Use and Care Manual

4
Operation
Jack operation is controlled either manually or
by external air pressure. To operate manually,
insert the handle (61) into the handle socket
(60). To operate by air pressure, connect the air
valve (29) to an external air pressure source.
Clean the air connections and lubricate air motor
prior to assembly.
To raise the jack, turn the release valve (49)
clockwise until it is tight, and either manually
pump with the handle, or press the lever on the
air valve (29) if connected to an air supply.
To lower the jack, turn the release valve (49)
counterclockwise slightly and very slowly. Do not
turn valve too quickly or more than twice.
When lowering the jack, do
not turn release valve too quickly or turn the
valve more than twice. This can cause the
load to descend too rapidly creating a
dangerous situation.
Maintenance
Maintain oil at full level. To check the oil,
proceed as follows:
1. With the jack in an upright position and the
ram completely retracted, open the release
valve (49) by turning it counterclockwise.
2. Unscrew and remove the filler plug (31). The
oil level should be just up to the hole.
3. If necessary, fill with clean hydraulic jack oil.
4. Re-install the filler plug (31).
With the release valve (49) open, manually
pump the handle six times. This will keep
internal components lubricated.
To prevent corrosion, occasionally lubricate the
handle socket pivot point (60), release valve
screw thread (49), and air valve (29), with a light
coat of oil.
Troubleshooting the AHJ Bottle Jack
Trouble Probable Cause Remedy
Erratic Action.
Air in hydraulic system.
Bleed air by opening release valve (49).
Pump for 20 seconds.
Viscosity of oil is too high. Change to a lower viscosity oil.
Internal leakage in ram (37).
Replace worn packing. Look for excessive
contamination or wear.
Ram does not advance.
Release valve (49) is open. Close release valve (49).
Low or no oil in reservoir.
Fill reservoir with oil and bleed air from
system.
Air locked in system.
Bleed air by opening release valve (49).
Pump for 20 seconds.
Load is above capacity. Use correct equipment rated for that load.
Ram does not extend or
only partially.
Low oil level in reservoir.
Fill reservoir with oil and bleed air from
system.
Pump plunger (57) is binding.
Look for dirt, gummy deposits, leaks,
misalignment, worn parts, or defective
packing.
Ram advances slowly.
Low air pressure. Adjust air pressure to 90 to 145 psi.
Leaking seals. Replace seals.
Ram advances but does
not hold load.
Release valve (49) is open. Close release valve (49).
Ram seals are leaking. Replace seals.
Ram will not retract, or
retracts slowly.
Release valve (49) is closed. Open release valve (49).
Reservoir is too full. Drain oil to correct level.
Ram damaged internally.
Take jack to authorized service center for
repair.