TM 9-6115-604-34
NAVFAC P-8-633-34
(6)
Visually inspect the followers (12 and 13) for cracks.
(7)
Repeat steps (2) through (6), above, for each cylinder.
(8)
Replace all defective parts in accordance with steps b through d, below.
b.
Remove. (See Figure 9-13.)
(1)
Separate fuel block connections (13, Figure 6-35) from brackets (16) by removing hexagon head
capscrews (11) and lockwashers (12).
(2)
Remove the rocker arms in accordance with paragraph 9-5. Match-mark and withdraw the push rods (1
and 2, Figure 9-13) from the cylinder head bores.
(3)
Remove the capscrews (3 and 4), lockwashers (5), flat washer (6), and remove the cover (7) and gasket
(8).Discard the gasket.
(4)
Match-mark the shaft (14) to the cylinder number, remove the capscrews (9), flat washers (6), and the
follower and shaft assembly.
(5)
If damaged, remove the bushings (10) from the cylinder block (6) Match-mark the followers (12 and 13) to
the cam follower shaft (14), remove the retaining rings (11), and remove the followers from the shaft.
Discard the retaining rings.
(7)
Remove the cup plugs (15) from the cam follower shaft (14), and discard the plugs.
(8)
Remove the roll pins (1 6), press out the cam follower pin (17 or 1 9), and remove the cam follower rollers
(18 or 20).
c.
Inspect and Repair. (See Figure 9-13 and Figure 9-14).
WARNING
Dry cleaning solvent PD-0, Type Ill, or equivalent, Is flammable, and moderately toxic to the
skin, eyes, and respiratory tract Assure adequate ventilation. Skin, eye, and respiratory
protection Is required to avoid Injury to personnel.
WARNING
Compressed air used for cleaning or drying can create airborne particles that may enter the
eyes. Pressure shall not exceed 30 psi (207 kPa). Wearing of goggles Is required to avoid
Injury to personnel.
(1)
Clean all parts in dry cleaning solvent PD-480, Type II, or equivalent, and blow dry with compressed air.
(2)
Check for bent push rods (1 and 2, Figure 9-13) using V blocks and a dial indicator. Replace push rods
that exceed 0.063 inch (1.60 mm) TIR. Using an arbor press and V-block straighten acceptable push rods
to within 0.025 inch (0.64 mm) TIR.
(3)
Check the ball-ends of the push rods for wear using Prussian blue compound and a new socket (21).
Replace the push rods if the blueing patten does not show in at least 80 percent of the socket area.
(4)
Check the socket ends of the push rods for wear using Prussian blue compound and a new rocker arm
adjusting screw (16, Figure 9-2). Replace the push rods if the blueing pattern does not show in at least 80
percent of the socket area.
(5)
Check the cam follower shafts (1 4, Figure 9-13) for cracks and surface imperfections using fluorescent
magnetic inspection in accordance with MIL-1-6868. Replace any follower shafts that are defective.
(6)
Check the follower shafts (1 4) for coring and grooving. Replace any shaft scored or grooved over 0.002
inch (0.05 mm) in depth.
(7)
Check the outside diameter of the cam follower shafts (1 4) for wear and out-of-round. Replace the shafts
if the minimum diameter is not in accordance with Table 1 -4.
(8)
Check the followers (12 and 13) for cracks in accordance with step (5), above. Replace any followers that
are defective.
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