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Page Title:
Exhaust Valves, Springs, Guides, and seats |
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 TM 10-3930-242-34
Apply pressure to end of valve spring compres-
tion freely by aid of the return spring only. DO
sor handle to compress valve spring (fig. 3-43).
NOT bend the return spring to bring about this
Remove the two-piece tapered spring lock (13,
condition.
(6) Install fuel rod (para 3-13).
(7) Install exhaust manifold, thermostat
housing, and thermostat (TM 10-3930-242-12).
cap, valve spring and spring seat.
(2) To remove the exhaust valve spring
with the cylinder head removed from the en-
seats
gine, use the following procedure:
a . General. The exhaust valves, springs,
(a) Support cylinder head on wood blocks
guide, and seat are mounted to the cylinder
2 inches above the workbench so as to keep the
head. It is possible, if occasion requires, to re-
cam followers clear of workbench.
move or replace exhaust valve springs without
(b) Remove fuel lines from injector and
removing cylinder head. The springs, however,
fuel connectors (para 3-14).
are normally removed when cylinder head is
(c) Remove the two bolts holding rocker
removed from engine block. Both methods are
arm shaft brackets to cylinder head. Lift rocker
covered in this section.
arms and brackets up and away from injector
b. Removal of Exhaust Valve Spring and
Valve.
(d) Remove fuel injector (para 3-14).
(1) An exhaust valve spring may be re-
(e) Remove exhaust valve spring from cy-
moved, without removing the cylinder head
linder head as previously outlined above. In ad-
from the engine, as follows:
(a) R e m o v e r o c k e r a r m c o v e r ( T M
10-3930-242-12).
(b) Bar engine over to bring valve and in-
jector rocker arms in line horizontally.
(c) Disconnect and remove fuel lines from
injectors and fuel connectors (para 314).
(d) Remove the two bolts holding rocker
arm shaft brackets to cylinder head and remove
brackets and shaft (para 3-15).
(e) Remove cylinder block air box cover so
that piston travel may be observed, then turn
crankshaft until piston is at top of stroke.
tor into rocker shaft bolt hole in cylinder head.
Figure 343. Removing exhaust valve spring.
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