____________________________________________________________________________________
DESMI Pumping Technology A/S
7
Tagholm 1
9400 Nørresundby
–
Denmark
Tel: +45 96 32 81 11 Fax: +45 98 17 54 99
E-mail:
5.2 DISMANTLING SHAFT SEAL
ø215/265
Remove nut (6). Pull off the impeller, and remove sunk key (9). Remove Allen screws (19), which hold the
bearing housing to the shaft seal cover, pull shaft seal cover and bearing housing apart, by which the shaft
seal (10) and water deflector (11) are pulled off the shaft.
ø330/415/465/525
Remove set screw (6). Pull off the impeller, and remove sunk key (9). Remove set screws (19), which hold
the bearing housing to the shaft seal cover, pull shaft seal cover and bearing housing apart, by which the
shaft seal (10) is pulled off the shaft.
5.3 DISMANTLING SEAT
Press out the seat from behind the shaft seal cover.
5.4 DISMANTLING SHAFT WITH BEARINGS
Before dismantling the shaft with bearings, remove the sunk key (16). The shaft can now be pulled out of
the bearing housing allowing inspection of the bearings.
5.5 INSPECTION
When the pump has been dismantled, check the following parts for wear and damage:
- Sealing rings/impeller:
Max. clearance 0.4-0.5 mm measured in radius.
- Shaft seal/shaft seal cover: Check the seat for flatness and cracks.
Check the rubber parts for elasticity.
- Bearings:
Replace in case of wear and noise.
6. ASSEMBLING
6.1 FITTING SEALING RINGS
When fitted, the sealing ring (4) in the pump casing (1) is to bear against the shoulder of the pump casing.
ø330/415/465/525
When fitted, the sealing ring (27) in the shaft seal cover (20) is to bear against the shoulder of the shaft
seal cover.
6.2 FITTING SHAFT WITH BEARINGS
Lead shaft with bearings into the bearing housing. Fit sunk key (16).
ø330/415/465/525
Fit cover under bearing (26). For pumps with Lip seal in cover under bearing please read appendix A.
