Product Manual A

Maintenance
31609 A MTP4000-6000DZV/DZD Operating Manual 55
6. The suction wear ring can be removed by drilling the ring longitudinally in three places to relieve compres-
sion and collapsing the three sections together. Use care not to drill into the volute casting. Better control is
obtained if small pilot holes are first drilled and then enlarged to “cut” the ring. This same technique can be
used to remove the hub wear ring.
Figure 22 - 6 Inch Pump Cross-Section
Pump Reassembly
1. Each mechanical seal has its own particular assembly procedures. Refer to “Mechanical Seal” on page 58.
2. Replace the backplate.
1. Shaft key 12. Priming chamber
2. Lip seals (3) 13. Wear ring
3. Shims 14. Impeller lockscrew
4. Frame 15. Impeller washer
5. Breather 16. Impeller shims
6. O-ring (sleeve) 17. Mechanical seal
7. Mechanical seal oil reservoir 18. Shaft sleeve
8. Backplate 19. Pump end bearing
9. Volute gasket 20. Shaft
10. Impeller key 21. Drive end bearing
11. Impeller 22. Engine bracket
1
2
3
4
5
6
7
89
10
13
14
15
16
17
18
2
1920
21
22
12
11
01284