Filter
Top Products
Groundsmaster 4000--D/4010--D Hydraulic SystemPage 4 -- 59
Procedure for Cutting Deck Motor Case
Drain
Leakage
Test
NOTE: Overa period of time,a deck motor can wear in-
ternally. 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 deck motor to stall under
heavy cutting conditions. Continued operation with a
worn, inefficient motor can generate excessive heat,
cause damage toseals and other components in thehy-
draulic system and affect quality of cut.
NOTE: Onemethodtofindafailingormalfunctioning
deck motor is to have another person observe the ma-
chine while mowing in dense turf. A bad motor will run
slower, produce fewer clippings and may cause a differ-
ent appearance on the turf.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
1. Park machine on a level surface with the cutting
decks lowered and off. Make sure hydraulic oil is at nor-
mal operating temperature, engine isoff and theparking
brake is applied.
NOTE: The side deck motors are connected in series.
To isolatea faulty sidedeckmotor, both motorsin thecir-
cuit may have to be tested by starting with the left side
motor first.
2. Disconnect hose from return of the motor to be
tested (Fig. 40). Install tester (flow and pressure) in se-
ries with the motor and disconnected return hose. Make
sure the flow control valve on tester is fully open.
3. Disconnect the motor case drain hose (small diame-
ter hose) where it connects to hydraulic manifold tee fit-
ting (notat the motor). Puta steel cap onthe fitting atthe
tee fitting; leave the case drain hose open.
CAUTION
Cutting deck blades will rotate when cutting
decks are lowered with PTO switch in ON posi-
tion. Keep awayfrom cutting decksduring testto
prevent personal injury from rotating blades. Do
not stand in front of the machine.
4. Siton seatand starttheengine. Withenginerunning,
increase engine speed to high idle speed and release
the parking brake. Engage the cutting decks.
5. While watching pressure gauge, slowly close flow
control valve on tester until a pressure of 1200 PSI (83
bar) is obtained.
NOTE: Use a graduated container, special tool
TOR4077, to measure case drain leakage (Fig. 41).
6. Have a second person collect the f low from the case
drain line for 15 seconds, then move the PTO switch to
OFF and stop the engine (Fig. 41). Record test results.
TEST RESULTS: Flow less than 22.4 ounces (662
ml) (0.7 GPM/2.6 LPM) of hydraulic fluid in 15 sec-
onds.
7. If flow is more than 22.4 ounces (662 ml) (0.7
GPM/2.6 LPM)in 15 seconds, themotor isworn or dam-
aged and should be repaired or replaced.
8. After testing is completed, disconnect tester from
motor and hose. Reconnect hose to the deck motor. Re-
move capfrom teefitting and reconnect case drainhose
to tee fitting.
1. Deck motor (RH shown)
2. Return hose
3. Case drain hose
Figure 40
1
3
2
Figure 41
Hydraulic
System