Alfa Laval LKH - Assembly of pump;double mechanical shaft seal

5 Mainten ance
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
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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.
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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).
N
N
O
O
T
T
E
E
Ensure that both drive pins on the drive ring enter the notches in
rotating seal rings.
If change from single shaft seal to doub le 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
3000-0250
TD239-007_1
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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.
3000-0252
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4
4
1. Clean the sealing surfaces with contact cleaner.
2. Fit seal housing (40a) on the back plate (25) and tighten screws
(41).
3000-0236
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5
5
1. To enable fittin
g of back plate (25) with the shaft seal, remove
Connex pin (8) fr
om stub shaft (7) (if fitted).
2. Carefully guid
e the back plate onto a daptor (16).
3. Fit washers (21
) and nuts (20).
3000-0243
38
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