12
SOLUTIONS
in motions
Holeless telescopic jack
Maintenance
program
Monthly verification
Verify the seals
Verify the oil level
Verify the oil quality
Verify if there are leaks on the line
Note
If the seals need to be replaced often, the surface of the piston should be carefully inspected as it can be
damaged, wearing the seals prematurely.
Annual verification
Verify the line strainers
Verify the piston surface
Seal replacement
1.
Lift the cabin up high enough to be able to remove the heads.
2.
When the cabin is held securely, turn off the main switch.
3.
Unscrew the bolts located above the piston.
4.
Open the manual valve (gate valve) until the jack is completely collapsed; there should be no pressure in the jack.
5.
Shut off the manual valve (gate valve) to the jack so the oil remains in the reservoir.
6.
Open the bleeder on each head.
7.
Disconnect the oil recuperator.
8.
To facilitate the installation of the heads, mark with a pencil initial position of the head with a line on the head and
on the piston.
9.
Remove the heads by using two chain vise-grips.
10.
Unscrew (CCW) the head while holding the piston with the other chain vise-grip.
11.
It is important to put electric tape on the threads of the tubes to prevent damaging the seals when you put them in.
12.
Unscrew the brass gland, remove the old joints, put the new ones and lubricate abundantly.
13.
Screw back the gland to the maximum without letting any gap between the gland and the head.
14.
Re-install the heads and tighten them up to the pencil mark.
15.
Bleed the air in the jack, following the steps described in the venting the synchronized telescopic jack section shown
previously
16.
Re-install the hose to recuperate the oil on the straight or 90° coupling
Note
Pay special care to O’rings.
