TURBOCHARGER GP 3539900 - Caterpillar

Introduction
This instruction gives a description of the 6V-4180 Timing Fixture Group. This instruction also has a tool selection chart, installation and use procedures. Specifications for checking the off-engine fuel injection pump timing dimension setting for all forged body and compact fuel systems are also included.The off-engine timing dimension is checked and adjusted to compensate for wear in the fuel injection pump camshaft and/or the lifters. This will ensure that the point of fuel injection is correct. If the timing dimension is too small, fuel injection will be early, and, if the timing dimension is too great, fuel injection will be late.6V-4180 Timing Fixture Group
Illustration A.
Illustration B.Some of the shafts in the tool group provide for a positive clamp to the fuel injection pump camshaft. Illustration (A) shows a shaft clamped around the outside of the camshaft. Illustration (B) shows a shaft being installed (expanded) in the center bore of a camshaft.The 6V-4180 Timing Fixture Group contains the tools necessary to check the off-engine fuel injection timing dimension setting of current and most non-current fuel injection pumps. The tools are conveniently stored in 9S-6332 Box Assembly (1). Inside of box assembly (1) are a 6V-4181 Tool Holder Block and a 9S-8105 Block.This tool group has twelve shafts, four pointers and an easy-to-read timing plate (31). The two basic pointers (19) and (27) are reversible; they are located with two dowels and attach to the pump housing with one bolt. The 1P-7420 Pointer (27) can be used to center the rack by sliding the rack out against the counterbore in the pointer.In addition to the parts supplied with the 6V-4180 Tool Group, some additional parts, (32) to (41) are needed for certain applications. The tool selection chart lists the tools needed to check the off-engine timing dimension setting. The chart is organized according to fuel system type (forged body or compact) and also by engine model.Off-Engine Timing Dimension Setting Tool Selection ChartThe timing dimension setting specifications are given in charts located at the back portion of this instruction. These charts are organized by fuel system type (forged body or compact) and engine model.A glossary for abbreviations and footnote references used in these timing charts is also included in this instruction. Always refer to the footnotes for supplementary information, or possible exceptions. An explanation of the major chart listings follows. The timing dimension specifications given in this instruction are the latest and most up-to-date that were available at the time of this printing. If there is a difference between the information in this instruction, and information given in another publication, use the information in the publication that has the latest print date.1. Line (A) gives the engine model and bore size.2. Line (B) gives the static fuel injection timing BTC (before top center) of most engines. In some instances, this will help in identifying the engine as to vehicle, industrial, or marine application. Some engines that are built to special arrangements have special timing. Refer to the engine information plate