Service Manual

Rev. A
Groundsmaster 360 Hydraulic SystemPage 4 - 29
Traction Circuit Problems (Continued)
Problem Possible Causes
Wheel motor will not hold load in
neutral.
NOTE: Machine may not be
completely stationary if parked on an
incline without the parking brake
engaged.
Make up fluid from charge pump is not available.
Check valves in transmission are damaged.
On 4WD machine, PD1 or PD2 cartridge in CrossTrax
TM
AWD control
manifold is leaking or is damaged.
Valve plate(s) in transmission is worn or damaged.
Cylinder block assembly in transmission is worn or damaged.
Single wheel motor turns while
unloaded, but slows down or stops
when load is applied.
Transmission bypass valve(s) is open or leaking.
Wheel motor is worn or damaged.
Transmission components (e.g. piston pump, relief valve, check valve)
for the problem wheel motor are worn or damaged.
NOTE: If one traction circuit component has internal wear or damage, it
is possible that other traction components are also damaged.
Machine does not track straight.
NOTE:If 2WD machine does not track
straight, look for problem with
components that effect the lagging
traction side of the machine.
External traction control linkage is misadjusted, disconnected, binding
or damaged.
Steering cylinders are not synchronized preventing front and rear
wheel alignment (synchronize steering cylinders by turning in one
direction a nd holding until all wheels stop turning).
Steering components are out of adjustment or are damaged.
Brake is dragging or binding.
Verify the steering forks do not touch the over rotation stop bolts at full
turn in both directions. Maintain a 1/8” gap between the steering forks
and stop bolts; contact with the stop blot prevents normal steering
system purge and proper wheel alignment.
Transmission bypass valve(s) is open.
Air m ay be trapped in the hydraulic syst em; resolve by turning the
steering wheel over relief several times in both directions.
Transmission check valve is not seating or is damaged.
Transmission or wheel motor(s) is worn or damaged.
On 4WD machines, steering home sensor may be out of adjustment.
Hydraulic
System