Toro Groundsmaster 4500-D Series Service Manual page 172

Procedure for Deck Motor Case Drain Leakage Test (continued)
Hydraulic System: Testing
g308391
1. Flow IN
2. Flow OUT
3. Disconnect pressure return hose from the motor to be tested
Install tester with pressure gauge and flow meter in series with the motor and
the disconnected return hose. Make sure the flow control valve on tester
is fully open.
4. Disconnect the motor case drain hose (small diameter hose) where it
connects to bulkhead fitting at the frame rail (not at the motor). Put a steel
cap on the bulkhead fitting; leave the case drain hose open.
Cutting deck blades will rotate when lowered with PTO switch in
ON position. Keep away from cutting decks during test to prevent
personal injury from rotating blades. Do not stand in front of the
machine during test.
5. Sit on seat and start the engine. Increase engine speed to high idle speed.
Engage cutting decks.
6. While watching tester pressure gauge, have second person slowly close flow
control valve on tester until a pressure of 83 bar (1200 PSI) is obtained.
Note: Use a graduated container, special tool TOR4077, to measure case
drain leakage.
7. Have a second person measure flow from the case drain line for fifteen (15)
seconds, then disengage the cutting decks and stop the engine. Record
test results.
TEST RESULTS: Case drain leakage less than 662 ml (22.4 ounces) of
hydraulic fluid in fifteen (15) seconds (0.7 GPM / 2.7 LPM)
8. If case drain flow is more than 662 ml (22.4 ounces), the deck motor is worn
or damaged and should be repaired or replaced.
9. When testing is complete, disconnect tester from motor and hose. Reconnect
hose to the deck motor. Remove cap from bulkhead fitting and reconnect
case drain hose.
10. Repeat test for additional motors if required.
1
3
Figure 81
3. Case drain
CAUTION
Page 5–70
(Figure 81).
Groundsmaster ® 4500-D/4700-D
19245SL Rev A