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Groundsmaster 5900/5910Hydraulic System Page 4 -- 34
Traction Problems
Problem Possible Causes
Machine operates in one direction only. System charge check valve and/or system relief valve
is defective.
Pilot direction valve in 4WD control manifold is
damaged or sticking.
Traction control potentiometer is faulty.
Traction pedal is sluggish. Traction control pedal assembly is stuck or binding.
Charge pressure is low.
Piston pump servo control valve is damaged.
Machine travels too far before stopping when the
traction pedal is released.
Traction control pedal assembly is binding or out of
adjustment.
Piston pump servo control valve is damaged.
Traction pedal does not return to neutral.
Traction power is lost or unit will not operate in either
direction.
Hydraulic reservoir oil level is low.
Brakes are applied or sticking.
Charge pressure is low.
Piston pump bypass valve is open or damaged.
Traction control potentiometer is damaged or
disconnected.
Four wheel drive will not engage. An electrical problem exists (see Chapter 5 -- Electrical
System).
Solenoid valve on 4WD control manifold is faulty.
Cartridge valve in 4WD control manifold is damaged or
sticking.
Four wheel drive will not disengage. An electrical problem exists (see Chapter 5 -- Electrical
System).
Solenoid valve on 4WD control manifold is faulty.
Cartridge valve in 4WD control manifold is damaged or
sticking.