Isuzu A-4JB1 - Governor Adjustment; Injection Quantity; Full Adjustment

FUEL SYSTEM
144
INJECTION QUANTITY
GOVERNOR ADJUSTMENT
Full Adjustment
Pre-Stroke: No.1 Plunger 3.3 ± 0.05 mm
Injection Order: 1-3-4-2 (Plunger numbered from the drive side)
Tappet Clearance: More than 0.3 mm for all cylinders
* This performance drawing for A-4JB1PAW-01 only.
Injection
Maximum
Adjusting
Rod Position Pump Speed Quantity
Variation Fixed Remarks
Point (mm) (rpm) (cc/1000
(%)
Strokes)
A 8.3 1,500 64 – 65 ± 2.5 Lever Basic
About 6.6 500 9.5 – 13.5 ± 15.0 Rack
Adjust max. var. bet. cyl. at R = 6.6.
Adjust governor as per. gov. adj. spec.
D Above 14.0 100 (70 – 85) — Lever
Confirm that the timing of D is
advanced 1°30’ from A.
Idle-sub spring setting
Governor spring setting
D
A
Above 14.0
13.0
9.3
9.1±0.1
8.3
7.8±0.1
6.3
4.3±0.4
0 250160±30 500
C
(610)
(1535)
1545
1610
Rack position (mm)
Pump speed (rpm)
500