HEAD COVER
Remove the head cover
to
gain access
to
the cylinder
head and valve system. Use the following procedure
to
service.
1.
Use a
10
mm socket wrench to remove head cover
mounting bolts and pull
off
head cover. See Figure
2.
Clean head cover. Be careful not to damage outer
sealing edge where gasket fits.
3. Clean cylinder head cover and cylinder head tho-
roughly where gasket rests. Use new gasket when
reinstalling and make sure breather assembly is
correctly installed in cylinder head cavity.
4. Place head cover in position and torque until all
bolts are tightened
to
the specified torque.
9-2.
BREATHER
ASSEMBLY
FIGURE
9-2.
HEAD COVER REMOVAL
CYLINDER HEAD
Remove the cylinder head for cleaning when poor
engine performance is noticed or
to
inspect the valves.
Use the following procedures
to
service.
1.
Lift
breather out of cavity in cylinder head.
2.
Remove lock nut and adjusting bolts from rocker
arms, then remove rocker arms and push rods.
3. Removecowling mounting bolts and lift
off
cowling.
4. Use a
12
mm socket wrench to remove the cylinder
head mounting bolts and lift
off
the head.
5.
Clean out all carbon deposits. Be careful not
to
damage outer sealing edge where gasket fits. The
head
is
made of aluminum and can be damaged by
careless handling.
6.
Use new head gasket and clean both cylinder head
and cylinder block thoroughly where gasket rests.
7.
Place head in position and follow head torque tight-
ening sequence shown in Figure 9-3. Start out
tightening all bolts to
11
ft-lb
(15
Nom), then tighten
to
the specified torque (see Torque Specification
section).
Vl-1036
FIGURE
9-3.
CYLINDER HEAD TIGHTENING
SEQUENCE
VALVE
SYSTEM
The engine in the
KV
generator set uses an overhead
valve design as shown in Figure 9-4.
A
properly func-
tioning valve system is essential for good engine per-
formance. Access
to
the valve system can be gained
by
removing the head cover and the cylinder head. Use the
following procedures
to
inspect and service the valve
system.
.
Warping can occur
if
the head
is
-1
removed while
hot.
Waif
until
the
engine has cooled before removing cylinder head.
9-2
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