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Idiomas disponibles
Idiomas disponibles
Maintenance and Servicing
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live electrical parts
the pump must be isolated by totally disconnecting the electrical supply. It is imperative that the unit cannot be re-started during
the maintenance operation.
Do not work a pump that is at its normal operating temperature as there is a danger from hot parts or hot lubricant.
1. Lubrication
Check the oil level regularly depending upon the operating hours. First oil change after 500 operating hours (see oil drain plug (K)). Further changes
every 500 operating hours. The oil change times should be shortened if the application is dusty.
Only oils corresponding to DIN 51 506 group VC / VCL or a synthetic oil (obtainable from Rietschle) should be used. The viscosity must corre-
spond to ISO-VG 100 according to DIN 51 519.
The recommended Rietschle Oil types are: MULTI-LUBE 100 (mineral oil); SUPER-LUBE 100 (synthetic oil) (see oil type plate (M)).
When the oil is under a high thermal load, e.g. ambient or suction temperatures over 30°C, unfavourable cooling or operating with increased
speed etc., the oil change time can be extended by using the recommended synthetic oil.
Old and used oil must be disposed of corresponding with the relevant health, safety and environmental laws.
If the oil brand is changed, the old oil must be drained completely from the oil separator housing.
2. Oil separation
Extremely blocked filter elements will result in an increased pump temperature and will cause discolouration of the lubricant.
The oil separator elements may become contaminated after a long period of operation which can result in high pump temperature and motor
overload. We therefore recommend that the the filter elements (L) be changed every 2000 operating hours. It is not possible to clean these
elements.
To change filters: Remove oil separator housing cover (Y). Remove plastic fixings and exchange the elements (L). If possible re-use the o-ring
for re-assembly. Re-assembly in reverse order.
3. Air filtration
The capacity of the pump can become reduced if the air inlet filters are not maintained correctly.
Filter on the suction side: (picture
Mesh filter of the 1. vacuum connection (A
contamination. Cleaning can be carried out by washing out or by blowing out with compressed air. Replace filters if contaminated completely.
The mesh filter can be dismantled by removing screws on the filter housings (X
Filter for Gas ballast: (picture
The VVB is equipped with a gas ballast valve (U). The built in filter cartridge must be cleaned regularly depending upon the amount of contamination.
By removing the screw (s) and plastic cap (h) the filter elements can be removed for cleaning. The filter cartridge (f) can be cleaned by blowing
out with compressed air. Re-assemble in reverse order.
4. Coupling (picture
)
The coupling rubbers (k) are wearing parts and should be checked regularly. When the coupling rubbers are worn this can be detected by a knocking
sound when the vacuum pump is started.
Defective coupling rubbers can cause extensive damage and even in some extreme cases break the rotor shaft.
To check the coupling, stop the motor (m) and isolate. Remove the screws (s
If the coupling rubbers (k) are damaged remove the circlips (l) from the coupling bolt (r) and exchange the coupling rubbers (k). Leave the spacer (p)
in place, check the coupling bolts (r) for any wear and replace if necessary. To replace remove fan cover (v
coupling and fan (v) complete from the pumpshaft, remove the nut (w) with washer (u) and
exchange the coupling bolts.
Re-assemble in reverse order.
)
) and 2. vacuum connection (A
1
)
) must be cleaned regularly depending upon the amount of
2
) bzw. (X
).
1
2
). Pull off the motor together with the motor side coupling half (q).
5
Gas ballast G
), remove the circlip (l
), pull off the
1
1
1
/
2
f
h
s
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