Usage:
3176 (2YG, 7LG),
3176B (9CK),
C-10 (2PN),
C-12 (1YN) Truck Engines
Reference: Service Manual Module, Systems Operation Testing And Adjusting, 3176 Diesel Truck Engine, SENR3909. Service Manual Module, Systems Operation Testing And Adjusting, 3176 Diesel Truck Engine, SENR5108. Service Manual Module, Systems Operation Testing And Adjusting, 3176B Diesel Truck Engine, SENR5561. Service Manual Module, Systems Operation Testing And Adjusting, C-10 And C-12 Truck Engine, SENR6593.
No changes have been made to "Unit Injector Adjustment" procedure for these truck engines. This article is intended as a reminder to take care to correctly follow "Unit Injector Adjustment" procedure. An incorrect adjustment may result in injector seizures. The "Unit Injector Adjustment" procedure follows:
1. Put No. 1 piston at top center (TC) on the compression stroke.See the topic, Finding Top Center Piston for No. 1 Piston in the appropriate Service Manual, Systems Operation Testing And Adjusting module.
2. Turn the unit injector adjusting screw CW (clockwise) until contact is made with the unit injector.
3. Turn the adjusting screw CW an additional 180 degrees (1/2 turn).
4. Hold the adjusting screw in this position and tighten the locknut to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
5. Make an adjustment to the unit injectors on cylinders 3, 5, and 6.
6. Remove the timing bolt and turn the flywheel 360 degrees in the direction of engine rotation (counterclockwise). This will put No. 1 piston at top center (TC) on the exhaust stroke.
7. Make an adjustment to the unit injectors on cylinders 1, 2, and 4.
8. Remove the timing bolt from the flywheel when all the unit injector adjustments have been made, and reinstall the timing cover.
For additional detail please refer to the appropriate Service Manual, Systems Operation Testing and Adjusting module.