SPROCKET 8Y0622 - Caterpillar

All Direct Injection 3300 Series Engines equipped with 7N8622 Air/Fuel Ratio ControlsSUPPLEMENT: 05/18/81SERVICE MAGAZINE, MARCH 23, 1981, PAGE 1.In the article, "6V2029 Fixture Group Available For Adjustment Of Air/Fuel Ratio Control," two changes are necessary. ...Change the subtitle to: "All Direct Injection 3300 Series Engines Equipped With 7N8622 Air/Fuel Ratio Controls."
...Change the first sentence to: "The 7N8622 Air/Fuel Ratio Control is used on some direct injection 3300 Series Engines equipped with scroll fuel systems.
--------------- END SUPPLEMENT ---------------The air/fuel ratio control is used on direct injection 3300 Series Engines with scroll-type fuel systems. All of the air/fuel ratio controls are adjusted to the same setting at the factory.
The 6V2029 Fixture Group holds the air/fuel ratio control for adjustment on the Caterpillar Fuel Injection Test Bench.
The complete procedure for adjustment of the air/fuel ratio control will be available to add to the Fuel Injection Test Bench Book.
Illustration 1. The 6V2029 Fixture Group.
Illustration 2. The air/fuel ratio control installed in a 6V2029 Fixture Group on a Caterpillar Fuel Injection Test Bench.