Elmo Rietschle R-VWP 500/1000/1500/2500 - Manual (Page 24)

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Maintenance and repair
VWP 500 - 1500
The coupling rubbers (Fig. 8/k) are subject to wear
and und must be checked regularly (at least once
a year). You can tell when the coupling rubbers are
worn by a knocking noise when the pump starts up.
CAUTION
Defective coupling rubbers
Defective coupling rubbers may lead to the rotor
shaft breaking.
To check the coupling switch the motor (Fig. 8/m)
off and ensure that it cannot be switched on again.
After unscrewing the allen screws (Fig. 8/s
1
) pull off
the motor (Fig. 8/m) together with the motor side
coupling half (Fig. 8/q) and suspend with the lifting
device. After unscrewing the allen screws (Fig. 8/s
2
)
remove the motor fl ange (Fig. 8/n). If the coupling
rubbers (Fig. 8/k) are damaged remove the circlips
(Fig. 8/l) from the coupling bolt (Fig. 8/r) and ex-
change the coupling rubbers (Fig. 8/k). Leave the
spacer (Fig. 8/p) in place.
Checking and changing the coupling bolts (Fig. 8/r):
Unscrew countersunk screw (Fig. 8/s
3
) and remove
with disc (s
4
). Pull off the driven coupling (Fig. 8/q
1
)
with a suitable puller. Remove the nut (Fig. 8/w) with
washer (Fig. 8/u) and exchange the coupling bolts.
ACHTUNG
Frequent start up and high ambient tempera-
ture
The service life of the coupling rubber (Fig. 8/k) is
reduced by this.
Re-assemble in reverse order.