TM 5-4310-276-14
(4) Inspect the
roller bearings for
freedom of
operation, corrosion, chipped or missing rollers.
Drycleaning solvent, P-D-680, used to
(5) Replace any damaged or defective part.
clean parts is potentially dangerous to
c. Reassembly and Installation.
personnel and property. Avoid re-
(1) Install new crankshaft near oil seal.
peated and prolonged skin contact.
Do not use near open flame or exces-
ing cone (5).
sive heat.
(3) Install crankshaft (4) into engine.
(1) Clean crankshaft and
bearings with
dry-
(4) Install key (3), bearing cone (2) and bear-
ing cup (1).
(2) Inspect the crankshaft for cracks, breaks,
(5) Install the
bearing cap assembly (para. 6-
run-out, damaged keyway, gear for chipped or miss-
17). Insure the
crankshaft endplay is
proper.
ing teeth, excessive wear to bearing surfaces or evi-
(6) Install the piston and connecting rod as-
dence of overheating. Inspect threaded end for dam-
aged or stripped threads.
(3) Inspect crank journal for scoring, pitting,
(8) Install the
cylinder head assembly (para.
excessive wear or evidence of overheating. Mea-
surements for crankshaft journals are shown in
ten with mounting bolts.
(10) Install belts and belt guard.
(11) Service crankcase with oil.
Section X. CRANKCASE ASSEMBLY
(8) Remove the engine speed governor control
The crankcase is that part of the engine which
supports and encloses the crankshaft, provides a
reservoir for the lubricating oil and acts as a sup
(10) Remove contact assembly and capacitor.
port for other accessories.
(a) Unsnap spring clips and remove the ac-
cessory case cover.
(b) Tag and disconnect electrical leads as
6-23. Crankcase Assembly
a. Removal and Disassembly.
necessary.
(c) Remove screws and remove contact as-
(1) Remove V-belt guard and V-belts.
(2) Drain
crankcase oil into suitable contain-
sembly and capacitor.
er.
(3) Remove engine mounting bolts and move
(12) Remove rocker arms, cylinder head, push-
engine to a suitable work area.
rods and housing, valves and valve springs (para. 6-
(4) Remove fuel lines from fuel filter and un-
screw filter from fuel pump.
(5) Disconnect fuel line into fuel pump, re-
(14) Remove piston and connecting rod assem-
move two screws and remove pump and discard gas-
ket.
(6) Refer to
table 4-2 and
remove the
carbu-
retor and throttle controls.
(16) Remove the camshaft and valve tappets
(7) Remove intake manifold and air cleaner
(17) Remove the crankshaft assembly (para.