Fig. 12 - Installing Blower Rear End Plate (Lip Type
Oil Seals) using Tool J 6270-5.
c. Check the dowel pins. The dowel pins must
project .380" from the flat inner face, and .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.
d. Place the rear end plate in position in front of
the oil seal pilots with the flat finished face of
the end plate facing the blower housing and the
mark TOP on the end plate at the top flange
side of the housing.
e. Place the rear end plate over the oil seal pilots
Fig. 13 - Installing Roller Bearing on Rotor Shaft
(Fig. 12) and start the dowel pins straight into
and in Front End Plate using Tool J 6270-4.
the dowel pin holes in the housing. Push or tap
the end plate against the housing.
b. Place installer J 6270-4 on top of the bearing
f. Insert the two fillister head screws through the
and tap the bearing on the shaft and into the
end plate and thread them into the housing.
Tighten the screws to 5-10 lb-ft (7-14 Nm)
c. Install the second roller bearing on the
torque. Do not use lock washers on these
remaining rotor shaft in the same manner.
d. Place the bearing retainers on top of the
g. Remove the oil seal pilots from the rotor shafts.
bearings and the end plate; then, install the
retainer bolts and lock washers. Tighten the
Install Blower Rotor Shaft Bearings and Gears
bolts to 7-9 lb-ft (9-12 Nm) torque.
1. With the blower housing, rotors and end plates still
2. Start the end of the water pump drive coupling
supported in a vertical position on the two wood blocks,
straight into the left-hand helix rotor shaft. Then, place
install the roller bearings on the rotor shafts and in the
a clean folded cloth between the blower rotors to
front end plate as follows:
prevent them from turning. Install the drive coupling
retaining bolt and draw the coupling and slinger tight
a. Lubricate one of the roller bearings with engine
against the end of the shaft, then tighten the bolt to 18
Start the bearing, numbered end up,
straight on one of the rotor shafts.