Groundsmaster 4300--DHydraulic System Page 4 -- 40
Front Wheel Motor Efficiency Test
Figure 41
GEAR
PUMP
CROSSTRAX
MANIFOLD
BYPASS
PISTON
(TRACTION)
PUMP
VALVE
FROM STEERING CONTROLVALVE
TO LIFT CONTROL MANIFOLD
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
TO MOW CONTROL
(REAR CUTTING UNITS)
(FRONT CUTTING UNITS)
TO MOW CONTROL
RH FRONT WHEEL
MOTOR EFFICIENCY
TEST SHOWN
TESTER
CAP
CAP
Procedure for Front Wheel Motor Efficiency Test
NOTE: Over a period of time, a wheel motor can wear
internally. A worn motor may bypass oil internally, caus-
ing the motor to be less efficient. Eventually, enough oil
loss will cause the wheel motor to stall under heavy load
conditions. Continued operation with a worn, inefficient
motor can generate excessive heat, cause damage to
sealsandothercomponentsinthe hydraulic systemand
affect overall machine performance.
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter forinformation regardingthe importance of
removing contamination from the traction circuit.
NOTE: This test procedure includes steps to test both
front wheel efficiency together before testing individual
front wheel motors.
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
2. Make sure that traction pedal is adjusted to the neu-
tral position (see Operator’s Manual).
3. Park machine on a level surface with the cutting
decks lowered and PTO switch off. Shut engine off and
apply the parking brake.
4. Read Precautions For Hydraulic Testing in this sec-
tion.
