Deck Motor Efficiency Test - Toro GroundsmasterR 4300-D Service Manual

Deck Motor Efficiency Test

(Using Tester with Pressure Gauges and Flow Meter)
MOW CONTROL
MANIFOLD
NOTE: Over a period of time, a deck motor can wear in-
ternally. A worn motor may bypass oil to its case drain
causing the motor to be less efficient. Eventually,
enough oil loss will cause the deck motor to stall under
heavy cutting conditions. Continued operation with a
worn, inefficient motor can generate excessive heat,
cause damage to seals and other components in the hy-
draulic system and affect quality of cut.
NOTE: One way to find a faulty deck motor is to have
another person observe the machine while mowing in
dense turf. A faulty motor will run slower than other mo-
tors, produce fewer clippings and may cause clip marks
(a choppy appearance) on the turf.
Hydraulic System
Install tester in series
between fitting and return
hose at motor outlet.
TESTER
CAP
Disconnect case drain
hose at traction deck
bulkhead
MEASURING
CONTAINER
Figure 49
Page 4 - - 48
ROTATION
DIRECTION
MOTOR
INLET
CASE DRAIN
#5 (RH FRONT) DECK MOTOR
EFFICIENCY TEST SHOWN
Procedure for Deck Motor Efficiency Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
2. Determine which deck motor is malfunctioning.
3. Park machine on a level surface with the cutting
decks lowered and PTO switch off. Make sure engine is
off and mow speed limiter is in the mow position. Apply
the parking brake.
4. Read Precautions For Hydraulic Testing in this sec-
tion.
MOTOR
OUTLET
Groundsmaster 4300--D