Anti-Friction Bearings; General; Tg Gs2-25, Tg Gs3-32 And Tg Gs6-40 Disassembly; Tg Gs2-25, Tg Gs3-32 And Tg Gs6-40 Assembly - Johnson Pump TG GS2-25 Instruction Manual

4.5

Anti-friction bearings

4.5.1

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 bearing bracket.
• 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 shrunk connection.
• Anti-friction bearings type 2RS of TG GS2-25,
TG GS3-32 and TG GS6-40 are sealed and
greased for life. Bearings of the other pump sizes
are to be greased at the cage.
Note! Add a correct grade and the appropriate type of grease. Do not overfill.
4.5.2

TG GS2-25, TG GS3-32 and TG GS6-40 disassembly

1. First disassemble the flexible coupling half using a coupling extractor.
2. Remove key (1570), set screws (1480) and tap bolts (1540).
3. Remove inner circlips (1500) and the support rings (1510).
4. The bearing housing (1430) can now been removed.
5. Detach bearing bracket (1400) by loosening
the screws (1410).
6. Remove outer circlips (1450) and the
support ring (1460) from the shaft.
7. Remove the ball bearing (1440)
from the shaft. Use an appropriate extractor.
4.5.3

TG GS2-25, TG GS3-32 and TG GS6-40 assembly

1. Assemble bearing bracket (1400) with the screws (1410).
2. Fit a new ball bearing (1440) in the bearing housing (1430) together with support rings (1510)
and inner circlips (1500).
3. Place one outer circlip (1450) and one support ring (1460) on the shaft.
4. Fit the assembled ball bearing together with the bearing housing on the shaft against the support
ring (1460). Push with an appropriate tool on the inner bearing ring. Fit the second support ring
(1460) and the second outer circlip (1450) on the shaft.
5. Fit set screws (1480) and tap bolts (1540).
6. Adjust axial clearance (see section 3.21.6).
7. Fit the key (1570) and the flexible coupling half.
50
Disassembly and assembly of
rolling bearing
TG GS2-25/3-32/6-40
1400
1480
1440
1510
1500
A.0500.501 – IM-TGGS/05.01 EN (03/2013)
1570
1430
1460
1450
1540