Rietschle VWP 500 Instructions De Service page 8

m
l k p
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 pump is started.
Defective coupling rubbers can cause extensive damage and even in some extreme cases break the piston shaft.
After unscrewing the allen screws (s
remove the motor flange (n). 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.
Checking and changing the coupling bolts (r): Unscrew countersunk screw (s
suitable puller. Remove the nut (w) with washer (u) and exchange the coupling bolts.
Re-assemble in reverse order.
Trouble Shooting
1. Motor starter cuts out Roots pump:
1.1 Check that incoming voltage and frequency corresponds with the motor data plate.
1.2 Check the connections on the motor terminal block.
1.3 Incorrect setting on the motor starter.
1.4 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per IEC 947-4).
2. Insufficient suction capacity:
2.1 Protection mesh (f) obscured.
2.2 Suction pipe work is too long or too small.
3. Pre-pump does not reach ultimate vacuum:
3.1 Check for leaks on the suction side of the Roots pump or on the system.
4. Roots pump operates at an abnormally high temperature:
4.1 Ambient or suction temperature too high.
4.2 Cooling air flow is restricted.
5. Sealing oil degrades rapidly:
5.1 Change sealing rings and the wearing sleeve of the shaft feedthrough (see under "servicing").
6. Roots pump emits abnormal noise:
6.1 The coupling rubbers are worn (see under "servicing").
6.2 Contamination of the piston.
Solution: Clean pumping chamber and piston.
Appendix:
Repair on Site: For all repairs on site an electrician must disconnect the motor so that an accidental start of the unit cannot happen.
All engineers are recommended to consult the original manufacturer or one of the subsidiaries, agents or service agents. The address of the
nearest repair workshop can be obtained from the manufacturer on application.
After a repair or before re-installation follow the instructions as shown under the headings "Installation and Initial Operation".
Lifting and Transport: To lift and transport the Roots pump the eye bolts on the pump
(VWP 500) resp. M 12 (VWP 1000/ 1500) in the planned tapped holes (X)
(see picture ).
The weight of the pumps is shown in the accompanying table.
Storage: The Roots pump must be stored in dry ambient conditions
with normal humidity. We recommend for a relative humidity of over
80% that the pump should be stored in a closed container with the
appropriate drying agents.
Disposal: The wearing parts (as listed in the spare parts lists) should
be disposed of with due regard to health and safety regulations.
Spare parts lists: E 199
E 200
q s n
2
s s q
3 4 1
r
u, w
) pull off the motor (m) together with the motor side coupling half (q). After unscrewing the allen screws (s
1
VWP 500
VWP 500 / 1500
X
s
1
) and remove with disc (s
3
. For it must be screwed 2 eye bolts M 10
must be used
VWP
Noise level (max.)
dB(A)
Sound power
Weight (max.)
Length
Width
Height
Oil capacity
f X
). Pull off the driven coupling (q
4
500 1000
50 Hz 79 80
60 Hz 83 86
60 Hz - 90
kg 100 180
mm 871 931
mm 317 420
mm 260 370
l 1,5 3,5
)
2
) with a
1
1500
82
87
92
225
1058
420
370
3,5
9.2000 / PM6