Wheel Motor Efficiency Test - Toro 30821 Service Manual

Wheel Motor Efficiency Test (Using Tester with Pressure Gauges and Flow Meter)
LOWER
PORT
TO GEAR PUMP SUCTION
THROUGH CASE DRAIN
NOTE: Over a period of time, a wheel motor can wear
internally. A worn motor may by- pass oil to its case drain
causing 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 seals and other components in the hydraulic
system, and affect overall machine performance.
Hydraulic System (Rev. G)
M5
TRACTION WHEEL
MOTORS
M4
DUMP
VALVE
3000 psi
TRACTION
RELIEF
100 to 150 psi
P3
PISTON PUMP
(HYDROSTAT)
FRONT WHEEL MOTOR TESTING SHOWN
TOP PORT
M6
UPPER
PORT
FROM HYDRAULIC
MANIFOLD (CHG) PORT
Figure 57
Page 4 - 40
High Pressure
Low Pressure
Return or Suction
Flow
Groundsmaster 3500- D