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COMPATIBLE OILS
ATF DEXRON IID
BLEEDING
If the motor works but fails to lift the load, check the oil level. If there is a shortage of oil, add some and then
bleed. To bleed off the air, pull out the plungers 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 is removed, it si necessary to check 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 QUALIFIED 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 cylinder 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), repeat 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 become 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 after 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; operate
the jack a couple of times without the load; bleed and then top up the oil level when the pistons are lowered.
4) The rams fail to go back in completely even with the lever in the descent position.
a) Check the suction-pump (1055) and check that the piston (138) slides well: it is a good idea to grease or
lubricate it; unscrew and, if necessary, clean the silencer (267), then screw it back down.
b) Carry out 3/b, but only in relation to the pistons.
5) Oil Leaks
a) If the jack expels oil from the silencer (719), it means:
the pumping element (705) is scored or damaged and must be replaced;
the seal (1002) is worn and must be replaced.
b) Oil leaks from the suction pump (1055): check for the excess oil in tank. If the jack is damaged, the leak will
soon stop; if the leak persists, replace the seals (90) and (26) of the hydraulic block (1052). If the leak still
persists, replace the whole unit (1052).
6) Other cases.
If the pistons lift up very slowly, check that the valve (843) between the tank and the motor pump is open.
/!\TO LUBRICATE, USE ONLY MOLYBDENUM BISULPHIDE GREASE
AGIP = CRSM MOBIL = MOBILGREASE SPECIAL ESSO = BEACON Q2
SHELL = RETINAX AM BP = LTX 2 M
REQUESTING SPARE PARTS
When ordering spare parts, the following must be specified: 1) lift model and serial number - 2) part number - 3)
part description - 4) quantity desired.
Reference is always made to the original copy in Italian.
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