TM 5-3810-300-24&P-3
3.4 BLOWER
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. 19) and start the dowel pins straight into
the dowel pin holes in the housing. Push or tap
the end plate against the housing.
f.
Insert the two fillister head screws through the
end plate and thread them into the housing.
Tighten the screws securely. Do not use lock
washers on these screws.
g. Remove the oil seal pilots from the rotor shafts.
Assemble Rotors and End Plates
With Ring Type Oil Seals)
Install the blower rotors in the blower rear end plate as
outlined below:
The front and rear blower end plates are inter
changeable. Note that gaskets are not used between
the end plates and the housing; therefore, mating
surfaces must be flat and smooth.
Fig. 20 - Installing Blower Rotor in Rear End Plate (Ring
Type Oil Seals)
a. Check the dowel pins. The dowel pins must
project .380" from the flat inner face, and .270"
c.
Remove the oil seal pilots from the rotor shafts.
from the outer face of the rear end plate to
assure proper alignment of the end plate to the
3.
Attach the blower rear end plate to the blower
housing and the cover to the end plate.
housing as follows:
a. Reverse the blower housing on the bench (rear
b. Support the rear end plate on two wood blocks,
end of housing facing the outside of the bench).
approximately 4" high, with the inner face of the
end plate facing up and the TOP end of the end
b. Place an oil seal pilot J 6270-5 on the serrated
plate facing to the right (Fig. 20).
end of each rotor shaft.
c. Lubricate the oil seal ring in the carrier on the
NOTE: When oversize oil seals are used
rear (splined) end of the right-hand helix rotor
in the blower end plate, use oil seal spacer
shaft with engine oil.
installers J 6270-28 for the oil seal pilots in
place of J 6270-5.
d. Hold the right-hand rotor in a vertical position,
rear (splined) end down, and position the seal
c.
Check the dowel pins. The dowel pins must
ring in the carrier so the ring protrudes from its
project .380" from the flat inner face, and .270"
groove the same amount on each side.
from the outer face of the rear end plate to
assure proper alignment of the end plate to the
e. With the omitted serration in the spline, of the
housing and the cover to the end plate.
shaft facing toward the top of the end plate, start
the splined end of the rotor shaft straight into the
right-hand shaft opening in the end plate as
shown in Fig. 20.
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