Replacing the hydraulic pump
Replace the hydraulic pump if:
•
system oil pressure is abnormally low
•
pump operation is unstable
•
pump is excessively noisy
Expect oil spillage with this service. When factory floor
drains must be oil-free, install a barrier to block oil.
Limit oil spillage by using drip pans, plugging each line
and port, and allowing a generous drip time.
CAUTION
If replacing the hydraulic pump because a catastrophic
hydraulic pump failure contaminated the hydraulic oil
system, see Cleaning a contaminated oil system.
Service steps
WARNING
Place the main electrical disconnect in the OFF
position and bleed down all high-pressure lines.
Place an Out of Service tag on the main electrical
disconnect and lock it out. Failure to do so can result in
equipment damage or injury to personnel.
1. Shut down the system.
2. Drain the reservoir.
44 | M-390 © Flow International Corporation
HYPERJET™ 94i-S AND 94i-D PUMPS
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