DETROIT DIESEL 53
3-53 ENGINE BLOWER
Wedge a clean cloth between the rotors to prevent their turning. Then remove the blower gear retaining bolts and
2. For identification, mark the R.H. helix gear. Then remove the gears with pullers J 5825-01 as follows:
With the pullers in place under the gears (Fig. 5), place a brass bar, approximately I " long and
5/8 " diameter, between the point of each puller bolt and blower rotor shaft.
If the brass bar is larger than 5/8" diameter, the serrations in the blower drive
gear may be damaged.
Alternately turn the bolt in each puller until the gears are off the shafts.
3. Remove the rotor shims and the gear spacers and place them with their respective gears to ensure correct re-
4. At the other end of the blower, remove the three thrust plate bolts, the thrust plate and three spacers from the front
end plate. Remove the bolts and thrust washers (refer to Fig. 7).
5. Remove the two screws that retain the end plate to the blower housing. Tap the end plate off of the dowel pins and
housing with a soft (plastic) hammer, being careful not to damage the mating surfaces of the end plate and the housing.
6. Remove the rotors from the blower housing.
7. Remove the retaining screws and remove the rear end plate as in Step 5.
8. Remove and discard the lip type oil seals from the end plates on current blowers. Remove the seal washer, "O" ring,
retainer and retainer spring from each rotor shaft on former blowers.
July, 1972 SEC 3.4 Page 3