Toro Groundsmaster 3280-D Service Manual page 157

Test Procedure
Groundsmaster ® 3280-D/3320
05138SL Rev B
Note: When performing the lift cylinder internal leakage test, the cutting deck
should be attached to the lift arms.
g225791
1. Cylinder barrel end fitting
2. Hydraulic hose
1. Park the machine on a level surface with the PTO switch off, shut off the
engine, and set the parking brake.
2. For the lift cylinder that is to be tested, use a jack to raise the lift arm slightly.
This removes the load from the lift cylinder and releases the lift cylinder
hydraulic pressure.
3. Support the lift arm with jack stands to prevent it from lowering.
4. Clean the area around the hydraulic hoses end at the barrel end of the lift
cylinder. Disconnect the hydraulic hoses from the lift cylinder barrel end
fitting (Figure 74).
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.
6. Raise the lift arm slightly with a jack and remove the jack stand, then lower
and remove the jack.
7. 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.
8. If the lift cylinder allows the cutting deck to lower too quickly, replace or repair
the lift cylinder; refer to the
9. Once the lift cylinder condition is determined, use a jack to raise the lift arm
slightly which removes the load from the lift cylinder.
10. Support the lift arm with jack stands to prevent it from lowering.
Figure 74
3. Hydraulic hose
4. Lift cylinder
IMPORTANT
Lift Cylinder (page
Page 5–73 Hydraulic System: Testing the Hydraulic System
5–110).