Purging Air From The Jack; Troubleshooting - Clarke strong-arm CBJ30 Operation And Maintenance Instructions

3. If below this, top up.
4. Do not overfill. Only use the correct type of oil such as Clarke hydraulic oil
(part number 3050830).
5. Replace the filler plug.
6. Check the jack for correct operation and purge any air from the system as
described below.

PURGING AIR FROM THE JACK

1. Turn the release valve counterclockwise one full turn to open.
2. Pump the handle eight full strokes.
3. Turn the release valve clockwise to close the valve.
4. Pump the handle until the ram reaches maximum height and continue to
pump several times to remove trapped air.
5. Turn the release valve counterclockwise one full turn and lower the ram to
its lowest position. Apply pressure if necessary.
6. Turn the release valve clockwise to the closed position and check for
correct operation. It may be necessary to perform the procedure more
than once to evacuate all the air.

TROUBLESHOOTING

Problem
Jack will not lift to full
height
Jack will not hold load Release valve not closing
Jack piston will not
lower
Jack feels spongy
when lifting
Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
Reason
Low oil level
Hydraulic oil contaminated
Pump valves not sealing
Cylinder ram binding
Cylinder ram binding
Parts warn
Internal damage
Lift arm linkage bent or
binding
Air trapped in the hydraulic
system
8
Solution
Check oil level
Speak to the Clarke
Service Department
Speak to the Clarke
Service Department
See air purging
procedure above