47
Pump
shaft
Coupling
bush
Great
washer
Nut
Stud
A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)
47
4.5 Couplling bush
4.5.1 General
The coupling bush has a slide fitting on the pump shaft, Hammering or hard pushing can damage the
ball bearing and disturb the axial clearance setting.
4.5.2 TG BLOC15-50 to TG BLOC86-100 coupling bush assembly
1. Screw a stud (or some other special tool) in the tapped hole of the pump shaft.
2. Place the coupling bush on the shaft end with the aid of a nut and a great washer, you can also
heat up the coupling bush (+/- 80°C with water or oil) for easy fitment.
4.6 Anti-friction bearings
4.6.1 General
• Never re-use a disassembled bearing or a disassembled lock plate!
• For disassembly and assembly of the bearing (and coupling), use
correct tools in order to inspect the pump without any shock loads.
Shocks can damage the crisp material of bush bearings and
mechanical seal.
• The anti-friction bearing has an interference fit on the pump shaft
and a clearance fit in the lantern piece.
• The anti-friction bearing can easily be mounted when heated
to 80°C so that it slides on the pump shaft.
• Always push on the inner ring of the bearing. Pushing on the
outer ring may damage the rolling parts between rotor and shaft.
• Support pump shaft at rotor side, not the rotor! Axial force on
rotor - pump shaft may damage the shrink connection.
• Anti-friction bearings type 2RS are sealed and greased for life.
4.6.2 TG BLOC15-50 to TG BLOC86-100 disassembly
1. Remove hex nuts (6040) and bolts (6030) and disassemble the flanged motor.
2. Remove tap bolts (1610) from lantern piece (1400) and remove the protection plates (1600).
3. Release set screw (6020) on the coupling bush (6010) and pull off the coupling bush (6010)
from the shaft (0702) by use of appropriate extractor.
4. Remove the shaft key (1570).
5. Loosen the tab bolts (2290) and remove the bearing cover (1430).
6. Loosen the tap bolt (1410) and disassemble the lantern piece (1400).
7. Remove outer circlip (1450) and support ring (1460).
8. Push the second bearing cover (1430) towards the pump and disassemble the bearing (1440)
with the use of approprite extractor.
9. Remove the second support ring (1460) and inner circlip (1450 - in case of TG BLOC
58-80/86-100) if necessary.
(Mount the coupling bush against the edge of the
shaft collar.)