7 Servicing/Maintenance
55 of 84
Amarex N
2563.84/08-EN
7.5.2 Reassembling the pump section
7.5.2.1 Installing the mechanical seal
Observe the following to ensure trouble-free operation of the mechanical seal:
▪
The shaft surface must be absolutely clean and undamaged.
▪
Immediately before installing the mechanical seal, wet the seal faces with a drop
of oil.
▪
For easier installation of the bellows-type mechanical seal, wet the inside
diameter of the bellows with soapy water (not oil).
▪
To prevent any damage to the rubber bellows, place a thin foil (of approximately
0.1 to 0.3 mm thickness) around the free shaft stub.
Slide the rotating assembly over the foil into its installation position.
Then remove the foil.
ü
The shaft and rolling element bearings have been properly fitted in the motor.
1. Slide drive-end mechanical seal 433.01 onto shaft 210 and secure it with circlip
932.01.
2. Insert O-rings 412.03 into intermediate casing 113 and push the intermediate
casing into bearing bracket 330 up to the stop.
3. Slide pump-end mechanical seal 433.02 onto shaft 210.
For special mechanical seals with covered spring, tighten the socket head cap screw
at the rotating assembly before fitting the impeller. Observe installation dimension
"A".
A
Fig. 27:
Installation dimension "A"
Table 23:
Installation dimension A
Pump size
Installation dimension "A"
[mm]
All sizes
29
7.5.2.2 Fitting the impeller
7.5.2.2.1 Fitting impeller type S and cutter
NOTE
For bearing brackets with tapered fit make sure that the tapered fit of impeller and
shaft is undamaged and installed free from grease.
1. Slide impeller 230 onto the shaft end.
2. Insert grooved pin 561 into impeller 230.
3. Place impeller body 23-7 on the centring hub.
4. Insert impeller screw 914.04 and tighten it to a torque of 30 Nm.
5. Fasten ring 500 in the suction cover with screws 914.06.
Summary of Contents for Amarex N series
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