Testing The Lift Circuit - Lift Cylinder Internal Leakage - Toro Sand Pro 3040 Service Manual

Testing the Lift Circuit – Lift Cylinder Internal Leakage
Test Procedure
Hydraulic System: Testing the Hydraulic System
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Lift Circuit – Lift Cylinder Internal Leakage Test
Perform the lift cylinder internal leakage test if you identify an attachment lift or
lower problem. This test determines if the lift cylinder being tested is damaged.
When performing the lift cylinder internal leakage test, the attachment should be
attached to the hitch assembly.
The raise/lower circuit operation can be affected by the lift cylinder binding, extra
weight on the attachment, and/or binding of the hitch components. Ensure that
these items are checked before performing the lift cylinder internal leakage test.
Note: On model 08743 machines, the relief valve for the lift circuit is part of a
remote manifold located near the lift valve. On model 08745 machines, the relief
valve for the lift circuit is integrated into the steering control valve.
1. Park the machine on a level surface, raise any attachments, engage the
parking brake, and set the key switch to the O
2. Use a jack to support the attachment and prevent it from lowering. This
removes the load from the lift cylinder and relieves the lift cylinder hydraulic
pressure.
3. Clean and disconnect the hydraulic hose and fitting at the rod end of the lift
cylinder; refer to Figure
Figure 42
43.
Page 5–46
position.
FF
Sand Pro ® 3040 and 5040
20251SL Rev A