TM 9-2320-387-24-2
1523. ENGINE INJECTION PUMP TIMING
This task covers:
a. Timing Check
b. Timing Adjustment
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 11
Manual References
TM 9-2320-387-10
TM 9-2320-387-24P
Special Tools
Timing gauge (Appendix B, Item 26)
Dynamic timing meter (Appendix B, Item 27)
Materials/Parts
Metallic wool (Appendix C, Item 83)
Personnel Required
One mechanic
One assistant
Equipment
Condition
l Hood raised and secured (TM 9-2320-387-10).
l Engine access cover removed (para. 10-22).
l Companion seat and battery box cover removed
(para. 10-43).
General Safety Instructions
Never adjust timing while engine is running.
Maintenance Level
Direct support
a. Timing Check
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
15-42
NOTE
Magnetic pickup receptacle on timing bracket must be correctly
positioned or timing meter will not register correctly.
Insert timing gauge into magnetic pickup receptacle (8) on timing bracket (1).
Rotate timing gauge so pointer on gauge fits into Top Dead Center (TDC) notch (9) in timing bracket
(1).
If pointer on gauge does not fit exactly into TDC notch (91, bend magnetic pickup receptacle (8) until
pointer on gauge fits exactly into TDC notch (9).
Remove timing gauge from pickup receptacle (8) on timing bracket (1).
NOTE
End of magnetic pickup must be 0.06 in. (1.5 mm) from torsional
damper.
Install magnetic pickup (71 into magnetic pickup receptacle (8) and connect pickup lead (6) to
dynamic timing meter.
NOTE
Clamp-on pickup must be used on a straight section of tube no
farther than 4 in. (10 cm) from injection nozzle.
Clean cylinder number one injection line (2) with metallic wool.
CAUTION
Do not overtighten clamp-on pickup or damage to pickup will result.
Install pickup (4) on injection line (21.
Connect ground clip (31 to fuel injection line (2) and connect pickup lead (5) to timing meter.
Route power leads of timing meter into battery compartment and connect red power lead (111 to
positive battery terminal (12) on rear battery (14).
Connect black ground lead (10) to negative battery terminal (131 on rear battery (14). Display should
light up and read: SE-l 20.0.
