TM 5-3810-289-34
holes to smallest permissible oversize with ST-406 drill
ream fixture as described in (Step 7).
(6) If necessary to correct for housing face
runout after the bore has been alined, remove housing
and recheck mating surfaces. Then reinstall, realign and
insert dowels.
Caution: Be sure all housing capscrews are
tight.
(7) To use ST-406.
(a)
Attach plate to crankshaft flange,
locating tapered plug in former dowel holes.
(b) Remove tapered plug, substitute drill
and ream bushings.
(c) Drill new dowel holes. Make sure all
metal shavings are removed from dowel holes. Ream
holes for oversize dowels.
Figure 3-167. Camshaft counterbore gasket installation.
Caution: If dowel holes are not pilot-reamed or
new dowels installed straight, housing will shift and
extreme difficulty will be encountered at next engine
rebuild.
(d) Clean out dowel holes and install new
dowels.
f. Installation of flywheel and clutch assemblies.
Refer to paragraphs 3-33 and 3-15.
Figure 3-168. Flywheel housing indicator gage
installation.
either up or down, whichever is necessary, one-half
distance of total indicator reading in order to center
vertically.
Figure 3-169. Flywheel housing indicator gage.
(5) Check housing bore circumference; total
run out must not exceed 0.010 inch.
3-35. Oil Pan
(6) After readings are within limits, tighten
a. General. The oil pan is located beneath the
capscrews alternately and evenly to 80/100 ft.-lb. And
engine block and contains the oil used for lubricating the
recheck total runout.
moving parts of the engine.
e. Inspecting Flywheel Housing Face.
b. Removal
(1) Attach indicator gage as shown in figure
(1) Drain oil from crankcase (see lubrication
order).
(2) Push crankshaft forward to take up end
(2) Remove engine assembly (para 2-9),
clearance.
and flywheel housing (para 3-34).
(3) Turn crankshaft to obtain readings on
(3) Turn engine upside down.
housing face.
(4) Remove all mounting capscrews,
Note. Take up crankshaft end clearance in same
lockwashers and flatwashers from oil pan.
direction each time.
(5) Lift oil pan and gasket from block (fig. 3-
(4) Total flywheel housing face runout must
not exceed 0.008 in.
(5) If both bore and face runout readings
are within limits and dowels were removed, ream dowel
3-60
