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Lowering
!
WARNING: Check that all tools and personnel are clear before lowering load. Maintain control of speed at
which load descends at all times.
1. Press the "UP" air control valve lever to raise post locking pin away from cap plate.
2. Ensure the vehicle is still stable, then remove lift post locking pin.
3. Press the "DOWN" air control lever to exhaust air pressure. Vehicle will gradually lower.
4. Discharge the air pressure from the jack fully once the vehicle is on the ground.
5. Ensure saddle is fully lowered, remove jack from under the vehicle and store properly.
TROUBLESHOOTING
Symptom
Jack will not lift load
Jack will not hold load
Jack does not lift smoothly
MAINTENANCE
The Air Jack/Support Stand is best operated with an in-line oiler. If using the
jack without an oiler, complete the following steps before each use, or every
hour is used continuously:
1. Disconnect the jack from the air hose.
2. Apply a few drops of good quality pneumatic tool oil through the air line.
Inspections should be made before each use of jack, checking for abnormal
conditions. Regular inspections should be made weekly for daily use and
monthly for intermittent use.
1. Inspect air hose for leaks or kinks. Replace if necessary.
2. Air control valve should operate freely. Wheels should rotate freely.
3. The post should extend and retract smoothly throughout its full range. If jack does not lift smoothly, remove bolts
around cylinder cover, remove cover and lift piston weld assembly to the piston stops. Tilt the assembly to clear
the piston stops. Clean and lubricate using multi-purpose lithium based grease.
4. A periodic coating of light lubricating oil to all rotating and sliding portions of the jack will help to prevent rust and
assure that the wheels move freely.
5. Lower the saddle to its lowest position when not in use.
6. When jack is not in use, tip it forward until it rests on the wheels and use extra support to hold the jack as shown
in Figure 3. This allows trapped water to drain from inside the cylinder.
Possible Causes
• Inadequate air supply
• Overload condition
• Air line leaks
• Locking pin not engaged
• Cylinder requires lubrication
5
Corrective Action
• Ensure adequate air supply
• Use larger capacity jack
• Locate and seal leaks
• Engage locking pin
• Apply multi-purpose lithium
based grease to cylinder wall
(see MAINTENANCE)
Figure 3
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