1988/04/04 Caterpillar

Use Improved Heat Start Switch{1416}

Usage:

All Machines With Precombustion Chamber Engines

The 8S7713 Heat Start Switch used on many products with precombustion chamber engines is no longer serviced. The 7N4160 Heat Start Switch can be used as a 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.

The new switch is longer than the former switch. Therefore, in some applications, the new switch is not a direct replacement for the former switch and may require 5K1928 Bosses to complete the installation. Use one boss on each mounting bolt of the dash panel to provide clearance for the new switch.

Caterpillar Information System:

1988/04/04 Method To Reduce Indicator Contact Point Breakage{0760}

1988/04/04 Sealed Beam Halogen Lamps Are Available{7309}

1988/03/28 Polarity Corrections On Wiring Diagrams{4450}

1988/03/28 New 1U6602 Tachometer Group Available{0775,0781}

1988/03/21 New Power Pad Housings With Needle Bearings Used In Fuel Injection Control Groups{1264}

1988/03/21 New Publication Available-"Diesel Fuels And Your Engine"{0374,0375,0645}

1988/03/21 Service Tools For Reintjes Marine Gears{0723}

1988/03/14 New Connecting Rod Assembly Used{1218}

1988/03/14 New Auxiliary Water Pump Group Used{1371}

1988/03/14 Use The Correct Oil In Spark-Ignited Engines{1300}

1988/03/14 Magnetic Switches (Starter Relays) Improved{1450}

1988/03/14 Be Sure Battery Cable-To-Starter Connection Has Correct Torque{1453}

1988/04/04 Stepped Compression Ring Temporarily Used{1214,1215}

1988/04/04 Fuel Ratio Control Diaphragms And Settings On 3161 Governors{1278}

1988/04/18 Extraction Tools For "Live Oil Sampling"{7770,0770,0781,0783,0784}

1988/04/18 Some Components Of The Variable Pulley And Adjustable Pulley On The Kent-Moore Fuel Injection Test Bench Are Available From Caterpillar{0782}

1988/04/18 1" 8T9141 Offset Sledging Wrench Available{0602}

1988/04/18 How To Identify Failures To Electric Jacket Water Heaters{1383}

1988/04/18 Former Exhaust Valve Bridge For Jacobs Brake® Interferes With 40 mm Nozzle Adapter; New Bridge Used{1119,1100}

1988/04/18 Modification To Prevent Oil Leaks Around Governor Control Shaft{1265,1287}

1988/04/25 New 1U8115 Generator Test Lead Set With Insulated Tips {0785}

1988/04/25 New Diaphragm For Brakesaver Control Valve {1159,1155}

1988/04/25 New Socket In Valve Rocker Arms Provides Lubrication For Inlet Valve Seats {1103,1105,1123}

1988/04/25 Improved RH Watercooled Exhaust Manifold And Exhaust System Sealing {1059,1070,1061,1050}