30
4. Maintenance4.5 Primary seals removal and fitting
4.5.3 R90 Double flushed mechanical seal
Seal removal:
1. Turn off the flush and disconnect the flushing pipework.
2. Loosen screws (14) through the flushing connections.
3. Remove seal housing nuts and separate housing (13) from rotorcase.
4. Remove rotorcase.
5. Extract stationary seals (2) from rotorcase and rotary seal (3) from the shaft.
6. Remove seal housings complete with stationary seals.
Seal fitting:
Ensure seal orientation is correct.
1. Lightly lubricate O-rings.
2. Fit o-rings (1 and 12) to stationary seals (2 and 10), and fit to seal housings (13) and rotorcase.
3. Locate seal housings over shafts.
4. Wipe clean the sealing faces with solvent.
5. Fit O-rings (4 and 8) to rotary seals (3 and 9) and fit to shafts.
6. Fit new seal housing gasket (11).
7. Refit rotorcase.
8. Locate seal housing and tighten nuts.
9. Tighten screws (14) through the flushing connections.
Outboard
Inboard
Model S1, the outboard seal
fits over the inboard seal.
Models S2-6, the
inboard seal fits over the
outboard seal.
Inboard
Outboard
Item Description
1 Stationary seal ring O-ring
2 Stationary seal ring
3 Rotary seal ring
4 Rotary seal ring O-ring
5 Wave spring
6 Drive ring
7 Wave spring
8 Rotary seal ring O-ring
9 Rotary seal ring
10 Stationary seal ring
11 Gasket
12 Stationary seal ring O-ring
13 Seal housing
14 Grub screw
Rotorcase
side
Gearcase
side
14
