Richter MNKA Series (ASME) User Manual download pdf (Page 19)

Series MNKA, acc. to ASME Page 19

9250-050-en Revision 11

TM 7903 Edition 07/2010

7.8 Assembly

7.8.1 Assembly of the bearing pedestal,

long life grease lubrication

 Press both radial ball bearings 321/1 und 321/2

onto the drive shaft

213.

 Insert key 940/1 into the drive shaft.

 Install pre-assembled drive shaft into the bearing

pedestal

330 from the motor side.

 Insert wavy spring washer 953/1 into the bearing

pedestal

330.

 Mount rear bearing cover 361 with hex. socket

screws

914/2.

 Mount support bracket 183 (with group 2) with hex.

screws

901/2 and tooth lock washers 936/2.

7.8.2 Assembly of the bearing pedestal,

oil bath lubrication

 Press both radial ball bearings 321/1 and 321/2

onto the drive shaft

213.

 Insert rotary shaft seal 421/2 into the bearing

pedestal.

 Insert key 940/1 into the drive shaft.

 Install pre-assembled drive shaft into the bearing

pedestal

330 from the motor side.

 Insert wavy spring washer 953/1 into the bearing

pedestal

330.

 Insert cover gasket 403 into the bearing pedestal.

 Insert rotary shaft seal 421/1 into the rear bearing

cover

361.

 Mount rear bearing cover 361 with hex. socket

screws

914/2.

 Mount support bracket 183 (with group 2) with hex.

screws

901/2 and tooth lock washers 936/2.

7.8.3 Drive magnet assembly

 Clamp the pre-assembled bearing pedestal 330 on

the shaft end in the vice so that the carrier groove

is facing upwards.

 Mount the drive magnet assembly 858 onto the

drive shaft so that the driver cams engage.

 Screw in hex. socket screw 914/1 with tooth lock

washer

936/1. Secure thread with a drop of Loctite,

for example. For tightening, a hex. socket key with

120 mm minimum length is required.

 Screw bearing pedestal 330 / lantern 344 together

with hex. socket screws

901/4.

7.8.4 Assembly of can unit

 Introduce can insert into the can (containment

shell). If this is not possible, cool can (containment

shell) insert to approx. 41 °F (5 °C).

 Place intermediate ring 509/1 in the lantern 330.

 Insert the entire unit into the lantern 344.

7.8.5 Perform trial assembly of the plain

bearing pedestal with impeller,

inner magnet assembly and plain

bearings

 Without adhesive

 Without O-ring 412/3.

 Install bearing bushes 545/1 and 545/2 and press

in firmly.

 Push on bearing sleeve 529/1 on the impeller side

and install this unit in the plain bearing pedestal

339. Make sure that the cams of the anti-torsion

insert engage properly in the impeller.

 Push distance ring 504 and bearing sleeve 529/2

onto the pump shaft.

 Push inner magnet assembly 859 onto the pump

shaft.

 Permit the anti-torsion cams of the pump-side

bearing sleeve

529/1 to engage in the grooves of

the impeller.

 Screw on inner magnet assembly 859 together

with the bearing sleeve and tighten.

7.8.6 Checking bearing play Z and

impeller distance X

The distances X, Y and Z are indicated in the works

certificate.

X: Distance behind the impeller

Y: Distance in front of the impeller

Z: Axial play of the plain bearings

 Press inner magnet assembly towards the

impeller.

 Measure distance X

behind the impeller.

 Press impeller towards the motor.

 Measure distance X

behind the impeller.

Z = X

- X

Are the values correct?

These values must be checked after final assembly.

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Richter MNKA Series (ASME) User Manual Page 19

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