4-41. BLOWER REPAIR (Cont)
Top of front end pIate is identified
by three bolt holes and one oil
hole. Bottom of end plate has
three bolt holes and three oil
holes. Dowel pins extend from
both sides of front end plate.
The horizontal oil passage in top
of front end plate intersecting the
vertical oil passages is plugged.
Do not install this end plate on
rear of blower housing.
Mating surfaces between blower
end plates and blower housing
must be flat and smooth. No
gasket is used.
Apply light coating of Form-A-Gasket
sealant to mating surfaces of end
plate and blower housing. Sealant
must not protrude into housing.
Position front end plate (23) on two
wood blocks, finished side up. Install
blower housing (29), with match
marks alined, on two dowel pins (39).
Right hand helix rotor is marked
GEAR END on one end. Gear end
of left hand rotor has serrated shaft.
Place rotors (6 and 7) in mesh with
missing teeth in rotor shafts in
position and facing to left as viewed
from gear end.
For replacement lip-type oil seal set
only, install two oversized oil seal
pilots over underrated end of each
shaft of rotors (6 and 7).
Insert rotors (6 and 7) straight into housing (29) and through bores of front blower end plate
(25). If installed, remove oversized oil seal pilots.
For replacement lip-type seal set only, install two oversized oil seal pilots over serrated end
of each shaft of rotors (6 and 7).