Toro ProLine H800 Service Manual page 125

Test Procedure
ProLine H800
19241SL Rev A
Note: When performing the lift cylinder internal leakage test, the cutting deck
should be attached to the lift arms and the cutting deck should be in raise position.
1. Park the machine on a level surface with the PTO switch off, shut off the
engine, and set the parking brake.
2. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
3. If necessary, remove the front wheel to get access to the lift cylinder; refer to
Removing the Wheels (page
4. Use a jack to support the raised the lift arm under the lift cylinder that is to
be tested. This will remove the load from the lift cylinder and relieve cylinder
hydraulic pressure. Leave the jack under the lift arm for support and to
prevent the arm from lowering.
5. Clean the area around the end of the hydraulic hose at the rod end of the
lift cylinder for the supported lift arm. Disconnect the hydraulic hose from
the lift cylinder rod end fitting.
When capping lift cylinder fitting and hydraulic hose end, use a steel
cap and plug to ensure that the fluid leakage will not occur. Plastic
plugs will not hold hydraulic pressure that will be developed during
this test procedure.
6. Place 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.
7. Slowly lower the jack and remove it from under the lift arm. The cutting deck
should settle slightly and then be supported by the capped lift cylinder.
8. The capped lift cylinder should be able to support the cutting deck long
enough for the machine to move from one cutting area to another during
operation.
9. If the lift cylinder allows the cutting deck to lower too quickly, replace the lift
cylinder; refer to Lift Cylinder (page
10. Once the condition of the lift cylinder is determined, use a jack to raise the lift
arm slightly to remove the load from the cylinder.
11. Support the lift arm with jack stands to prevent it from lowering.
12. Remove the cap from the cylinder fitting and the plug from the hydraulic hose.
13. Connect the hydraulic hose to the lift cylinder fitting.
14. Carefully remove the jack from under the lift arm.
15. If removed, install the wheel onto the machine; refer to
(page 7–4).
16. Start the engine and operate the lift cylinders through several up and down
cycles. Shut off the engine and check for any leakage.
17. If necessary, repeat the steps
18. Check and fill the hydraulic tank with the correct quantity of new hydraulic
fluid before returning the machine to service.
7–3).
IMPORTANT
5–109).
4 through 16
Page 5–57 Hydraulic System: Testing the Hydraulic System
Installing the Wheels
for other lift cylinders.