INSTALLATION
,
USE AND MAINTENANCE MANUAL
–
LC 300-420-580
REV
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
http://www.jurop.it
e-mail: info@jurop.it
Attenzione: get the valve back into the previously
“marked” position. Otherwise, the valve may
work improperly.
• The valve - in both its end stroke positions - must separate the air
flow sucked from the pump outlet air. The pump may be started in
order to check for the proper functioning.
• Lubricate the areas near the ferrule in order to guarantee the
lubrication of parts undergoing wear.
• Set the top cover back into place. Do not forget the OR-Ring
(P11). Fasten the 4 screws.
Replacing the vanes
• Remove the vacuum pump from its bearing frame and wash it
before disassembling.
• Drain the cooling liquid from the pump housing (pos. A).
• Remove the water pump cover (pos. B) and the carter (pos. C).
• Disconnect lubricating pipes (pos. D).
• Remove the lubricating pump (pos. E).
Pic. 6.6
• Remove the screws (pos. F) fixing the rear flange (pos. G) 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. F) by means of a dynamometric wrench
adjusted at 88 Nm.
• Refill the cooling system and re-install the pipeline.
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 automatic 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 protection cover;
- It is advisable to turn the screw of ¼ of turn and verify the actual
consumption.
Pic. 6.7
Do not reduce oil consumption below the value
indicated in par. 2.2 (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
approximately 40 - 80 g/h, depending on using conditions.
Replacing gear box components
• The pump with a 540 rpm gear box can be transformed into a
pump with a 1000 rpm gear box (and vice versa):
- Take down the gear box as illustrated. Remove also the drive shaft’s
pinion;
- Install the new pinion closing the nut;
- Mount the gear wheel including bearings and seals on the front cover,
properly aligning components. This housing may now be installed in the
gear box: fit the bearing in the internal housing on the flange;
- Properly engage gears, replace the cover’s gaskets to complete gear
replacement. Insert the parallel pin, which maintains the correct alignment;
• See picture below.