MTD 463 User Manual Page 153

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TM 5-6115-465-34
TO 35C2-3-446-2
NAVFAC P-8-625-34
TM06858B/06859D-34
Figure 3-43.
Timing Gear Relationships
3-53. CYLINDER HEAD AND ROCKER ARM
ASSEMBLY.
a. Removal.
(1) Refer to the Operator and Organizational
Maintenance Manual and remove the air cleaner as-
sembly, muffler and exhaust pipe assembly, intake
manifold, exhaust manifold, coolant control thermo-
stat, and injector nozzle holder assemblies.
(2) Remove nuts (1, figure 3-44) and lock-
washers (2) to remove lifting eyes (3).
(3) Remove nuts (4) and washers (5) to remove
rocker arm assembly (6) and push rods (7).
(4) Remove nuts (8) and washers (9).
CAUTION
Tap cylinder head lightly with a soft
hammer to loosen it. Do not pry on
contact surfaces.
(5) Lift cylinder head (10) from engine.
‘6) Remove and discard gasket (11).
b. Disassembly.
(1) Remove retaining rings (12) to remove
mounting blocks (13, 13A, and 13 B), spacers (14),
rocker arm (15) and springs (16) from shaft (18).
NOTE
Record position and quantity of spacers
(14) to facilitate assembly.
(2) Remove adjustment screws (17).
(3) Separate
Shafts (18) and bushings (19)
from center mounting block (20).
(4) Do not remove plugs (21).
(5) Using a valve spring depressor, depress
valve springs and remove locks (22 and 23).
(6) Release valve springs and remove spring
seats (24 and 25), valve springs (26 and 27), exhaust
valves (28) and intake valves (29).
(7) Remove and discard bonnets (30).
(8) Do not remove valve guides (31 and 32),
plugs (33), studs (34), fuel injector sleeves (36) and
seal (35) unless inspection reveals damage.
(9) Remove side plates (19, figure 3-51) from
cylinder block (22).
3-67
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