5 Maintenance
Study the instructions carefully. The items refer to the parts list and service kits section.
Handle scrap correctly.
: Relates to the shaft seal.
Step 7
1. Fit impeller (39) or (40) on stub shaft (9) by rotating clockwise.
2. Ensure that the clearance between the impeller and back plate
(30) is 1.0 mm (0.04”).
1.0 mm (0.039”)
TD 252-037
Step 8
1.
Remove impeller (39) and back plate (30).
2. Tighten screws (13) evenly to 15 Nm (11.06 lbf-ft).
Counterhold with a screwdriver
TD 252-038
15Nm
(11.06
lbf-ft)
Step 9
1. Slide O-ring (31) onto stationary seal ring (32).
2. Press the stationary seal ring into back plate (30).
TD 252-039
Step 10
Flushed shaft seal:
1. Fit lip seal (24) and O-ring (26) in seal housing (21).
2. Fit the housing on back plate (30) and tighten the screws (22).
3. Slide sleeve (27) with O-ring (25) onto stub shaft (9).
TD 252-040
Step 11
1. Fit back plate (30), washers (20) and nuts (19) and tighten.
Tightening torques: See 6 Technical data
2. Fit O-ring (43) on the back plate.
TD 252-041
Step 12
1. Lubricate impeller hub (39) with silicone grease or oil.
2. Screw the impeller onto stub shaft (9).
3. If used, fit O-ring (42) and impeller screw (41).
Tightening torque for impeller screw: 20 Nm (7.4 lbf-ft)
TD 252-042
Step 13
Flushed shaft seal
1. Screw fittings (23) into seal housing (21).
2. Tighten with a spanner.
TD 252-023
21
