Toro Groundsmaster 7210, Service Manual

Page: 115 / 342

Perform the lift cylinder internal leakage test if you identify a cutting deck (or
implement) 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 (or implement), and/or binding of the
lift components. Ensure that these items are checked before continuing with
the lift cylinder internal leakage test.
Test Procedure
1. Park the machine on a level surface with the PTO switch off. Position the
cutting deck (or implement) in a partially raised position and shut off the
engine. Set the parking brake.
g033410
Figure 51
1. Lift cylinder
2. Barrel end hose
2. Under both sides of the cutting deck (or implement), use a jack to raise the
cutting deck (or implement) slightly. This removes the load from the lift
cylinder and releases the lift cylinder hydraulic pressure.
3. Support both sides of the cutting deck (or implement) 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
(
Figure 51 ).
IMPORTANT
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.
Groundsmaster 7210 Page 4–55 Hydraulic System: Testing the Hydraulic System
16222SL Rev C