TM 5-3810-300-24&P-3
BLOWER 3.4
Assemble Rotors and End Plates
(With Lip Type Oil Seals)
1. Install the blower front end plate, making sure the
mark TOP on the outer ribbed side is at the top of the
blower housing, identified by the flange which supports
the housing on the top edge of the cylinder block (Fig.
The front and rear end plates of the blower are inter
changeable.
One end plate should be assembled to the front end of
the blower housing first and the other plate should be
assembled to the rear of the blower housing after the
Fig. 19 - Installing Blower Rear End Plate (Lip Type Oil
rotors are in place. Attach an end plate to the front of the
Seals)
blower housing as follows:
mating surfaces must be flat and smooth.
a. Check the dowel pins. The dowel pins must
d. Insert the two fillister head screws through the
project .380" from the flat inner face, and .270" from the
end plate and thread them into the housing.
outer face of the front end plate to assure proper
Tighten the screws securely. Do not use lock
alignment of the end plate to the housing and the cover
washers on these screws.
to the end plate.
2.
Assemble the blower rotors in the blower housing
b. Place the blower housing on a bench with the
and front end plate as follows:
top of the housing up, and the front end of the housing
facing the outside of the bench.
The rotors must be assembled in the blower housing with
the omitted serrations in the rotor shafts aligned as
c. Position the end plate in front of the blower
shown in Fig. 28.
housing with the flat finished face of the end plate facing
NOTE: The housing used in E, T and P blower
the housing and the end marked TOP facing the flanged
assemblies are stamped for identification with
side of the housing. Then, start the dowel pins straight
the letters "E", "T" or "P" near the top of the
into the dowel pin holes in the housing. Push or tap the
housing. The "N" engines are also stamped
end plate against the housing.
"E".
Note that gaskets are not used between the end plates
a. Place an oil seal pilot J 6270-5 on the short
and the housing; therefore, the
(non-splined) end of each rotor shaft. Then,
place the rotors in mesh with the omitted
serrations in the shafts in alignment as shown
in Fig. 28.
NOTE: When oversize oil seals are used in
the blower end plate, use oil seal spacer
installers J 6270-28 for the oil seal pilots in
place of J 6270-5.
b. Insert the blower rotors with oil seal pilots
straight into the blower housing with the right-
Fig. 18 - Assembling Blower Rotors into Housing and
hand helix rotor at the top, flange, side of the
Front End Plate (Lip Type Oil Seals)
housing. Then, push the rotor shafts and oil
seal pilots on through the oil seal in the front
end plate as shown in Fig. 18.
PAGE 261
