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Problem Solving - Craftsman 950156 Operator's Manual

Floor jack 4 ton capacity
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PROBLEM=SOLVING
HINTS
Symptom
Possible Causes
Corrective
Action
Jack will not lift load
• Release valve not tightly closed
• Ensure release valve is tightly closed
• Overloaded - too much weight on jack
• Reduce weight on jack
Jack bleeds off
• Release valve not tightly closed
• Ensure release valve is tightly closed
(starts to lower) after lift
• Hydraulic unit malfunction
• Replace power unit assembly
Jack will not lower after
• Oil reservoir overfilled
• Drain fluid to proper level
unloading
• Linkages binding
• Clean and lubricate
moving parts
Poor lift performance
. Fluid level low
• Ensure proper fluid level
. Air trapped in system
• With ram fully retracted, open
release valve and remove oil filler
screw, pump handle several times to
expel trapped air. Re-install oil filler
screw.
Will not lift to full
• Fluid level tow
° Ensure proper fluid level
extension
MODEL NUMBER: 50156
Not all components
of the
jack
are
replacement
items,
but are
illustrated
as a convenient
reference
of location
and
position
in the
assembly
sequence.
When
ordering
parts,
give
Model
number,
Serial
Number
and
parts
description.
The
Model
Number
and Serial
Number
are
found
on the
lifting
arm
and
handle
socket
respectively.
Key
Description
1
Saddle Assembly
2
Power Unit Assembly
3
Handle Assembly
4
Front Wheel Assembly
5
Handle Socket Assembly
6
Rear Castor Assembly
7
Tool Tray
8
Oil Filler Screw
--
Operators
Manual
--
Warning
Label
®
FIG.
6
':_
"'"_;,
!..... '
For after sale support and assistance:
Call 8:00 AM -4:45
PM CST., Monday-
Friday 1-888-332-6419

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