SUPPORT-EXHAUST 9N1943 - Caterpillar

SUPPLEMENT: 04/01/91Service Magazine; May 4, 1987; Page 9; "Products Equipped With Diagnostic Connectors Require Less Time For Electrical Troubleshooting".Disregard this article and make reference to the article with the same title in this issue.--------------- END SUPPLEMENT ---------------SUPPLEMENT: 08/24/87SERVICE MAGAZINE; MAY 4, 1987; PAGE 9; "Products Equipped With Diagnostic Connectors Require Less Time For Electrical Troubleshooting."The motor graders that follow also have the diagnostic connector. 120G: 87V8360-Up, 11W1251-Up, 61W591-Up, 2AB62-Up
130G: 74V2321-Up, 12W1082-Up, 59K82-Up
140G: 72V10334-Up, 13W741-Up, 50H1261-Up
160G: 4JD141-Up
12G: 61M12027-Up, 3WC1067-Up
14G: 96U7046-Up, 3L193-Up
16G: 93U2679-Up
--------------- END SUPPLEMENT ---------------Since the introduction of the D8L Tractor, all new products and most product updates are built with the Caterpillar Corporate wiring scheme. There are two outstanding features to this approach: 1) commonality of state-of-the art components that are, 2) wired in a common fashion.
This means that all corporate components must now meet strict Caterpillar Engineering standards for its product application. The result is greater component reliability. Also, fewer part numbers are required because the same part is used from model to model. Example: Only one main power relay is required to service all 24V products. Previously, many of Caterpillar's components were "off the shelf" depending upon what was available.
A common approach to wiring means that all components are wired in the same manner. Example: The key switch turns on the main power relay which in turn powers lighting and all accessories. Should electrical troubleshooting be required, less time is required because the serviceman needs only be acquainted with one basic circuit configuration. This configuration is the same regardless of model or model family.
The benefits are: greater component reliability, fewer part numbers need to be stocked, and less troubleshooting time. Finally, there is greater machine availability with less repair cost to the user.
Many users and dealers are overlooking a valuable troubleshooting and preventive maintenance feature found on these machines. The diagnostic connector brings all relevant troubleshooting test points of the entire starting and charging system into one convenient location. One service person can troubleshoot this complete system without removing engine guards and panels to look for a given test point. All starting and charging components such as relays, switches, circuit breakers, starters, alternator, and associated wiring can be checked from the diagnostic connector with a 6V7070 Multimeter, Special Instruction SEHS7768, and the appropriate electrical schematic for the product.
System analysis is made even easier with the service tool, 6V2150 Starting/Charging Analyzer. This rugged field tool checks the entire starting and charging system in less than five minutes. It makes troubleshooting easy for the inexperienced serviceman. For the knowledgeable serviceman, it zeros him in to the fault quickly. Light emitting diodes (LEDs) are either on or off to indicate circuit condition and they replace the 6V7070 Multimeter.
Use of the 6V2150 Analyzer as a preventive maintenance tool at 3 to 6 month intervals will often show a component that is beginning to degrade. Maintenance can then be conveniently scheduled, reducing expensive unscheduled downtime.
For more information regarding the 6V2150 Analyzer refer to Special Instruction SEHS7768. The diagnostic connector is