TECHNICAL
DATA-B.12
Static Timing Position
The static timing position varies according
to
application, but can
be
obtained by referring
to
the first group
of
letters
and digits
of
the
fuel pump setting code (stamped on the fuel pump identification plate).
IOn the latest
4.108
engines the setting codes start
with
the fuel pump part number followed by
the
two
code letters. Only
the
Itwo
code letters are used
in
the table for identification purposes.
(USING TIMING TOOL MS67B)
ALTERNATIVE DROP VALVE METHOD
First
Group
of
Engine
Checking
Fuel Pump
Marking
Static
Timing
Piston
Displacement
Fuel
Pump
Code
Angle
(Degrees)
Angle
(Degrees)
(Degrees)
BTDC
in
(mm)
BTDC
4.99
AH28
282
29S
26
0.226
(5,74)
BH26
287
300
26
0.226
(5,74)
CH3S
280~
290 19
0.120
(3,05)
DH19
287
300
26
0.226
(5,74)
LH20 }
282
292
20
0.134
(3,40)
LH26
LH29
281
292
22
0.160
(4,06)
MH26
281
290
18
0.110
(2,79)
4.107
CH3S
280~
290
19
LH23}
0.120
(3,05)
LH28
282
292
20
LH29
0.134
(3,40)
LH31
(exceptions
below)
LH31
1900/2/2770
}
LH31
1900/2/3130
281
292
22
0.160
(4,06)
LH31
1900/9/1880
MH27}
PH28
281
290
18
0.110
(2,79)
PH30
PH34
280
290
20
0.134
(3,40)
iEH
4.108
EH34E
281
290
18
0.11
°
(2,79)
EH39
LH30
281
292
22
0.160
(4,06)
IpH
281
290 18
0.1 0
(2,79)
PH23E
(exceptions
281
290 18
0.110
(2,79)
PH25E
below)
PH2SESOO/S/24S0}
PH2SESOO/9/1990
279~
290
21
0.150
(3,81)
PH2SESOO/9/2090
PH27
~
-
281
290
18
'0.110
(2,79)
i PH28
(exceptions
PH30 be/ow)
PH30/S00/5/24SO }
PH30/S00/6/1S70
279t
290
21
0.150
(3,81)
PH30/S00/9/1990
PH30/S00/9/2090
:RH
1
RH30E
279~
290
21
0.150
(3,81)
SH33E
ITH }
281
291
20
0.134
(3,40)
ITH23E .
Note:
For 4.107
and
4.99
mechanically
governed
engines
r
aled
above 3,000
and
2,SOO
rev I
min
respectively, the
static
timing
is
altered
to
22'
B.T.C.D.'
piston
displacement
0.160 in
(4,06
mmJ.
For
4.108
engines
prior
to
engine
numbers
108U15973
and
108UD20214, the
static
timing
was
19'
B.T.D.C.·,
piston
displacement
0.120 in (3,05
mm).
When re,
setting
these pumps,
it
is
advisable
to
set
at
the figures
quoted
in
above
table.
For 4.107
industrial
engines
having
a fuel
pump
coding
of
PH30
and
an
idling
speed
at
1,000
rev/min,
the
static
timing
is
21'
B.T.D.C.
and
a
piston
displacement
of
0.147 in
(3,73
mm).
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