Front Wheel Motor Efficiency Test
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
TO MOW CONTROL
(FRONT CUTTING UNITS)
TO LIFT CONTROL MANIFOLD
TO MOW CONTROL
(REAR CUTTING UNITS)
GEAR
PUMP
BYPASS
VALVE
CROSSTRAX
MANIFOLD
TESTER
CAP
CAP
PISTON
(TRACTION)
PUMP
RH FRONT WHEEL
MOTOR EFFICIENCY
TEST SHOWN
FROM STEERING CONTROL VALVE
Figure 41
Procedure for Front Wheel Motor Efficiency Test
NOTE: This test procedure includes steps to test both
front wheel efficiency together before testing individual
front wheel motors.
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
sealsandothercomponentsinthehydraulicsystemand
affect overall machine performance.
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.
decks lowered and PTO switch off. Shut engine off and
apply the parking brake.
Park machine on a level surface with the cutting
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter for information regarding the importance of
removing contamination from the traction circuit.
4.
Read Precautions For Hydraulic Testing in this sec-
tion.
Hydraulic System
Page 4 -- 40
Groundsmaster 4300--D
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