1.7.2 Camshaft and Bearings
DETROIT DIESEL 53
Fig. 5. - Camshaft Bearing
Identification
Remove Bearings
The end bearings must be removed prior to removing
the intermediate bearings.
CAUTION:
When
removing
the
bearings be sure to note the position
of the bearings in the bore with respect
to the notch in the bearings.
Replacement
bearings
must
be
installed in the same position.
1. Remove all accessories and assemblies with their
attaching parts as is necessary so that tool set J 759302
may be used as shown in Fig. 3 and in A of Fig. 7.
Tool set J 7593-03, designed for use with standard size
bearings, may be used to remove and install .010"
undersize and .020" undersize bearings by reducing the
pilot diameter of the pilot J 7593-2, installer J 7593-3,
remover J 7593-5, installer J 7593-6, and installer J
7593-15. The pilot diameter of these tools should be
reduced by .020". This reduction in tool diameter does
not materially effect usage on standard size bearings. If
the tools are used frequently, However, it may be
advisable to purchase additional standard pieces.
Reduced diameter tools have not been released.
2. Insert the small diameter end of the pilot J 7593-2
into the end bearing.
3. Then. with the unthreaded end of the shaft J 7593-1
started through the pilot, push the shaft through the
block bore until the end of the shaft snaps into the
remover J 7593-5.
Fig. 6. - Location of Notch in Relation to Shaft Bore
4. Now drive the end bearing out of the cylinder block.
Centerline
The nearest intermediate bearings can be removed now
in the same manner.
The large diameter end of pilot J 7593-2 will fit into the
camshaft bore and is used when removing the other end
bearing and any remaining bearings.
1972 General Motors Corp.
Page 4
