(5) Also, examine surfaces which the thrust
d. Cleaning, Inspection and Repair.
washers contact; if these surfaces are scratched but
(1) Clean all parts. Be sure the oil holes in the
not severely scored, they may be smoothed down
with an oil stone. However, if score marks are too
which might restrict the oil flow, must be removed.
deep to be removed, or if parts are badly worn, new
(2) Inspect the cams and journals, and, if they
parts must be used.
are badly scored or worn, replace the camshaft.
(6) The clearance between new shafts and new
( 3 ) If cams are scored, the cam followers
b e a r i n g s is from 0 . 0 0 4 5 t o 0 . 0 0 6 i n c h o r a
should also be inspected (para 3-14).
maximum of 0.008 inch with worn parts. Excessive
(4) Examine both faces of the thrust washers.
clearance between the shafts and the bearings will
If either face is scored or if the thrust washers are
c a u s e low oil pressure and excessive backlash
worn excessively, replace the washers. New thrust
between the gears.
washers are 0.208 to 0.210 inch thick.
Figure 3-78. Camshaft, disassembly and reassembly.
(1) Remove all accessories and assemblies with
e. Remove Bearings.
their attaching parts as is necessary.
(2) Press the end bearing out of the cylinder
End bearings must be removed prior to removing the
block. The nearest intermediate bearings can now
be removed in the same manner.
(3) To facilitate assembly, the camshaft and
W h e n r e m o v i n g b e a r i n g s be sure to
balance shaft bearings are color coded as follows:
note the position of the bearings in the
b o r e with respect to the notch in the
b e a r i n g s . Replacement bearings must
End. . . . . . . . . . . . Black . . . . . . Standard . . . . . . Standard
b e installed in same position.
Intermediate . . . . . . . .Red . . . . . . . . Standard..................... Standard