Richter RMA-B Series (ASME) - Manual (Page 18)

Series RMA-B close-coupled design Page 18
9475-055-en Revision 14
TM 8256 Edition 06/2011
7.7 Notes on assembly
Use original spare parts. See also Chapter 2.4.
Do not use defective parts.
Has the pump been shut down, drained and
flushed in accordance with the regulations?
See also Chapter 6.3.
Apply Anti-Seize special assembly paste (e.g. from
Weicon) to the fitting surfaces (not any stainless
steel surfaces) and screw thread prior to
assembly.
Check whether all parts fit and only then
assemble.
Important dimensions (centerings, bearing fits or
bearing play) are to be checked prior to assembly;
perform a trial assembly if required.
We recommend that the housing gasket 401 and
the shaft sleeve 523/1 be replaced during every
new assembly.
Always replace the circlip 932/7.
Remove metallic particles adhering to magnetic
components such as the inner magnet assembly
859 and the drive magnet assembly 858 prior to
assembly.
For this purpose simple plasticene can be used..
A complete assembly process is described in the
following.
Sub-sections can be deduced from this.
See also Chapter 7.5.
The following assembly dimensions must be
observed:
Dimension F
[inch] [mm]
Group 1 3.93 100
Group 2 4.33 110
Groups see Chapter 1.
Dimension F
End face of drive magnet assembly to contact surface
of adapter.
For safe assembly, it is advisable to check the
dimension F and the radial runout tolerance of 0.2
mm using a dial gauge.
Fig. 6
7.7.1 Table for target dimension Z
The plain bearings require a minimum axial play for
perfect functioning. This axial play "Z" must be
checked using the drawing Fig. 7 after completion of
assembly.
Size Dimension Z
inch (mm)
1,5"x1"x6"
…0.02 - 0.06
(0.5 - 1.5)
3"x1,5"x6"
3"x2"x6"
1,5"x1"x8"
3"x1,5"x8"
3"x2"x8"
4"x3"x8"
3"x2"x10"
Z : required axial play of the plain bearings.
Fig. 7
Z