Service Manual

TEST NO. 4: Lift Cylinder Internal Leakage Test.
1. Remove all pressure from cylinder by fully retracting
it (e.g. put hydraulic dump lever in LOWER position).
Disconnect and
plug this hose
ANY
oil flow or droplets
2. Shut of engine and engage parking brake.
3. Disconnect hose from base end of cylinder and install
a steel plug with o–
ring seal in the hose. Clean any re-
maining oil off of cylinder port.
4. Start engine and apply pressure to rod end of cylinder
(e.g., put hydraulic dump lever in LOWER position).
from this fitting indicates
internal leak
Pressure is applied
to this port
5. If any oil comes out of open cylinder port, cylinder has
an internal leak. Repair or replace cylinder.
6. Reconnect hose disconnected in step 3 after test or
Figure 15
repairs are complete.
Hydraulic System Page 9
– 16 Workman 3000/4000 Series