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Westward Operating Instructions and Parts Manual
Westward Telescoping Hydraulic
Bottle Jacks
®
5M451A and 5M463A
Operation (Continued)
4. Operate jack handle until saddle
contacts load.
Off center loads
and loads lifted
while jack is not level may damage the
jack or cause personal injury.
5. Raise load to desired height and
immediately transfer load to jack
stands.
LOWERING
IMPORTANT:
Avoid “shock loads”
created by quickly opening and closing
the release valve as load is being
lowered. This may result in an
overloading of the hydraulic circuit
and possible damage to the jack.
1. Insert handle onto release valve and
slowly turn handle counterclockwise
no more than one full turn.
2. Push handle sleeve down manually
if still extended to reduce piston
exposure to rusting.
Maintenance
IMPORTANT:
Use only a good grade
hydraulic jack oil (Mobil DTE 13M or
equivalent), avoid mixing types of oil.
Do not use brake fluid, alcohol,
glycerin, detergent motor oil, or dirty
oil. Improper fluid can cause serious
internal damage to the jack rendering
it inoperative.
ADDING OIL
1. With saddle fully lowered and
piston depressed, set jack in its
upright level position and remove
oil filler plug.
2. Fill until oil is level with or just
below filler plug hole.
CHANGING OIL
1. For best performance and longest
life, replace the complete oil supply
at least once a year.
2. To drain oil completely, remove the
oil filler plug.
3. Lay the jack on its side and allow the
oil to run out into suitable drain pan.
Dispose oil in accordance with local
regulations.
4. Replace with proper oil as described
above.
LUBRICATION
Add lubricating oil to all pivoting
sections every 3 months.
RUST PREVENTION
Check ram and piston for signs of rust
on a regular basis. Clean as needed
with a lint free, oil saturated cloth.
STORAGE
When not in use, always leave the
saddle and pump piston all the way
down.
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
Jack bleeds off after lift
1. Release valve not tightly closed
1. Ensure release valve tightly closed
2. Hydraulic unit malfunctioning
2. Replace hydraulic unit
Jack will not lower after unloading
1. Reservoir overfilled
1. Drain oil to proper level
2. Linkage binding
2. Clean and lubricate moving parts
Poor lift performance
1. Oil level low
1. Ensure proper oil 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
1. Oil level low
1. Ensure proper oil level
Symptom
Possible Cause(s)
Corrective Action
