When replacing the vanes proceed as follows:
• Remove the vacuum pump from its bearing frame
and wash it before disassembling.
• Drain the cooling liquid from the pump housing (1)
• Remove the water pump cover (2) and the carter
(3)
• Disconnect lubricating pipes (4).
• Remove the lubricating pump (5).
• Remove the screws (6) fixing the rear flange (7)
and use the two threaded holes to remove the
flange – bearing – seal housing. If necessary,
hold the rotor by inserting a wooden block,
protecting the internal bearings from damage.
• Remove the bearing from the rear flange and
replace the seal if broken.
• Lubricate with oil the new vanes before inserting
those inside each groove of the rotor.
• Reinstall all the components in the following
order: rear flange, seal ring (non), bearing,
compensation ring, gasket and flange with
lubricating pump (we recommend to fit correctly
the pivot-key on the shaft groove).
• Tighten the nuts (pos. 6) by means of a dynamometric wrench adjusted at 88 Nm.
• Refill the cooling system and re-install the pipeline.
CAUTION
Do not damage components during assembly by forcing them
exceedingly. Do not flip the seal ring during rotation of the shaft. Do not
leave objects inside the pump.
The automatic lubricating pump is adjusted by the manufacturer before the
shipping. If consumption is different from the indicated value, adjust as
follows.
• Remove the upper protection cover.
• Using a screwdriver and a 10 mm wrench, adjust the adjusting screw
(K). Close the nut and put back the upper protection cover.It is
advisable to turn the screw of ¼ of turn and verify the actual
consumption.
Do not reduce oil consumption below the value indicated in the
“Performance” paragraph (for functioning at speeds different from
the maximum, flow is proportionate to the rotating speed).
½ turn of the adjusting screw causes a flow variation of about 40 -
80 d/h, depending on using conditions.
REPLACING VANES
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