TM 5-3895-346-14
CYLINDER BLOCK
ENGINE OVERHAUL
with serial numbers 2D-4010, 3D-117, and 4D-348.
New service replacement cylinder block assemblies include the main
bearing caps, bolts and washers, and the camshaft bearings
(bushings). The dowels and the necessary plugs are also included.
Since the cylinder block is the main structural part of the engine, the
various subassemblies must be removed from the cylinder block
when an engine is overhauled.
The hydraulically operated overhaul stand provides a convenient
support when stripping a cylinder block. The engine is mounted in
an upright position. It may then be tipped on its side, rotated in
either direction (90or 180 where it is locked in place and then, if
)
desired, tipped back with either end of the oil pan side up.
Remove and Disassemble Engine
Figure 5. Vertical Oil Passages in Top of
Before mounting an engine on an overhaul stand, it must be
Cylinder Block
removed from its base and disconnected from the transmission or
other driven mechanism. Details of this procedure will vary from one application to another. However, the
following steps will be necessary:
1.
Drain the cooling system.
2.
Drain the lubricating oil.
3.
Disconnect the fuel lines.
4.
Remove the air cleaner and mounting bracket.
5.
Remove the blower on in-line engines.
6.
Disconnect the exhaust piping and remove the exhaust manifold(s).
7.
Disconnect the throttle controls.
8.
Disconnect and remove the starting motor, battery-charging generator, and other electrical
equipment.
9.
Remove the radiator, fan guard, and other related cooling system parts.
10.
Remove the air box drain tubes and fittings.
11.
Remove the air box covers.
12.
Disconnect any other lubricating oil lines, fuel lines, or electrical connections.
13.
Separate the engine from the transmission or other driven mechanism.
14.
Remove the engine mounting bolts.
15. Use a spreader bar with a suitable sling and adequate chain hoist to lift the engine from its base
(Fig. 6). To prevent bending of the engine lifter brackets, the lifting device should be adjusted so the lifting
hooks are vertical. To ensure proper weight distribution, all engine lifter brackets should be used to lift the
engine.
CAUTION
Do not lift an engine by the webs in the air inlet opening of the cylinder block.
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