DETROIT DIESEL 53
Clean and dry all of the parts thoroughly.
The finished inside face of each end plate must be
smooth and flat. Slight scoring may be cleaned up with
a fine grit emery cloth. If the surface is badly score J
replace the end plate.
Inspect the surfaces of the rotors and the blow r
housing. Remove burrs or scratches with an oil stone.
Examine the rotor shaft, gear or drive coupling for
burred or worn serrations.
Inspect the blower gears for excessive wear or damage.
Check the bearing and oil seal contact surfaces of the
rotor shafts and end plates for scoring, wear or nicks.
Fig. 7. - Installing Rear End Plate
If an oil seal sleeve is used on the rotor shaft, it can le
9. Remove the rotors from the blower housing.
replaced as follows:
10 Remove the rear end plate as in Step 9.
Place sleeve remover J 23679-2 over the
rot-). shaft and behind the oil seal sleeve.
11.Remove and discard the lip type oil seals from the
Back out the center screw of one gear
puller J 21672-7 and attach the puller to the
12 If required, disassemble the blower drive spring
sleeve remover with three 1/4 "-20 x 3 "
support by driving the cam from the support with a brass
bolts and flit washers.
drift, permitting the springs and spring seats to fall free.
Fig. 8. - Installing Blower Rotor Gears
Fig. 9. - Measuring Rotor Lobe to Housing Clearance
1972 General Motors Corp.
SEC. 3.4 Page 7