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Machine Does Not Move-Fast or Slow Idle
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FNR switch in neutral
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Put FNR switch in forward or reverse as necessary.
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Return/suction filter in bypass mode
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Change filter.
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Monitor message appears on monitor display
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See your authorized dealer.
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Machine Does Not Move-Fast Idle
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FNR switch
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Put FNR switch in forward or reverse as necessary.
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Park brake engaged
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Release park brake.
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Low oil level
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Add oil.
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Park brake fuse
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Check fuse.
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Park brake switch
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See your authorized dealer.
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Brake switch
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See your authorized dealer.
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Neutral charge relief valve
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See your authorized dealer.
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FNR switch
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See your authorized dealer.
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Pump directional control valve
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See your authorized dealer.
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Charge pump installed incorrectly
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See your authorized dealer.
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Charge pump
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See your authorized dealer.
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Hydrostatic motor
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See your authorized dealer.
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Hydrostatic pump
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See your authorized dealer.
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Machine Does Not Move-Slow Idle
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Control pressure regulating valve
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See your authorized dealer.
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Pressure override valve
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See your authorized dealer.
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| Symptom |
Problem |
Solution |
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Machine Moves in One Direction Only
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FNR switch
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See your authorized dealer.
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Directional control
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See your authorized dealer.
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High pressure relief valve
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See your authorized dealer.
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Machine Drives Erratically
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Control pressure regulating valve
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See your authorized dealer.
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Motor displacement control valve
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See your authorized dealer.
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Pressure override valve
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See your authorized dealer.
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Machine Moves in Wrong Direction
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Wires between from FNR switch and directional control valve switched
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See your authorized dealer.
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Cannot Find or Hold Neutral
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Directional control valve
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See your authorized dealer.
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Servo piston
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See your authorized dealer.
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Hydraulic Oil Overheats (Machine Shifts to Low Speed Automatically)
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Two-speed fan slow or not rotating
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See your authorized dealer.
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Clogged oil cooler
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See your authorized dealer.
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Display shows "OPEn" with overheat indicator on; speed sensor is not functioning properly.
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See your authorized dealer.
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Oil cooler bypass valve
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See your authorized dealer.
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High pressure relief valves
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See your authorized dealer.
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Pressure override valve
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See your authorized dealer.
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Operating charge relief valve
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See your authorized dealer.
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Slow Acceleration-Fast Deceleration
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Motor rate-of-shift orifice installed backward
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See your authorized dealer.
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| Symptom |
Problem |
Solution |
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Lack of Power or Sluggish
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Low oil level
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Add oil.
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Engine fast idle speed set too low
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See your authorized dealer.
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Service or park brakes dragging
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See your authorized dealer.
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Neutral charge relief valve
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See your authorized dealer.
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High pressure relief valve
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See your authorized dealer.
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Charge pump
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See your authorized dealer.
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Pressure override valve
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See your authorized dealer.
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Pump or motor leakage
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See your authorized dealer.
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Motor stuck at minimum displacement (high speed position)
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See your authorized dealer.
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Motor minimum displacement screw
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See your authorized dealer.
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Excessive Power Train Noise (Under Load or No Load)
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Too low engine slow idle
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See your authorized dealer
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Low oil level
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Add oil.
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Worn parts or damaged power train
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See your authorized dealer.
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Damaged drive dampener
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Inspect drive dampener.
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Drive line or park brake
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Inspect drive line and park brake.
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Foaming Oil
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Incorrect type of oil
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Change oil. (See Maintenance-Every 1000 Hours, Section 85.)
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High oil level
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Hydraulic reservoir overfilled or hydraulic pump seal leaking.
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Low oil level
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Add oil. (See Maintenance-Every 1000 Hours, Section 85.)
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Air leak on suction side of pump
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Check oil pickup tube on inside of power train.
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Oil Ejected from Breather
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Too much oil in reservoir
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Check level. Remove some oil.
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