KRAL C Series - Page 35

12 Servicing
12.4 Replacing the mechanical seal (inner bearing)
13
14
312
A
E
21
13
14
3
Mechanical seal with throttle ring
Size15–660, 880:
Use the mounting arbour radial shaft seal ringE to press the throttle ring14 into the seal hous-
ing3 and insert the circlip13.
Use the mounting arbour stationary seal ringA to press the stationary seal ring12 with mounted
O-ring into the seal housing.
-or-
13
15
312
A
E
21
3 1315
Mechanical seal with quench
Size15–660, 880:
Use the mounting arbour radial shaft seal ringE to press the radial shaft seal ring15 into the seal
housing3 and insert the circlip13.
Use the mounting arbour stationary seal ringA to press the stationary seal ring12 with mounted
O-ring into the seal housing.
5. Clean the sliding surfaces of the mechanical seal carefully and grease with silicone grease.
3 541
7
5
11
3
7
4
10
8
2
B
1
B
9
6 6
6. Position the flat gasket7 at the seal housing.
7. Attention: Ensure that the spring ring2/straight pin8 is not damaged during the mounting of the
seal housing. Take the holes in the pump flange into account.
Carefully slide the seal housing with flat gasket until the pump flange stops at the main screw.
8. Size15–660, 880: Tighten the socket screws4 between the seal housing and the pump with
torque.
-or-
Size851, 951–3550: Tighten the socket screws11 between the seal housing and pump with
torque.
9. Remove the mounting sleeve main screwB.
3
4
10
9
10. Size851, 951– 3550: Slide the O-ring9 onto the seal flange10 and tighten the socket screws4
between the seal flange and seal housing3 with torque.
11. Mount the feather key5.
Operating instructions
OIC 18en-GB Edition 2020-01
35