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7 Servicing/Maintenance
49 of 68
Multitec A SX
7.4.4 Removing the shaft seal
7.4.4.1 Removing the mechanical seal
Removing the standard mechanical seal
Fig. 18:
Removing the mechanical seal
ü
The pump has been drained.
ü
The bearings have been removed.
1.
Remove O-ring 412.10.
2.
Dismantle any auxiliary piping (circulation, etc., depending on model).
3.
Loosen nut 920.3 on seal cover 471 until the spring of the mechanical seal is
relaxed.
4.
Undo nut 920.1 and remove bearing housing 350.1.
5.
Pull off spacer sleeve 525.1.
6.
Remove seal cover 471.1 with the mating ring and gasket 400.1.
7.
Remove primary ring (not in case of bellows-type seals).
8.
Remove key 940.2.
9.
Pull off shaft sleeve 523.1 with the rotating assembly of mechanical seal 433.1.
Two holes are provided in the shaft sleeve for engaging a puller.
10.
Take off seal housing 441.1.
11.
Remove O-ring 412.4.
7.4.4.2 Dismantling the gland packing
Fig. 19:
Dismantling the gland packing