AIR CONDITIONER AR 2554820 - Caterpillar

And 3306 Vehicular Engines (7Z, 8Z, 13Z)Use the new 6V4186 Fuel Pump Timing Pin to check fuel injection pump timing and to center the rack on the above engines. The new pin is 90 mm (3.5") long and can be used in all applications of the above engines.
The former 7N1048 Fuel Pump Timing Pin is 210 mm (8.3"). The former pin is too long to be used in some applications.
The 7N1048 Pin can be cut to a length of 90 mm (3.5") if desired. This pin is hardened. Use a grinder or grit edge saw blade to cut the pin.