5 Maintenance
Read the instructions carefully. The items refer to the parts list and service kits section.
Lubricate the rubber seals before fitting them.
: Relates to the shaft seal.
Step 5
1. For the double mechanical shaft seal:
Fit drive ring (52) on stub shaft (7)
2. Fit back plate (25), washers (21) and nuts (20), then tighten
Step 6
1. Fit impeller (27) on stub shaft (7)
2. Ensure that the clearance between the impeller and the back
plate (25) is correct: 0.5 mm (0.02 inch)
3. Tighten screws (6) evenly until the stub shaft (7) cannot move
on the motor shaft
Step 7
1. Remove impeller (27), back plate (25) and drive ring (52).
2. Tighten screws (6) evenly to 15 Nm (11 lbf-ft).
3. Pump is assembled according to section 5.4 for single shaft
seal and section 5.5 for double mechanical seal.
Counter hold with a screwdriver
15Nm
(11
lbf-ft)
33