Workman HDX Auto Page 7 − 25 Hydraulic System
Procedure for Lift Cylinder Internal Leakage Test
1. Shut off engine and engage parking brake.
CAUTION
Prevent personal injury and/or damage to equip
ment. Read all WARNINGS, CAUTIONS and Pre
cautions for Hydraulic Testing at the beginning o
this section.
2. Remove all pressure from lift cylinder by fully retract-
ing it (i.e. put hydraulic lift lever in LOWER position).
3. Read Precautions for Hydraulic Testing in this sec-
tion.
4. Disconnect hydraulic hose from base end of lift cylin-
der that is to be tested and install a steel plug with O−ring
seal in the hose (Fig. 21). Clean any remaining oil from
cylinder port.
5. Start engine and apply pressure to rod end of cylinder
(i.e. put hydraulic lift lever in LOWER position).
6. If any oil comes out of open cylinder port, cylinder has
an internal leak. Repair or replace cylinder.
7. When testing is complete, reconnect hose that was
disconnected in step 3.
8. Repeat test for second lift cylinder if necessary.
Disconnect and
plug this hose
ANY oil flow or droplets
from this fitting indicates
internal leak
Pressure is applied
to this port
Figure 21
Hydraulic
System
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