TM-9-2815-213-34
ENGINE, DIESEL, WITH ACCESSORIES CUMMINS MODEL V8-300 (2815-910-8217)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING DIRECT SUPPORT AND GENERAL SUPPORT REPAIR PARTS LIST AND DEPOT MAINTENANCE ALLOWANCES)
FEBRUARY 1972
TM-9-2815-213-34 - Page 47 of 192
•TM 9-2815-213-34
Figure 3-32.
Valve head and collet check.
Figure 3-33. Crosshead guide cheek.
(5) Check valve guide protrusion to limit of
0.695/0.710 inch.
h.
Valve Springs
(fig. 3-35).
NOTE
Weak valve springs may cause flutter
which results in excessive wear on both
valve and seat. Valve flutter interferes
with valve timing and may cause valve to
strike the piston head. Weak springs
may also cause valve warping, cracking
and breaking.
(1) Using a spring tester capable of very
accurate measurements of spring lengths and applied
load, check springs against limits speciflied in repair and
rebuild standards, paragraph 3-183.
NOTE
A 1/32 inch spacer may be used under
valve spring when insert and valve have
been refaced.
(2) Replace springs if load is less than indicated
under "wear limits" at required compressed length.
Figure 3-34.
Valve guide check
Figure 3-35.
Valve spring test.
3-67.
Repair
a.
Resurface Cylinder Head.
Resurface head only
if it has been scratched, etched, or worn unevenly at
point of contact with gasket sealing areas.
(1) Remove a maximum of 0.006 inch of
material.
NOTE
The gasket surface should not deviate
from a true plane
b,
mote than 0.004-
inch.
3-18
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