Isuzu A-4BG1 Workshop Manual page 38

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II II I I I I I II II II II II I I I I I I I I j
2-12 MAINTENANCE
- Holder
8
0
- Seat
f
-Spring
l-l
9. Remove the delivery valve holder from the No. 1
+I)
plunger.
Note:
Injection pump injection timing will vary among identi-
cal engines contact your machine supplier or nearest
ISUZU engine service outlet for the specifications applic-
able to your engine.
These specifications have been set by
ISUZU
and the
OEM manufacturer.
l-l
*c
10. Reinstall the delivery valve internal parts (seat,
spring, and valve) to the delivery valve holder.
,
11. Reinstall the delivery valve holder assembly to the
No. 1 plunger and tighten it to the specified torque.
kg.m (lb.ft)
Delivery Valve Holder
Torque
4-4.5 (29-33)
e
.
12. Install the No. 1 cylinder injection pipe and tighten it
_ -
to the specified torque.
V 7
kg.m (lb.ft)
0
Injection Pipe Nut Torque 2.9-3.3 (2 l-24)
Note:
DO NOT OVERTIGHTEN THE INJECTION PUMP BODY.
THE INJECTION PUMP BODY IS MADE OF ALUMINUM.
OVERTIGHTENING WILL DISTORT THE INJECTION
PUMP BODY SHAPE AND ADVERSELY AFFECT CON-
TROL RACK OPERATION.
Adjusting Procedure
1. Align the pointer and the specified timing mark on
the crank pulley.
2. Perform the operations
described on page 2-10, 11,
paragraphs 3, 4,5, 6.
3. Loosen the four injection pump fixing nut.
4. To advance the timina
Pivot the injection pump at the pump driveshaft
toward out.
To retard the timing.
&ot the injection pump at the pump driveshaft
toward in. (toward the cylinder block)
Reference; the 1 mm misalignment between the two
setting mark lines corresponds to about 2' in
crankangle.