KRAL C Series - Page 33

12 Servicing
12.4 Replacing the mechanical seal (inner bearing)
3 541
7
5
11
3
7
4
10
8
2
B
1
B
9
6 6
1. Remove the feather key5 of the main screw1.
2. Size15–660, 880 (figure left):
Remove the socket screws4 of the seal housing3 and take off the seal housing.
-or-
Size851, 951–3550 (figure right):
Remove the socket screws4 of the seal flange10 and take off the seal flange. Pull the O-ring9
off the seal flange10. Remove the socket screws11 of the seal housing3 and take off the seal
housing.
3. Size15–660, 880: Remove the flat gasket7 and carefully clean the fitting surface of the seal
housing.
-or-
Size851, 951–3550: Remove the flat gaskets7 (2x) and carefully clean the fitting surface of the
seal housing
4. Attention: Ensure that the adapter sleeve/threaded pin is not damaged.
1212 1032
Mechanical seal standard/hard material:
Size15–660, 880 (figure left)/Size851, 951–3550 (figure right):
Press the stationary seal ring12 out of the seal housing/seal flange.
-or-
13
14
312 2
Mechanical seal with throttle ring:
Size15–660, 880:
Remove the circlip13 and throttle ring14 from the seal housing and press the stationary seal
ring12 out of the seal housing.
-or-
13
15
312 2
Mechanical seal with quench:
Size15–660, 880:
Remove the circlip13 and radial shaft seal ring15 from the seal housing and press the stationary
seal ring12 out of the seal housing.
Operating instructions
OIC 18en-GB Edition 2020-01
33