Certa CTTJCK2000A, User Manual, Page: 6 / 16

Other checks prior to first use
Purging the air
Air can sometimes make its way into the hydraulic cylinder which will prevent the trolley jack
from pumping properly. This may happen during transit and shipping, or from long periods
of storage. If this has occurred, the air will need to be removed.
To purge the air, follow the steps below.
1.
Turn the handle anti-clockwise with one full turn to open the release valve.
2.
Using the handle, pump fully eight times.
3.
Turn the handle clockwise to close the release valve.
4.
Pump the handle until the hydraulic cylinder reaches its maximum height and
continue pumping several times to remove the trapped air inside the cylinder.
5.
Slowly pinch the oil plug to release the trapped air.
6.
Turn the handle anti-clockwise with one full turn to open the release valve and lower
the hydraulic cylinder to its lowest position. It may be necessary to apply force to the
head cap to lower the cylinder.
7.
Turn the handle clockwise to close the release valve and check the trolley jack can
pump properly.
Note:
It may be necessary to perform this procedure more than once to ensure the air
has expelled completely.