Table of Contents
Advertisement
7.7.5
7.7.6
7.7.7
7.7.8
7.7.9
7.7.10
42
Disassembly of the ball bearing
1 Remove both internal circlips (0300) from the bearing bracket.
2 Using a suitable bush which rests on the outer ring of the bearing, press the bearing
(0280) out of the bearing bracket.
Disassembling the mechanical seal MCHZS
1 Remove the seal cover (0040) from the pump shaft and remove the static ring from
the mechanical seal.
2 Slide the rotating ring for the mechanical seal (0230) off the pump shaft.
If the reason for disassembly was to replace the mechanical seal, the new mechanical
seal can now be fitted. See from paragraph 7.8.5 for this.
Disassembling the set of stage casings
1 Uncouple the balance pipe (0650) if fitted.
2 Only for MCHZS: Slacken the adjustment screw (0400) and remove the set ring
(0120).
3 Unscrew the nuts (0690) from the tie rods (0670 and 0680).
4 Remove the pump casing (0020) from the stage set. Using a suitable bush press or
tap the throttling bush (0100) from the pump casing.
5 Remove the external circlip (0130) and any throttling sleeve (0110) from the pump
shaft.
6 Remove the end cover (0060) and remove the air-wheel (0070). Remove the key
(0660) from the shaft and remove the gasket (0210).
7 Remove the pump cover (0050) and remove the external circlip (0130).
8 Remove all impellers (0520), stage casings (0510) and keys (0660).
9 Remove the suction cover (0500) from the pump casing (0020) on the suction side.
Disassembling the bearing housing on the suction side
1 Position the pump casing with the shaft horizontally.
2 Remove the rear bearing cover (0150).
3 Continue from step 5 of paragraph 7.7.4.
Disassembling the ball bearing on the suction side
See paragraph 7.7.5, with exception of step 1, whereby item no. (0280) now becomes:
item no. (0270).
Disassembling the mechanical seal on the MCHZS suction side
See paragraph 7.7.6, whereby item no. (0230) becomes item no. (0220).
Disassembly and assembly
MCHZ/EN (0912) 4.2
Advertisement
Table of Contents
