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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 on a pump that is at its normal operating temperature as
there is a danger from hot parts or hot lubricant.
1. Air filtration (picture
)
The capacity of the pump can become reduced if the air inlet filters
are not maintained correctly.
The mesh filter (f) must be cleaned regularly depending upon the amount of
contamination. Cleaning can be carried out by washing out or by blowing out
with compressed air. Replace filters if contaminated completely.
The mesh filter (f) can be dismantled by removing screws (s
housing (D). Remove mesh filter (f). Re-assemble in reverse order.
2. Lubrication (picture
)
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- 2000 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 (ob-
tainable from Rietschle) should be used. The viscosity must correspond to
ISO-VG 46 according to DIN 51 519.
The recommended Rietschle Oil types are: MULTI-LUBE 46 (mineral oil);
SUPER-LUBE 46 (synthetic oil) (see oil type plate (M)).
When the oil is under a high thermal load, e.g. ambient or suction tempera-
tures over 30°C, unfavourable cooling or operating with increased speed
etc., the oil change time can be extended by using the recommended syn-
thetic 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.
3. Oil separation (picture
)
Extremely blocked filter elements will result in an increased pump temperature and will cause discolouration of the lubricant.
The oil mist eliminator element may become contaminated after a long period of operation which can result in high pump temperature and motor
overload. We therefore recommend that the oil separator element (L) is changed after every 2000 operating hours. It is not possible to clean these
elements.
To change separator: Remove exhaust cover (T) with gasket after unscrewing srews (s
Exchange the elements (L). If possible re-use the o-ring (L
4. Coupling (see picture
and E 159)
The coupling rubbers (65) are wearing parts and should be checked regularly. If the coupling rubbers are worn a knocking sound can be heard
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 and isolate. Remove the screws. Pull off the motor (69) together with the motor side coupling half (70). If
the coupling rubbers (65) are damaged, remove the circlips (66) from the coupling bolt (64) and exchange the coupling rubbers (65). Check the
coupling bolts (64) for any wear and replace if necessary. To replace, remove the fan cover (60), remove the circlip (10), pull off the coupling and
fan (62) complete from the pumpshaft, remove the nut (68) with washer (67) and exchange the coupling bolts.
Re-assemble in reverse order.
) on the filter
1
). Remove spring washer (L
2
) for re-assembly. Re-assemble in reverse order.
1
s
1
L
L
L
1
2
s
3
) after unscrewing screws (s
2
69
70
60
10
66
63
65
64
f
D
T
s
2
).
3
72
62
68
67
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