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.
5.6
Assembly of pump/double mechanical shaft seal
Step
Step
Step 1
1
1
1. Fit O-rings (15) in rotating seal rings (14).
2. LKH-70 to -90: Fit cups (54) on rotating seal rings (14).
3. Fit spring (13) on one of the rotating seal rings (14) and place the drive ring (52) in between.
Step
Step
Step 2
2
2
1. LKH-70 to -90: Turn the drive ring (52) in order to place it
correctly on the pump shaft (7).
2. Fit the second rotating ring (14) on the other end of the spring.
3. Place the parts on the stationary seal ring fitted in back plate
(25).
NOTE
NOTE
NOTE
Ensure that both drive pins on the drive ring enter the notches
in rotating seal rings.
If change from single shaft seal to double mechanical shaft seal
the shaft needs to be adjusted. see Section 5.7 Adjustment of
shaft (LKH-5) and Section 5.8 Adjustment of shaft (LKH-10 to
-90).
Only LKH-70-90
Step
Step
Step 3
3
3
1. Lubricate O-ring (44) and slide onto seal housing (40a).
2. Lubricate O-ring (50) and fit on stationary seal ring (51) and
fit this in the seal housing.
Step
Step
Step 4
4
4
1. Clean the sealing surfaces with contact cleaner.
2. Fit seal housing (40a) on the back plate (25) and tighten
screws (41).
Step
Step
Step 5
5
5
1. To enable fitting of back plate (25) with the shaft seal, remove
Connex pin (8) from stub shaft (7) (if fitted).
2. Carefully guide the back plate onto adaptor (16).
3. Fit washers (21) and nuts (20).
38
