Maintenance Reserved To A Professionally Qua- Lified Engineer - WERTHER INTERNATIONAL W132B Bedienungsanleitungen

COMPATIBLE OILS
ATF DEXRON IID
BLEEDING
If the motor works but fails to lift the load, check the oil level. If there is a short -
age of oil, add some and then bleed.
To bleed off the air, pull out the plungers to their full extent. To their full extent
and then shut off the valve (843) located between the tank and the motor-pump.
Next, put the jack onto its side in the manner shown in the figure;
loosen the grub screw (541) and use your hands to close the pistons until only oil
is expelled from the grub screw hole (541); then tighten it. If the grub screw (541)
is removed, it is necessary to check that that the sealing ball is under the grub
screw by retightening. After this operation, check the oil level again and open the
valve (843).
Dwg. 19
MAINTENANCE RESERVED TO A PROFESSIONALLY QUA-
LIFIED ENGINEER
Having to carry out maintenance or overhauling, use exclusively genuine spare
parts to ensure the utmost reliability for the jack.
TROUBLESHOOTING
1) The motor will not start, or it runs badly.
a) Check that the air supply line is not choked.
b) The seals (760) are worn, replace them!
c) The seals (760) fitted on the piston (755) have difficulty in sliding: both the cyl -
inder and the ram have to be dismantled and lubricated.
2) The motor works but not lift the load.
a) Check the oil level by means of the screw (301).
b) There is dirt underneath the valves: remove the guard, close valve 843, turn
over the jack so that the cylinder is horizontal, loosen the cap (518), remove the
bearings and spring and blow inside, to thoroughly clean it.
Next, reassemble and if necessary knock the bearings again (40) and (521), re -
peat the bleeding operation illustrated on the previous page, place the jack in the
normal position and reopen the valve.
c) Check the hydraulic block (1052), paying special attention that the pistons (89)
and (264), which control opening and closing the descent valves, have not be -
come rigid, in which case dismantle them and grease them.
3) The jack lifts, but comes down under the load.
a) Dismantle the assembly (1052) and check that under the valves (40) and (83)
there are no impurities, then, after carefully cleaning, readapt the pin (83) in its
seat with a light blow with a hammer. If it is not possible to obtain a seal on the
pin, replace the valve (81) complete with the pin (83). If the load still falls even af -
ter fitting the jack, carry out the following step.
b) Completely drain the tank and the cylinder of oil, loosen the cylinder and
check the washer (1026); if it is damaged, replace it. Refit everything and tighten
the cylinder. Fill the oil tank with oil to the required level;
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