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Double Lip Seal - General
Note: Before use, chemical compatibility must be
verified for the following compounds present or
recommended.
A. 'O'rings - Viton
B. 'O'ring lubricant: Dow Silicon III.
C. Lip seal lubricant: Molykote FS-3451 (Dow Corning)
• Careful attention to the following will prevent seal
leakage:
• Take care with lip seal surfaces when removing or
refitting the seal.
• 'O'rings and Lip seals should be protected from shaft
splines when assembling and disassembling the pump.
• The seal consists of a rotary seal sleeve (6), which is
retained on the shaft by means of a pin locating in a slot on
the shaft. An 'O' ring (9) seals the rotary sleeve to the
shaft.
• Housing plate (5), and 'O'ring (8) mounts to the pump
rotor case and houses the lip seal elements (2), 'O'ring (3)
and spacer (4) .
• Retaining ring (1) and a snap ring (7) hold the lip seal
into position.
Double Lip Seal - Assembly
1. Make sure the shaft and pump body bores in the seal
area are thoroughly cleaned.
2. Coat the 'O'ring (9) in the underside of the shaft sleeve (6) with a thin layer of lubricant (supplied).
3. Gently slide the shaft sleeve (6) over the pump shaft and engage the pin from the sleeve into the
slot on the shaft.
4. Place 'O'ring (8) into pump body bore and coat it with a thin layer of lubricant.
5. Fit the housing plate assembly (5) into the pump body and on top of the 'O'ring (8). The flat side of
the housing plate should face towards the center of the pump.
6. Fill cavity between the two lips with a chemical resistant grease, Molykote FS-3451 or similar.
7. Tighten the capscrews to retain the housing plate (5) to the pump body.
8. When fitting pump body onto gear housing be very careful not to damage the lip seals with shaft
splines. A shaft protector (p/n 530041201) should be used to prevent spline damage to the seals.
6
54 32 1
98 7
Item Description
1 Retaining Ring
2 Lip Seal Element
3 'O' ring
4 Spacer
5 Housing Plate
6 Shaft Sleeve
7 Snap Ring
8 'O' ring
9 'O' ring
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