Toro Groundsmaster 360 Service Manual page 124

Test Procedure
Hydraulic System: Testing the Hydraulic System
Perform the lift cylinder internal leakage test if you identify a cutting deck raise
and lower problem. This test determines if the lift cylinder is damaged.
Note: The raise/lower circuit operation can be affected by the lift cylinder
binding, extra weight on the cutting deck, and/or binding of the lift components.
Ensure that these items are checked before continuing with the lift cylinder
internal leakage test.
1. Park the machine on a level surface with the PTO switch off, position the
cutting deck in a partially raised position, shut off the engine, and set the
parking brake.
2. Under both sides of the cutting deck, use a jack to raise the cutting deck
slightly. This removes the load from the lift cylinder and releases the lift
cylinder hydraulic pressure.
3. Support both sides of the cutting deck with jack stands to prevent the lift
cylinder from retracting.
4. Clean the area around the hydraulic hose end at the barrel end of the lift
cylinder. Disconnect the hydraulic hose from the lift cylinder barrel end fitting.
When capping the lift cylinder fitting and hydraulic hose end, use
a steel cap and plug to ensure that there is no fluid leakage. The
plastic plugs cannot hold the hydraulic pressure that is developed
during this test procedure.
5. Install a steel cap on the open lift cylinder fitting to seal the lift cylinder. Also,
install a steel plug in the open end of the disconnected hose to prevent
leakage or contamination.
g033411
1. Lift cylinder collar
6. Remove the jack stands from under the cutting deck.
Note: The cutting deck should settle slightly and then be supported by the
capped lift cylinder.
7. Place a piece of tape on the lift cylinder rod near the rod end
Measure and record the distance from the lift cylinder collar to the tape
location.
8. Keep the machine parked for 2 hours and monitor the lift cylinder. The weight
of the cutting deck can cause the lift cylinder to gradually retract. Use the
change in distance from the lift cylinder collar to the location of the tape to
determine the lift cylinder rod movement.
IMPORTANT
Figure 59
2. Tape
Page 4–66
(Figure 59).
Groundsmaster 360
16225SL Rev C