4-9.6 Rotorseal. (Figure 4-28). Replacement kits are available to allow the rebuilding of dual passage rotorseals. These
instructions should be followed carefully to assure a properly repaired rotorseal. The rotorseal should be removed from
its mounting and repairs should only be made in clean, dust free surroundings.
4-9.6.1 Disassembly
a.
Remove the four socket head screws and lock washers (22) and (23) from rear housing (1). Hold flange end of
rotorseal in up position and tap to separate housings. When internal parts do not fall free from rear housing (1),
the aid of a wire hook may be required to remove same.
b.
Where inspection indicates shaft (3) or bearings (18) are in poor condition, either or both must be replaced. If
these two parts require disassembly, remove shaft snap ring (19) and press shaft out through bearings. Remove
bearings from front housing (2) only if they require replacement.
4-9.6.2 Cleaning and Inspection.
a.
Clean and inspect all parts removed and disassemble. Any commercial cleaning solvent is suitable for this
purpose.
b.
Inspect and check ball bearings. They should be free of rust and contamination, revolve smoothly without
binding, and show no signs of excessive play or wear.
NOTE
Do not remove grease from grease packed bearings.
c.
Inspect lapped sealing end of shaft. This surface must be free of scoring and excessive wear.
d.
If shaft (3) or bearing (18) require replacement, disassemble as instructed above.
4-9.6.3 Assembly
a.
Assemble springs (12), (13) and (14), spring retainer rings (15), (16) and (17), "O" rings (9), (10) and (11) and
carbon rings (6), (7) and (8). ("O" rings should firmly seat on chamfered surfaces of carbon seals.)
b.
Spacer ring (20) should be re-oiled by submerging in warm engine oil (S.A.E. #10 or #20) for 15 or 20 minutes
before assembly.
c.
Press bearing (18) with spacer ring (20) into front housing (2) as shown. Enter bearings evenly into housing to
prevent binding.
d.
Press shaft through bearings until inner race of front bearing is against shaft shoulder. Inner race of rear bearing
must be "backed up" during this operation to keep outer races in place in front housing. Assemble shaft snap
ring (19).
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