1. Apply a rubber base sealant between
the entire joint face of both ends of
blower housing to end plates interfaces,
especially around the bolt holes and dow-
els.
NOTE
Be sure no sealant protrudes into
the blower housing. Also the seal-
a n t must n o t p r e v e n t t h e e n d
plates
from
laying
against
the
housing.
2. Install the blower rotors in the blower
rear end plate as outlined below:
NOTE
The front and rear blower end
plates are interchangeable.
A. Check the dowel pins.
The dowel
pins must project 0.380" from the flat
inner face, and 0.270" from the outer
face of the rear end plate to assure
proper alignment of the end plate to
the housing and the cover to the end
plate.
F i g u r e 11D-14. I n s t a l l i n g O i l S e a l
Ring Carrier on Blower Rotor
Support the rear end plate on two
B.
wood blocks, approximately 4" high,
G. Place the oil seal ring collar installer
with the inner face of the end plate
J 6270-4 on top of the seal ring collar
facing up and the TOP end of the end
and under the ram of the press in the
right
(see
plate
facing to
the
same
manner
as
shown
in
Then
Figure 11D-13 on page 11D-9.
press the collar into the end plate un-
Lubricate the oil seal ring in the car-
C.
the s h o u l d e r o n t h e i n s t a l l e r
til
rier on the rear (splined) end of the
c o n t a c t s the end plate.
right hand helix rotor shaft with en-
gine oil.
NOTE
Hold the right hand helix rotor in a
D.
A step under the shoulder of the
vertical position (gear end up) and
installer will position the collar ap-
position the seal ring in the carrier so
proximately 0.005" below the fin-
the ring protrudes from its groove
ished face of the end plate. This
the same amount on each side and the
is within the 0.002" to 0.008" spec-
gap is facing away from the service-
ified.
man.
E. With omitted serration in the splines
H. Install the remaining oil seal ring col-
of the shaft facing toward the top
lar in the end plates in the same man-
side of the end plate, start the end of
ner.
the rotor shaft into the right hand
shaft opening in the end plate so that
the gap portion of the seal ring is
A s s e m b l e Rotors and End Plates
into
started
t h e r i n g c o l l a r (see
Figure 11D-15 on page 11D-11). Con-
Note that no gaskets are used between
tinue to lower the rotor and very
the end plates and the housing. T h e r -
fore, the mating surfaces must be per-
fectly flat and smooth.
