Cattini YAK 1610, Operating And Maintenance Manual

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THE JACK DOES NOT LIFT THE LOAD.
A) Check the oil level B) There is dirt underneath the valves; , 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. C) Check the hydraulic block (1152), paying special attention that the
pistons (89) and (264), which controlopening and closing the descent valves, have not become rigid, in which case
dismantle them and grease them. D) Check that taps 2307 are in vertical position.
THE JACK LIFTS, BUT COMES DOWN UNDER THE LOAD.
A) Check that under the valves (40) and (83) of the assembly 1152 there are no dirty particles, 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 (KIT0265) complete with the pin (83).
THE PISTONS FAIL TO GO BACK IN COMPLETELY EVEN IF YOU ARE KEEPING THE
DESCENT BUTTON PRESSED
A) Check the air supply line is not pinched or restricted anywhere and that the gauge 2270, on the main control console,
reaches at least 8.5 bar. B) Check the depressor 2260 and that the piston 0138 is sliding smoothly: it’s good practice to
grease or lubricate it, unscrew and clean the silencer 0267 if necessary and screw it back down.
OIL LEAKS
A) If the jack expels oil from the silencer (1109), it means: the pumping element (2356) is scored or damaged and must
be replaced OR the seal (2127) is worn and must be replaced. B) Oil leaks from the suction pump (935): check for the
excess oil in the tank. C) If the oil leakage comes from the silencer (267) and the a.m. B) point is not the case, it’s
necessary to check hydraulic block (1152): replace the seals (0090 and 0026). If the leakage still persists, replace the
whole hydraulic block (1152).
TO LUBRICATE, USE ONLY MOLYBDENUM BISULPHIDE GREASE AGIP = CRSM MOBIL =
MOBILGREASE SPECIAL ESSO = BEACON Q 2 SHELL = RETINAX AM BP = LTX2 M
EN
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