Press the bearings (2, 3, 4, 5, and 6, fig. 31)
a.
102.
Camshaft, Bearings, Tappets, and
into the engine block.
Tappet Guides, Cleaning, Inspection, and Repair
Note. Before pressing the bearings
Cleaning. Clean all parts with an approved
a.
in the engine block made certain that
cleaning solvent and dry thoroughly.
the oil passages are in correct
Inspection and Repair.
b.
alinement, and press bushings
(1)
Measure the diameter of the tappets
carefully to prevent damage.
with a pair of outside micrometers.
Press the tappet guides (8) in the engine
b.
The proper diameter should be 0.6082
block.
to 0.6087 inch. If the tappet is worn
less than 0.6072 in., replace the
Place the tappets (7) in their guides.
c.
tappet.
Secure the tappets in a raised position and
d.
(2)
Inspect the tappet for scoring or
carefully install the camshaft (fig. 31).
damage to the contact surface.
Refer to figure 26 and install the camshaft
e.
Replace a badly pitted or scored
thrust plate.
tappet.
Install the oil pump assembly (par. 95).
f.
(3)
Measure the camshaft journals with
Install the cylinder head and valves (par.
g.
an outside micrometer. The proper
diameter for the camshaft journal is
2.2475 to 2.2480 inches.
If any
Install the tachometer drive (TM 53820205-
k.
journal is worn less than 2.2465 in.,
20/2).
replace the camshaft.
Install the timing gears and end plate (par.
i.
(4)
Inspect the gear on the camshaft for
worn, broken, or chipped teeth.
Install the tappet covers and oil cooler (TM
j.
Replace the camshaft if the gear is
5-820-205-20/2).
damaged.
103. Camshaft, Bearings, Tappets, and Tappet
Guides Installation
Section XVIII. FLYWHEEL AND HOUSING
Note. Do not remove the ring gear
104. General
from the flywheel unless it is to be
The flywheel is machined and balanced so that
replaced with a new gear.
the face and the counterbore will run true with its axis.
The flywheel housing houses the flywheel and provides
Use a punch or chisel and hammer between
e.
the engine rear mounting points and the mounting points
any two teeth on the ring gear until the gear has
for the engine starter. The starter engages the ring
expanded enough to slip off the flywheel.
gear, which is mounted on the flywheel.
106. Flywheel and Housing Cleaning, Inspection,
105. Flywheel and Housing Removal
and Repair
Remove the clutch assembly (par. 37).
a.
Cleaning. Clean all parts with an approved
a.
cleaning solvent and dry thoroughly.
Remove the engine rear panel (TM 5-3820-
b.
205-20/2).
b.
Inspection and Repair.
With a suitable lifting device raise and block
c.
(1)
Inspect the flywheel housing and
the engine.
engine block mating surface for.
nicks and burrs that would prevent a
Refer to figure 32 and remove the flywheel
d.
flush fit. Remove these with a file or
and housing from the engine.
handstone.
AGO 3456A
66
