Richter RMA Series - Manual (Page 19)

Series RMA
Page 19
9475-050-en Revision 12
TM 7978 Edition 08/2010
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, the
cover gasket 403 (oil bath lubrication) and the
shaft sleeve 523/1 be replaced during every new
assembly.
The circlip 932/7 must always be replaced.
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 Section 7.5.
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. 6 after completion of
assembly.
Fig. 6
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.
7.8 Assembly
A complete assembly process is described in the
following.
Sub-sections can be deduced from this.
7.8.1 Assembly of housing /
shaft spider
Push or press the shaft spider 338 into the
housing 100 together with the two anti-torsion
inserts 566/1.
Use a suitable plastic tube for pressing.
The pressing force must only be
applied over the sliding surface of
the shaft spider.
(risk of the silicon carbide breaking)
Insert shaft sleeve 523/1 into the shaft spider
338.
7.8.2 Assembly of slide-in unit
Press the inner magnet assembly 859 onto the
impeller 230. Pay attention to the correct
alignment of the driver cams.
Press the circlip 932/7 into the appropriate
groove on the impeller 230 with a suitable plastic
tube. Make sure that the click connection of the
circlip 932/7 audibly engages to perform its
function.
Press the bearing bush 545/1 into the impeller
230 together with the anti-torsion insert 566/2.
Make sure that the anti-torsion insert 566/2 is
approx. 2 mm shorter than the plain bearing.
Insert distance ring 504 and then the bearing
bush 545/2.
Z Z