LEYBOLD TRIVAC B SERIES User Manual

Maintenance
3.6 Replacing the Shaft Seal
Required tools:
Allen keys size 3, 5 and 8, flat-nose pliers, plastic
hammer, shaft seal driver, possibly a puller for the
coupling.
Required spare parts:
Shaft seal . . . . . . . . . . . . . . . . . . . . . . . . . 239 53 007
Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . 231 92 034
Oil marks under the coupling housing are signs of a
damaged shaft seal.
The shaft seal can be replaced without removing or
disassembling the pump module.
Shutdown the pump.
Drain the oil (see Section 3.2).
Support the motor.
Unscrew the four non-recessed hex. socket screws
(11/5) and remove the motor (11/6).
Remove gasket (11/1).
Remove coupling element (12/1).
Unscrew screw (12/2) and pull off the spring washer
(12/3).
Pull off the coupling half (12/4).
Remove key (12/5).
Pull off the compression ring (12/6) and O-ring (12/7).
Unscrew the hex. socket screws (12/9) and pull out the
centering disc (12/10).
If the centering disc does not come loose, use the forcing
thread into which screws (12/9) can be screwed in.
Remove the O-ring (12/11).
Force the shaft seal (12/8) out of the centering disk.
Pull off the bushing (12/12) from the shaft.
We recommend the use of a new shaft seal and bushing
for reassembly.
Before fitting the new shaft seal, moisten it slightly with a
little vacuum pump oil.
Using a suitable plastic or aluminium cylinder (shaft seal
driver) and a plastic hammer, force the shaft seal (12/8)
carefully and without bending it into the centering disk
(for position of shaft seal, see Fig. 12).
19
Fig. 12 Exchanging the shaft seal
Key to Fig. 12
1 Coupling element
2 Cylinder head screw
3 Spring washer
4 Coupling (one half)
5Key
6 Compression ring
7 O-ring
8 Shaft seal
9 Screws
10 Centering disk
11 O-ring
12 Bushing
1
2
3
4
5
6
7
8
9
10
11
12

LEYBOLD TRIVAC B SERIES Specifications

General

Brand	LEYBOLD
Model	TRIVAC B SERIES
Category	Water Pump
Language	English