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Workman HD Series Page 9 − 33 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
of this section.
2. Remove all pressure from cylinder by fully retracting
it (i.e. put hydraulic lift lever in LOWER position).
3. Disconnect hydraulic hose from base end of cylinder
and install a steel plug with O−ring seal in the hose (Fig.
25). Clean any remaining oil from cylinder port.
4. Start engine and apply pressure to rod end of cylinder
(move hydraulic lift lever to LOWER position).
5. If any oil comes out of open cylinder port, cylinder has
an internal leak. Repair or replace cylinder.
6. Reconnect hose after testing is complete.
Disconnect and
plug this hose
ANY oil flow or droplets
from this fitting indicates
internal leak
Pressure is applied
to this port
Figure 25
Hydraulic
System