Lubrication; Oil Separation; Coupling - Rietschle RVM 25.3.000 Instructions De Service

2.6.2 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. Drain the oil
also from the oil cooler (R) (see oil drain plug (K
Only oils corresponding to DIN 51506 group VC / VCL or a syn-
thetic oil (obtainable from Rietschle) should be used. The vis-
cosity must correspond 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 suc-
tion 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 oil separator housing and the oil
cooler.
2.6.3 Oil separation (picture
Extremely blocked filter elements will re-
sult in an increased pump temperature and
will cause discolouration of the lubricant.
The oil mist separator (VCE 15/ 25) or oil separator
elements (VCE 40 - 100 and VCEH 100 - 250) may
become contaminated after a long period of opera-
tion which can result in high pump temperature and
motor overload. We therefore recommend to change
the oil mist separator (L
elements (L) every 2000 operating hours or when
the filter back pressure is in excess of 0.7 bar (see
back pressure gauge (Y)
possible to clean these elements.
VCE 15/ 25: Remove oil separator covers (t
change the oil mist separator (L
When refitting the oil mist separator (L
orientation.
(the air entry opening must be positioned at the top half of the pump → see
picture )
VCE 40 - 100 and VCEH 100 - 250: Remove oil separator covers (t
Remove plastic fixings (t) and exchange the elements (L). If possible re-use
the o-ring for reassembly. Re-assemble in reverse order.
When refitting the oil separator housing (size 5) check for cor-
rect orientation.
(as marked on the base on the housing)
2.6.4 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 ). Pull off the motor together with the motor side coupling half (q).
5
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
circlip (l ), pull off the coupling and fan (v) complete from the pumpshaft, remove the nut (w) with washer (u) and exchange the
1
coupling bolts.
Re-assemble in reverse order.
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optional extra). It is not
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) check for correct
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L
VCE
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VCEH
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- 5 -
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L
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L t
t
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L
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Y
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