TM 9-6115-604-34
NAVFAC P-8-633-34
h.
Make necessary repairs in accordance with paragraphs 9-5 through 9-11.
i.
Install the valve covers in accordance with paragraph 9-11.
9-5.
REMOVAL OF CYUNDER HEAD ASSEMBUES, (S ee Figure 9-1 and Figure 9-2).
a.
Drain engine coolant in accordance with the Operator and Organizational Maintenance Manual.
b.
Remove the water filter mounting heads in accordance with the Operator and Organizational Maintenance
Manual.
c.
Remove the thermostat housing assembly in accordance with the Operator and Organizational Maintenance
Manual.
d.
Remove the aftercooler in accordance with paragraph 9-42.
e.
Remove the exhaust manifolds in accordance with paragraph 9-44.
f.
Remove the intake manifolds in accordance with paragraph 9-43.
g.
Remove the fuel manifolds in accordance with paragraph 6-25.
h.
Remove the rocker arms and crossheads as follows:
(1)
Remove the capscrew and lockwasher (1, Figure 9-2), washer (2), two hexagon head capscrews (3),
lockwashers (4), and washers (5) from the rocker arm cover (6).
(2)
Remove the rocker arm cover (6) and discard the gasket (7).
(3)
Relieve the spring pressure on the rocker arm assembly by loosening the locknuts (15), and backing
out adjusting screws (16) one or two turns.
(4)
Match-mark the rocker arm shaft (11) to the rocker arm housing (20), and remove the capscrews (8
and 9), and washers (10).
(5)
Using both hands, lift straight up on the rocker arm shaft (11) to dear the ring dowel (24), and remove
the rocker shaft and arm assembly from the rocker arm housing (20).
(6)
Match-mark the exhaust rocker arm (12), injector rocker arm (13), and intake rocker arm (14) to their
respective positions on the rocker arm shaft (11), and remove rocker arms from shaft. Remove the
locknuts (15) and adjusting screws (16) from the rocker arms.
(7)
Match-mark the valve crossheads (8, Figure 9-1) as to cylinder head and crosshead guide position,
and remove the crossheads by pulling them straight up off of the crosshead guide (24). Remove the
nuts (10) and adjusting screws (9) from the crossheads.
(8)
Remove the retainers (17, Figure 9-2) and tap the water transfer tubes (22) into the rocker arm housing
(20) using ST-1319 driver.
(9)
Remove five capscrews (18), washers (19), capscrew (29), and washer (10), and remove the rocker
arm housing (20) and gasket (21). Discard the gasket.
(10)
Remove the water transfer tubes (22), and remove and discard the packings (23).
i.
Remove the engine poppet and injector push rods and place them in a numbered holder so that they will be
installed in the same follower holes as removed.
CAUTION
DO NOT remove the cylinder heads without removing the injectors.
Injector tip damage could occur during cylinder head removal or
subsequent handling.
j.
Remove the fuel injectors and with seal seats in accordance paragraph 6-13.
k.
Remove the fuel manifold accordance with paragraph 6-25.
I.
Remove six capscrews (11, Figure 9-1), and washers (12) holding the cylinder head (7) to cylinder block
NOTE
Cylinder head weight is approximately 63 pounds (28 kg). Two
persons may be required to lift the cylinder head.
m.
Lift the cylinder head (7) to dear the dowel pins, and remove the cylinder head. Remove and discard the
gasket (13), and grommets (14,15,16, and 17).
n.
Remove the other cylinder heads following the above steps as necessary.
9-4
