Operation (Cont.)
LOWErInG
Keep hands, feet, and clutter clear of
ground area before lowering the load.
Raise load high enough to clear
vehicle stands, then SLOWLY open the
release valve by turning handle knob
counterclockwise.
IMPOrtAnt:
Avoid shock loads
created by quickly opening and closing
the release valve as the load is being
lowered. Shock loads can create
dangerously high operating pressures
within the hydraulic system, causing
system failure and resulting in personal
injury and/or property damage.
Maintenance
IMPOrtAnt:
Use only a good grade
hydraulic jack oil such as Mobil DTE
13M or equivalent. Avoid mixing types
of oil. Do not use hydraulic brake fluid,
alcohol, glycerine, detergent motor oil, or
dirty oil. Improper fluid can cause serious
internal damage to the jack rendering it
inoperative.
ADDInG OIL
1. Position the jack on level ground and
fully lower the saddle. Remove oil filler
plug/screw.
2. Fill oil to within
3
/
8
” of filler hole.
DO NOT OVERFILL! If overfilled,
the jack will not lower to published
minimum height. If underfilled, the
jack will not reach published maximum
height. Adjust fluid level as needed.
Always reinstall oil filler plug/screw
before use.
CHAnGInG OIL
1. Remove oil filler plug/screw.
2. Turn jack over and drain old oil out
through oil filler hole.
NOTE: Dispose of hydraulic oil in
accordance with local regulations.
3. Refill with new oil until within
3
/
8
” of filler
hole.
IMPOrtAnt:
Do not allow dirt or other
foreign material to enter the hydraulic
system when filling.
4. After refilling, remove air from system
by opening release valve and rapidly
pumping handle several times.
Reinstall oil filler plug/screw when done.
LUBrICAtIOn
1. Add lubricating oil to all moving parts as
needed.
2. Apply grease to greasing nipple
periodically.
3. On air models 1ZKX9, 5M455A and
5M456A, pour air tool lubricant into
the air supply inlet at air control valve
periodically.
PrEvEntInG rUSt
1. Check ram and piston periodically for
signs of corrosion. Clean as needed
with an oily cloth.
2. When not in use, store jack with saddle
and piston fully retracted.
2
Westward Operating Instructions and Parts Manual
Westward Hydraulic Service Jacks
®
1ZKX4, 1ZKX5, 1ZKX6, 1ZKX9, 5M455A and 5M456A
troubleshooting Chart
Jack will not lift load
1. Release valve not tightly closed
1. Ensure release valve tightly closed
2. Overload condition
2. Remedy overload condition
3. Pressure of air supply is too low
3. Change to a suitable air source
(for air models)
Jack will lift but not maintaining pressure
1. Same as above
1. Same as above
2. Hydraulic unit malfunctioning
2. Replace
Jack will not lower after unloading
1. Reservoir overfilled
1. Drain fluid to proper level
2. Linkages binding
2. Clean and lubricate moving parts
Poor lift performance
1. Fluid level low
1. Ensure proper fluid level
2. Air trapped in system
2. With ram fully retracted, remove oil
filler plug to let pressurized air
escape, reinstall oil filler plug
Will not lift to full height
Fluid level low
Ensure proper fluid level
Symptom
Possible Cause(s)
Corrective Action
