Isuzu N-Series. Manual — part 397
6C-66 FUEL SYSTEM
Governor Adjustment
N6A1659E
FUEL SYSTEM 6C-67
Injection Volume and Governor Performance Diagram
Injection Volume
Identification Numbers
: 107492-1062 / 107492-1120 / 897212-9350 (ISUZU NO.)
[4HE1-TC Engine]
Pre-stroke
: No. 1 plunger 4.0
±0.03 mm (0.1575±0.0012 in)
Injection order
: 1 — 3 — 4 — 2 (interval 90
°±15′) Plungers are numbered from the Governor side
Tappet clearance
: Bolt adjustment type
: More than 0.3 mm (0.0118 in) for all cylinders.
: Shim adjustment type
: Manually rotate the camshaft 2 — 3 times and confirm that it
rotates smoothly.
Adjusting point
Pump speed (r.p.m.)
Injection volume (cc/
1000 strokes)
Variance (%)
Remarks
1,000
107.5
±1.6
±4
Basic
H
400
22
±1.5
±14
Z
510
—
—
Basic
A
1,000
107.5
±1
—
B
1,400
121.5
±2
—
C
500
78
—
D
1,400
103
—
I
150
235
—
6C-68 FUEL SYSTEM
Governor Adjustment
N6A0959E
FUEL SYSTEM 6C-69
Injection Volume and Governor Performance Diagram
Injection Volume
Identification Numbers
: 10749-1032 / 107492-1130
[4HE1-TC Engine]
Pre-stroke
: No. 1 plunger 4.0
±0.03 mm (0.1575±0.0012 in)
Injection order
: 1 — 3 — 4 — 2 (interval 90
°±15′) Plungers are numbered from the Governor side
Tappet clearance
: Bolt adjustment type
: More than 0.3 mm (0.0118 in) for all cylinders.
: Shim adjustment type
: Manually rotate the camshaft 2 — 3 times and confirm that it
rotates smoothly.
Adjusting point
Pump speed (r.p.m.)
Injection volume (cc/
1000 strokes)
Variance (%)
Remarks
900
78
±1.6
±4
Basic
H
400
19
±1.5
±14
Z
500
—
—
Basic
A
900
78
±1
—
B
1,450
89.5
±2
—
C
500
67.5
—
D
1,450
91.5
—
E
700
78
—
I
150
220
—
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