Testing The Wheel Motors Efficiency - Toro ProLine H800 Service Manual

Testing the Wheel Motors Efficiency

g292862
Hydraulic System: Testing the Hydraulic System
The wheel motor efficiency test evaluates the traction circuit performance.
Hydraulic fluid flow of 2.8 LPM (0.74 GPM) or more through a stationary rear
wheel motor under load indicates an internal leak in the wheel motor. Fluid
flow of 3.4 LPM (0.9 GPM) or more through a stationary front wheel motor
under load indicates an internal leak in the wheel motor. A worn wheel motor
is less efficient. Too much internal fluid bypass will cause the wheel motor to
stall under heavy load conditions. Continued use of a worn wheel motor will
generate excessive heat, causing damage to seals and other components within
the hydraulic system.
During the normal process of wheel motor operation, the rate of fluid flow through
the motor varies based on the rotating position of the wheel. For this reason, the
test procedure includes checking hydraulic flow through the motor after rotating
the wheel to 3 different positions to get multiple readings.
Figure 47
Page 5–38 ProLine H800
19241SL Rev A