Groundsmaster 4300--DHydraulic System Page 4 -- 48
Deck Motor Efficiency Test
(Using Tester with Pressure Gauges and Flow Meter)
CASE DRAIN
MOW CONTROL
MANIFOLD
MEASURING
CONTAINER
ROTATION
DIRECTION
MOTOR
OUTLET
MOTOR
INLET
TESTER
CAP
Install tester in series
between fitting and return
hose at motor outlet.
Disconnect case drain
hose at traction deck
bulkhead
TO RESERVOIR
#5(RHFRONT)DECKMOTOR
EFFICIENCY TEST SHOWN
Figure 49
NOTE: Overa 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 toseals and othercomponents in thehy-
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.
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.
