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

—