1987/04/20 Caterpillar

Use Improved Heat Start Switch{1416}

Usage:

All Machines With Precombustion Chamber Engines

SUPPLEMENT: 04/04/88

SERVICE MAGAZINE; APRIL 20, 1987; PAGE 10; "Use Improved Heat Start Switch" on all machines with precombustion chamber engines. Disregard this article and make reference to the new article with the same title in this issue.

--------------- END SUPPLEMENT ---------------

The 8S7713 Heat Start Switch used on many models with precombustion chamber engines is no longer serviced. The 7N4160 Heat Start Switch can be used as a direct replacement. The 7N4160 Heat Start Switch provides better sealing against contaminants. The 7N4160 Heat Start Switch also has a contact action better suited for cranking applications where the starter solenoid is activated directly from the start switch. Such applications do not use a start relay.

Caterpillar Information System:

1987/04/20 Improved Fuel Priming Pump Used{1258}

1987/04/20 Fuel Injection Timing Adjustment{1250}

1987/04/20 Material Changed In Exhaust and Inlet Valves{1105}

1987/04/20 Serviceable Parts For New Fuel Ratio Control; Pressurize Control To Set Rack On 3406B Engines In Driltech Drill Rigs{1257,1258,1264}

1987/04/20 New Pipe Used Between Turbocharger And Aftercooler; Improved Turbocharger Compressor Housing Has Two Retaining Bolt Holes{1050,1061,1079}

1987/04/13 Initial Start Of Engine Using An EGB29P Governor/Actuator After Filling With Oil{1264}

1987/04/13 Checking Injector Synchronization On Engines Equipped With New 11.0 mm Injectors{1290}

1987/04/06 Longer Bolts With Spacers Now Used On Exhaust Manifolds{1059}

1987/04/06 New Idler Shaft And Sealing Washers Used In Front Gears And Accessory Drives{1206,1207}

1987/04/06 Rerate Plates And 4W5140 Engine Information Plate Available For Use When Rerating 3406B (PEEC) Truck Engines{0782,1250}

1987/04/06 Engine Identification Plate Information For 3406B (PEEC) Truck Engines{0782,1250}

1987/04/06 Improved Governor Performance{1264,1250}

1987/04/20 Moisture Cover Available For Start Switches{1416,1424}

1987/04/20 Microfiche Library Cross References Caterpillar Part Numbers With Expanded Product Line Part Numbers{7567}

1987/04/20 New Service Tools Available{0600}

1987/05/04 Products Equipped With Diagnostic Connectors Require Less Time For Electrical Troubleshooting{1400}

1987/05/04 Alternator "R" Terminal Wire Assembly Available For Wiring Harness Repair{1408}

1987/05/04 Alternator/Generator Output Test On The Engine{1401,1404,1405,1406}

1987/05/04 Testing The Starter On The Engine{1401,1450}

1987/05/04 New Rear Crankshaft Seal Groups Have Longer Service Life{1161,1202}

1987/05/11 Three Electrical And Electronic Training Aids Now Have Caterpillar Part Numbers Instead Of Form Numbers {0115}

1987/05/11 Service Parts Available For Air-Regulated 8T5190 Wrench Group {0700,4202}

1987/05/11 Black Light Leak Detection Kit Available For Oil, Fuel and Cooling Systems {0774,1250,1300,1350}

1987/05/11 The Caterpillar Fuel Flow Monitor System Available {0782,1000,1250}