Bauer Magnum SM 540 Operating Manual page 24

Before assembling hub and impeller
1) Measure the distance „A" from plain on insert part nr 343 0202 to the plain of gear housing
2) Measure the thickness of the hub flange on the inner part of the flange
„X" minus „Y" = distance „C"
3) Measure the distance „B" – Measure between gear housing to the plain for hub:
For measuring this distance, it is necessary to install the hub on the gearshaft without key and
fasten the nut on the shaft with torque 250 Nm. Afterwards dismount the hub.
4) Calculation for needed shims :
Distance „A" plus distance „B" minus distance „C" shall have a value of 45 +- 0,5 mm.
When a higher value as 45 mm+-0,5 mm exists it is necessary to put shims on the hub, to get
exactly this value. This measurement is absolutely necessary to have the correct load tension
on the mechanical seal.
5) Put the calculated number of shims on the hub
20
X
Y
Operating manual for BAUER gear pump
distance „C"