______________________________________________________________________________
DESMI Pumping Technology A/S
10
Tagholm 1
9400 Nørresundby – Denmark
Tel: +45 96 32 81 11 Fax: +45 98 17 54 99
E-mail:
5.3 DISMANTLING SEAT
Press out the seat from behind the shaft seal cover (the bearing housing in S32-25-110N and
S50-32-135N).
5.4 DISMANTLING BEARING
Before dismantling bearing remove ring lock (12). Then pull the shaft/coupling out from the
bearing cover and press the bearing out of the bearing cover.
5.5 INSPECTION
When the pump has been dismantled, check the following parts for wear and damage:
- Sealing ring/impeller
: Max. clearance 0.4-0.5 mm measured in radius.
(There is no sealing ring in S32-25-110N and S50-32-135N)
- Shaft seal/shaft seal cover
:
Check the seat for flatness and cracks.
Check the rubber parts for elasticity.
- Bearing
: Replace in case of wear and noise.
- Non-return flap
:
Check for cracks and hardness
5.6 DISMANTLING COUPLING
It is not necessary to remove the coupling from the pump shaft during normal maintenance.
Otherwise dismantle the coupling by removing the pointed screw and pulling off the coupling.
If the coupling is dismantled on the assembled pump, take care that the bearing is not
damaged by pulling too hard in the coupling. If the coupling is removed after dismantling the
pump, fix the shaft at the thread on the opposite shaft end while the coupling is pulled off.
6. ASSEMBLING
6.1 FITTING SEALING RING IN PUMP CASING
When fitted, the sealing ring is to bear against the shoulder of the pump casing.
6.2 FITTING BEARING
Place the support disc (14) in the bearing cover and press the bearing into place in the
bearing cover. Lead the shaft through the bearing cover, support disc and bearing, and press
the bearing into place up against the support disc. Fit ring lock (12). (Fit ring lock (30) and a
new oil seal ring (31) in S32-25-110N or S50-32-135N).
6.3 FITTING WATER DEFLECTOR
Tighten the bearing cover to the shaft seal cover. Lead the water deflector over the shaft until
it touches the shaft seal cover and then further 1-1.5 mm into the shaft seal cover (the bearing
housing in S32-25-110N or S50-32-135N).