)
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Plugged or pinched suction line
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Clean or replace line.
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Air in oil
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Check for foamy oil. Tighten connections. See your authorized dealer.
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Loose or missing hydraulic line clamps
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Tighten or replace clamps.
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Hydraulic lines in contact with frame
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See your authorized dealer.
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Worn or damaged pump
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See your authorized dealer.
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Boom Float Function Does Not Work
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Boom float switch OFF
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Push switch to ON position.
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Low pilot control pressure
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Increase engine speed to fast idle. See your authorized dealer.
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Electromagnet in controller
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See your authorized dealer.
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Pilot control valve
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See your authorized dealer.
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Loader control valve spool binding in bore
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See your authorized dealer.
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One Hydraulic Function Does Not Work
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Pilot control valve
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See your authorized dealer.
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Stuck open circuit relief valve
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See your authorized dealer.
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Oil leaking past cylinder packings
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See your authorized dealer.
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Blockage in oil lines or valve
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See your authorized dealer.
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Loader control valve spool stuck in bore
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See your authorized dealer.
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| Symptom |
Problem |
Solution |
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Low Hydraulic Power
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Low relief valve setting
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See your authorized dealer.
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Low circuit relief valve setting
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See your authorized dealer.
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Leaking relief valve
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See your authorized dealer.
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Worn hydraulic pump
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See your authorized dealer.
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Pilot control valve
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See your authorized dealer.
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Function Drifts Down
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Leaking cylinders
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See your authorized dealer.
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Leaking seals in circuit relief valve or valve stuck open
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See your authorized dealer.
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Boom lower solenoid valve
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See your authorized dealer.
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Leaking loader control valve
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See your authorized dealer.
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Boom Down Does Not Work (Engine OFF, Key ON)
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Pilot enable/boom down switch not held in boom down (momentary) position
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Push and hold pilot enable/disable switch to momentary position as loader control lever is moved.
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Pilot enable/boom down fuse failed
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Replace fuse.
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Boom down solenoid
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See your authorized dealer.
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Pilot enable/disable switch
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See your authorized dealer.
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| Symptom |
Problem |
Solution |
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Hydraulic Oil Overheats (Machine Shifts to Low Speed Automatically)
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Low oil viscosity in hot weather
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Use recommended oil. (See Fuels and Lubricants, Section 45.)
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Excessive load
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Reduce load.
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Two-speed fan slow or not rotating
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See your authorized dealer.
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Cylinder leakage
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See your authorized dealer.
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Incorrect loader system relief or circuit relief valve setting
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See your authorized dealer.
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Restriction in oil lines or loader valve
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Inspect for dented or kinked lines.
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Leaking relief valve
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See your authorized dealer.
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Worn hydraulic pump (internal leakage)
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See your authorized dealer.
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Hydraulic Oil Foams
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Low oil level
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Add recommended oil. (See Fuels and Lubricants, Section 45.)
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Wrong oil
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Change to recommended oil. (See Fuels and Lubricants, Section 45.)
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Water in oil
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Drain oil from reservoir and cylinders. Fill with recommended oil. (See Fuels and Lubricants, Section 45.)
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Suction lines (air leak in system) loose or malfunction
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See your authorized dealer.
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Pilot Control Valve Leaking
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Leaking seals
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See your authorized dealer.
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