81-
TROUBLESHOOTING
Symptom
Possible Causes
Application will not extend, move
• Overload condition
or respond to pressurized fluid
• Release valve not closed
Application responds to
• Overload condition
pressurized fluid, but system
• Release valve not closed
does not maintain pressure
• Hydraulic unit malfunction
• Malfunctioning coupler,
damaged application
Application will not return fluid to
• Reservoir overfilled
pump (i.e. cylinder will not
retract)
Application will not
fully
extend
• Fluid level low
(cylinder or spreader)
• Fluid level low
• Air trapped in system
Poor performance
-4-
-57
-56
__ ss
_..54
-53
-52
-51
64
21'�63
J.-62
6
\
Corrective Action
• Remedy overload condition
• Ensure release valve closed
• Remedy overload condition
• Ensure release valve closed
•
Secure load by other means.
Open
release valve.
depressurize
pump and
hose, remove coupler and/or
application, then renew or replace
•
Secure load by other means.
Open
release valve,
depressurize
pump and
hose, remove application, then drain
fluid to proper level
• Follow
Symptom 3 procedure
for
securing load, depressurizing pump,
remove application, then ensure prope1
fluid level
• Ensure proper fluid level
• Ensure vented oil filler plug let
pressurized reservoir air escape (see
Before Use)
