Service Manual

Rev. J
Greensmaster 3250--D
Hydraulic System (Rev. I)
Page 4 -- 49
Procedure for Reel Motor Case Drain Flow
Test
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximatelyten
(10) minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface with the cutting
units lowered. Make sure engine is off and the parking
brake is engaged.
CAUTION
Before continuing further, read and become fa-
miliar with Precautions for Hydraulic Testing.
3. Forthesuspectedbadreelmotor,disconnectreturn
hose from motor. The return hose is connected to the
rear fitting on the reel motor.
4. Install tester with pressure gauge and flow meter in
series with the reel motor and the disconnected return
hose. Make sure the flow control valve on the tester
is fully open.
5. Ifabacklapkitisinstalled,makesurebacklapknob
onthehydraulicmanifoldisinthemowpositionandreel
speed is set to maximum.
6. Disconnect hose from case drain of the motor to be
tested at the bulkhead fitting.
A. Plug the bulkhead port.
B. Leave the case drain hose from the motor open
and place open end of disconnected hose into a
drain pan.
7. One person should sit on the seat and operate the
machine while a second person measures case drain
leakage. Make sure functional control lever is in NEU-
TRAL. Start engine and move the throttle to full speed
(2750 +
50 RPM).
CAUTION
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
8. Engage reels by positioning the functional control
levertoMOW position.Whilewatchingpressuregauge,
slowly close flow control v alve onthe testeruntil a pres-
sure of 1000 PSI (69 bar) is obtained.
9. After achieving 1000 PSI (69 bar), place discon-
nected motor case drain hose into a container gra-
duatedinouncesormilliliters(e.g.Toro#TOR4077)and
collect hydraulic fluid for 15 seconds. After 15 sec -
onds, remove hose end from container.
10. Disengage cutting units by positioning functional
control lever to NEUTRAL position. Open control valve
on tester and stop the engine.
11. Identifyamountofoil collected in the container. Re-
cord test results.
12. If flow was greater than 16.0 ounces (473 millili-
ters)(.5GPM/1.9LPM),repairorreplacethereelmotor
as necessary.
13. Disconnect tester from motor and return hose. Re-
connect hose to the motor.
14. Removeplugfrombulkheadfitting.Reconnectcase
drain hose to the bulkhead fitting.
15. Test other reel motors as needed.
Figure 20
Hydraulic
System