Toro Groundsmaster 360 Service Manual page 121

Test Procedure
Groundsmaster 360
16225SL Rev C
Perform the gear pump flow test if you identify a steering or cutting deck raise
and lower problem. This test determines if the hydraulic flow from the gear
pump is correct.
Note: Over a period of time, the gears and wear plates in the gear pump can
wear. A worn pump may bypass the hydraulic fluid and make the pump less
efficient. After sometime, sufficient fluid loss will occur and cause the cutting unit
motors to stall under heavy cutting conditions. Continued operation with a worn,
inefficient pump can generate excessive heat, cause damage to the seals and
other components in the hydraulic system.
1. Ensure that the hydraulic fluid is at normal operating temperature.
2. Ensure that the traction drive is correctly adjusted for the N
Before opening the hydraulic system, operate all the hydraulic
controls to release system pressure and avoid injury from the
pressurized hydraulic fluid; refer to
Hydraulic System (page
g036476
1. Transmission
2. Hydraulic hose
3. Park the machine on a level surface, lower the cutting deck, shut off the
engine, and set the parking brake.
4. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
5. Clean the junction of the hydraulic hose and lower fitting on the gear pump.
6. Disconnect the hydraulic hose from the lower fitting on the gear pump
57).
7. Install a hydraulic tester (pressure and flow) in series with the gear pump
fitting and disconnected hose. Ensure that the tester flow arrow points from
the pump outlet port and toward the disconnected hose. Ensure that the
flow-control valve on the tester is fully open.
CAUTION
Releasing Pressure from the
4–5).
Figure 57
3. Lower fitting
4. Gear pump
Page 4–63 Hydraulic System: Testing the Hydraulic System
position.
EUTRAL
(Figure