REPLACING THE VANES
• Remove the vacuum pump from its bea
ring frame and wash it before disassembling.
• Disconnect the lubricating piping. Remove the screws fixing the rear flange 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 damaged.
• Lubricate with oil the new vanes before inserting them inside each groove of the rotor.
• Reinstall all components in the following order: rear flange, seal ring (non), bearing, compensation
ring, gasket and flange with lubricating pump (we recommend the pivot-key be correctly fitted onto
the shaft groo
ve).
WARNING
Do not damage
components during
assembly by forcing them
exceedingly. Do not flip the
seal ring during rotation of the
shaft. Do not leave foreign
objects inside the pump.
ADJUSTING THE SELF-LUBRICATING PUMP
The autom
atic lubricating pump is adjusted by the manufacturer
before the shipping. If consumption noticeably differs from the
indicated value, adjust it as follows:
• Remove the upper protection cover.
• Using a screwdriver and a 10 mm wrench, adjust the adjusting
screw (K). Close the nut and remount the upper prot
ection
cover. It is advisable to turn the screw of ¼ of turn and verify
the actual consumption.
• We recommend turning the adjusting screw by a
¼ turn and
then check the actual vacuum pump consumption.
Do not reduce oil consumption below the value indicated in par.
“Performances” (for functioning at speeds different from the
maximum, flow is proportionate to rotating speed).
½ turn of the adjusting screw causes a variation in the flow
of appr. 40 - 80 g/h, depending on using conditions.
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