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Symptom
Jack will not lift load
Jack bleeds off
(starts to lower) after lift
Jack will not lower after
unloading
Poor lift performance
Wi'll' not lift to full
extension
PROBLEM-SOLVING
HINTS
Possible Causes
• Release valve not tightly closed
• Overloaded - too much weight on jack
• Release valve not tightly closed
• Too much weight on jack
• Hydraulic unit malfunction
• Oil reservoir overfilled
• Linkages binding
• Fluid level low
• Air trapped in system
• Fluid level low
Corrective
Action
• Ensure release valve is tightly
closed
• Reduce weight on jack
• Ensure release valve is tightly
closed
• Reduce weight on jack
i. Replace Power Unit Assembly
• Drain fluid to proper level
• Clean and lubricate moving parts
Ensure proper fluid level
With ram fully retracted, open release
valve, pump handle several times to
expel trapped air
• Ensure proper fluid level
MODEL NUMBER: 50239
The Model Number and Serial Number are
found on the lifting arm and handle socket
respectively.
Always mention the Model
Number and Serial Number when
requesting
service or repair parts for your
jack.
PARTS
ARE ONLY AVAILABLE
IN ASSEMBLIES
(except
Saddle)
Key
Parts NO.
1
6201
6202
6203
_,6204
_
"2_ 6205
6206__,_
--
6207
Description
'
•
',,
Saddle
!
\
\
Power unit ass-@mblyx V
Handle
Assembl_)]
Front Roller __J_
O(\_
Handle
Socket
_
Rear
Castor
Assembly
(_
@
\O pc_,-at_o rs manual
°_ _
®
FIG. 5
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