Service manual
VALVE
INSTALLATION
/VALVE
ADJUSTMENT
/INJECTION
TIMING
Installation
Install the valve and valve springs. Refer to the illustrations
and callouts shown below.
NOTE:
Be careful not to damage the spring and stem seal by
excessively compressing the spring when installing the valve
spring.
Mount the Cylinder Head Assembly and adjust the valve
clearances.
D.375in
·
(14.Bmm)
Witlllhe
retainer--
0
depresud
to
compress
lhe
spring,.
instaU
lhe
retainer
lock.
INSTALLING
SPRING
INSTAlliNG
THE
SPRING
RETAINER
TORQUING
THE
CYLINDER
HEAD
BOLTS
NOTE:
Cylinder head bolts must be retightened before adjust-
ing the valve clearances.
Tighten the cylinder head bolts according to the the sequence
shown. Make sure the engine is cold when this is done.
Before applying the specified torque to the bolt, loosen it
1/4
to 1/2
of
a turn and then apply the torque. Follow this proce-
dure according to the numbered sequence shown in the illus-
tration.
TORQUE
SPECIFICATIONS:
Bolts
11,
#2
·14.4 •
21.71b·fl
(2.0
•
3.0
Kg-m)
Bolts
#3;
#4,
#5,
116,
111,
118,
•
54;2
•
61.41b-ft
(7
.5
•
8.5
Kg~m)
ROCKER
SHAFT
HOLD-DOWN
BOLTS:
All main bolts are
14mm
across the bolt head flats.
All sub bolts are
12mm
across the bolt head flats.
Rocker shaft hold-down bolts are
12mm
across the bolt
head flats.
Rocker Cover
Hold
Down
Cap
Nuts-
(lOmm
socket) (snug)
CYUNDER
HEAD
BOLT
TIGHTENING
SEQUENCE
FRONT~.
SUB
BOLTS
NOTE:
The Rocker Assembly (Rocker Arms, Shaft
and
Stays)
are not
in
the engine when the cylinder head bolts are retight-
ened
in
tliis procedure.
VALVE
CLEARANCE
Firing
Order:
1·2
NOTE:
Removal
of
the engine's glow plugs will allow
for
easier rotation
of
the engine's crankshaft.
1. Set the piston in the cylinder to
be
adjusted at Top Dead
Center (T.D.C.)
of
the the compression stroke. Valve
clearance: 0.010 in (0.25 nun) cold for both intake and
exhaust valves.
2. Rotate the crankshaft observing the movement
of
the
valves
for
cylinder
#1
and place the piston at Top Dead
Center
of
its compression stroke. To confirm this, the
TDC
timing mark
on
the front crank shaft pulley should
be in alignment with the timing mark on the front gear
case.
3. Adjust the Intake and Exhaust valves for cylinder #1..
4. Rotate the engine crankshaft
180 degrees in the normal
direction
of
rotation and adjust the valves for cylinder #2.
Engines & Generators
12