Advertisement
• When the ram reaches maximum extension,
oil bypasses the lift cylinder through an
overload valve back into the oil reservoir,
protecting the jack from damage. This
bypass system also goes into effect when
the jack is overloaded (load exceeds 4,000
lbs) to protect the jack from damage and the
user from possible serious injury.
• Opening the release valve allows oil to
flow back into the reservoir. This releases
hydraulic pressure on the ram, which results
in lowering the saddle.
MAINTENANCE
Maintenance
To Add Oil:
• Position jack on the level ground and lower
the saddle.
• Remove the oil fill plug.
• Fill the oil reservoir until oil level is just over
the top surface of the inner cylinder. Replace
oil plug.
• Perform Air Purge Procedure described on
page 2.
To Replace Oil:
• Fully open release valve by turning handle
counterclockwise as far as it will go.
• Remove the oil fill plug. Turn the jack over
so that old oil will drain from the oil fill hole.
• Turn the jack back over after the oil has
drained. Refill through oil fill hole. Keep dirt
and other material clear when pouring. Fill
to just beneath lower rim of hole. Replace oil
fill plug.
• Perform Air Purge Procedure described on
page 2.
Lubrication:
• Add lubricating oil (WD-40) to all moving
parts when needed.
• For light duty use, lubricate every six
months.
• For heavy and constant use, lubrication is
recommended every month.
Rust Prevention:
• Check ram and pump plunger on the Power
Unit Assembly every two months (or sooner,
based on usage) for any signs of rust or
corrosion. Lift the jack as high as it goes
and look under and behind the lifting arm. If
signs of rust are visible clean as needed and
wipe down with with an oily cloth or cloth
sprayed with WD-40.
• When storing the jack, always have the
saddle and pump plunger in the down
postion.
ALWAYS USE A GOOD GRADE
HYDRAULIC JACK OIL. DO NOT USE
HYDRAULIC BRAKE FLUID, ALCOHOL,
GLYCERINE, DETERGENT, MOTOR
OIL OR DIRTY OIL. USE OF AN UN-
RECOMMENDED FLUID CAN CAUSE
DAMAGE TO YOUR JACK.
Storage:
Depress the spring lock to separate the
handle pieces.
Air Purge Procedure
During shipment, air may get into the
hydraulic system causing reduced lifting
performance. Perform Air Purge Procedure
described on page 2.
Oil filler plug
Oil filler hole
Proper oil lever
Ram all way in
Reservoir
Cylinder
5
PICTURE 3
Release valve
Pump plunger
Advertisement
