�-85
J......-
84
j
--83
-79 69 \
811:::
64
2�-
63
.l.-62
TROUBLESHOOTING
Symptom
77-
76/
24
25
\ <::i I
26
lV
'
23
27 �'
J.J
""'
29
"-.
1
------
(Fv®
30
�� \
\ �
28
X)
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
..... 78
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
___ 55
_54
-53
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 proper
fluid level
• Ensure proper fluid level
• Ensure vented oil filler plug let
pressurized reservoir air escape (see
Before Use)
15270 Flight Path Drive • Brooksville, FL 34604
www.esco.net • [email protected]
Phone (352) 754-1117 • Toll Free (800) 352-9852 US, Canada & Caribbean ONLY• Fax (352) 754-4508
