13
Installation guide
Check valve
replacement
The following is the general procedure to change the check valve. These instructions show a 2 sections telescopic
jack but the procedure is the same no matter the number of sections.
1.
Lift the car up to have enough space to remove the entire section of the jack.
2.
When the car is held securely, close the main switches.
3.
Unscrew the bolt that holds the piston to the car.
4.
Open the manual valve until the piston is fully retracted. There should not be any pressure left
in the jack.
5.
Close the ball valve on the line leading to the jack to prevent any oil to come from the
reservoir.
6.
Install a chain block under the car, as centered as possible, and tie the chain around the head
of the section where the replacement should be.
7.
Remove the bleeder on the head just below and screw the 1/8” NPT fitting connected to a
hose. While lifting the upper sections, oil will be ejected through this hose. You can recuperate it in a
clean recipient.
8.
Lift the previously tied section until the stopper ring reaches the head with the hose. Then, lower the
sections of about one inch and unscrew this head. Once the head has been unscrewed, lift the sections
until you have enough room to remove the check valve.
9.
Remove the check valve by using a 15/16” or 3/4” socket. Some oil will come out this way; recuperate it
in a clean recipient.
