GB
Form no.: L453147GB– revision 06/2013
7.
Service and maintenance
10.
Check the O-rings for signs of stiffness, lack of elasticity, brittleness
and/or chemical corrosion. Replace worn or damaged parts.
11.
Check the stationary ring (item 5.6) and rotary ring (item 5.7) for
signs of wear. Wear surfaces must be completely free of cracks. If
this is not the case, both the stationary ring and the rotary ring must
be replaced.
11a
In the case of water-flushed shaft seals and aseptic shaft seals,
check the rear seal rings (item 5.6, 5.7) for wear, and replace if
necessary.
12.
Fit the new o-rings on the stationary seal face and rotary seal face.
Caution!
Remember to moisten these with water.
13.
Fit the rotary seal face on the impeller without using tools.
Note!
The notch in the rotary seal face must be installed
so that it fits with the driving pin (item 5.8) in the
impeller hub.
13a
In the case of double mechanical shaft seals, also fit a rotary seal
face (item 5.7) with o-ring (item 5.5) in the location on the shaft –
again without using tools.
14.
Fit the stationary seal face in the back plate without using tools.
Note!
Install the stationary seal face so that it fits with
the pin in the back plate. Check that the stationary
seal face is positioned so that it slides back and
forth easily within the back plate.
14a
When fitting new double mechanical shaft seals, remove the drain
pipe (item 5.4) before fitting them in the pressure ring (item 5.9) or
back plate (item 7a, 7b).
* The W+50/600 pump is not equipped with a drain pipe.
15.
After fitting, clean the surfaces subject to wear.
15a
For double mechanical shaft seals, re-mount the back plate
(item 7a, 7b).
16.
Fit the impeller (item 4). Remember to use the proper tightening
torque.
M10:
45 Nm (33 ft-lb)
M14:
70 Nm (52 ft-lb)
M20:
200 Nm (148 ft-lb)
17.
Check that the locating pin (item 8) in the top of the back plate fits
with the detent in the pump body. To prevent damage to the O-ring,
carefully press the pump body (item 1a, 1b) in so that it covers the
O-ring (item 6). Then fasten the clamp ring (item 9).
Remember to use the proper tightening torque:
M10:
max. 35 Nm (25 ft-lb)
Checking parts for wear
Fitting
12
APV
