KRAL C Series - Installing the Screw Set

12 Servicing
12.8 Replacing the screw set (outer bearing)
2. Size32–42,55–660, 880 (figure left): Remove the socket screws6 at the flange cover5.
Size 2250–3550 (figure right): Remove the socket screws7 at the flange cover5.
3. Lift the cartridge housing1 of the flange cover. Hold the idle screws3 in the process.
4. Remove the idle screws.
2
3
9
8
2
5
10
11
14
13
15
2
5. Take the bearing bush set9, consisting of the bearing bush and segment washer (segment
washer only at Size 32–42,55–660,880), off the idle screws and keep it for mounting.
6. Size32–42,55–660,880,2250–3550: Remove the edge sealing rings8 from the flange
cover.
7. Remove the flat gasket11 at the flange cover.
8. Remove the O-ring10 from the flange cover and lift the flange cover from the main screw.
9. Unclamp the main screw2, rotate it by 180° and clamp again.
10. Size32–42,55–118,160–660,880:
Remove the supporting ring14 and circlip 15 from the main screw. Pull the balancing cylinder12
from the main screw.
12.8.2 Installing the screw set
Personnel qualification: o Fitter
Personal protective equipment: o Work clothing
o Protective gloves
o Safety boots
Aids: o Mounting sleeve ball bearing
Requirement:
ü Cartridge pump removed
ü Ball bearing removed
ü Shaft seal removed
2
5
10
11
12
14
15
2
12
2
1. Size32–42,55–118,160–660,880:
Press the balancing cylinder12 onto the shaft of the main screw2. Slide the circlip ring15 and
supporting ring14 onto the main screw.
2. Unclamp the main screw, rotate it by 180° and clamp again.
3. Mount the flange cover5 onto the main screw.
Operating instructions
OIC 18en-GB Edition 2020-01
45