Wiring Diagram Cat 277b - Jan 29, 2009 · I work at a cat dealer as the a CCE field mechanic. The undercarriages are fairly easy to work on. The best way to remove the track is to detension it remove the track drive (squirrel cage) and usually you can kick the track off the rear idler first then the front idler.. Sitemap. Uncategorized. Caterpillar CAT IT28G Integrated Toolcarrier Parts Manual Download; Caterpillar 16G Motor Grader WORKSHOP SERVICE REPAIR MANUAL DOWNLOAD. Look at the electrical solenoid on the injection pump, there are two versions of the solenoid, I'm thinking you have a big pull solenoid that has to remain in the pulled position to keep the engine running, if it doesn't pull its full distance and bottom out it will pull too many amps and blow the fuse..