1980/10/13 Caterpillar

Improved Temperature Control Switch Used On Machines Equipped With Air Conditioner Units{7320}

Usage:

All Machines Equipped With Air Conditioner Units

Description of Change: A change has been made to the temperature control switches used with air conditioner units. The capillary tubes and diaphragm housings of the switches are now plated (have a cover layer) with tin for protection against corrosion. Formerly, the metal had no protection and corrosion damage was possible. Corrosion damage can cause a leak which lets the gas out of the switch, and the switch will not operate.

Adaptable As: Direct replacement. The part number of the 3V253 and 9P3498 Switches did not change. Identification of later switches can be made by the silver (grey) color of the tin plated parts. On earlier switches, these parts have the natural brass (yellow) color of the metal. The 9P3498 Switch is also the service replacement for the earlier 8P5346 Switch which is canceled.

Caterpillar Information System:

1980/10/13 6V3116 Adapter Group Is Available For Use On Fuel Injection Test Bench{0652,1251}

1980/10/13 New Tools Available For Installation Of Crankshaft Seals And Wear Sleeves{0622,1160,1161}

1980/10/13 6V2156 And 6V2157 Link Brackets Now Available To Lift Heavy Loads{0644}

1980/10/13 6V3184 Brush Group Available To Clean Crankshaft Oil Passages{0622,1202}

1980/10/06 New Breather Groups Used{1317}

1980/10/06 New Timing Advance Weight Used{1272,1288,1286,1264}

1980/10/06 Fretting Material Must Be Removed Before Installation Of New Bearings{1202,1203,1218,1219,1201,1230}

1980/09/29 Use Starter To Turn Crankshaft For 30 Seconds Or Until Oil Pressure Gauge Shows Pressure, Before Engine Is Started{1300,1450}

1980/09/29 Some Test Procedures And Specifications Changed For 9L6884 Fuel Injection Nozzle Assemblies{1254,0651}

1980/09/29 Woodward 2301 Speed Control (8N1731 Speed Control Group) Can Be Adapted For Use As Field Test Instrument{0651,1264,1265,1289}

1980/09/29 Improved Poppet Valves Used In Plate And Valve Assembly Of Transmission Control Group{3009}

1980/09/22 Install A New Oil Filter Element, Clean The Oil Lines And The Remote Filter Base; Turn The Engine Until The Oil Gauge Shows Pressure Before Starting A Rebuilt Engine {1307,1318}

1980/10/13 Understand The Effects Of Extended Oil And Filter Change Intervals{0375}

1980/10/20 New Basic Oil Pump Groups Use Hardened Gears For Longer Service Life{1304}

1980/10/20 List Of Correct Fuel Injection Nozzle Assemblies To Use For Different Engine Applications{1254}

1980/10/20 Pressure Relief Fitting Added To Fan Drive Hub For More Positive Lubrication Of Front Bearing{1359}

1980/10/20 Crankshaft Now Has A Fillet Radius At Front Main Bearing Journal{1202}

1980/10/20 Before You Use Any Service Publication, Make Sure It's Current{0374}

1980/10/27 A Group Of Special Instructions On The Subject Of Alignment Is Currently Available{0374,1000}

1980/10/27 5P9733 Adapter Group Is Available To Test Hydramechanical Shut-Off Groups{7418,7403,7407,7410}

1980/10/27 Take A Little Time: Check The "Supplements" Section Regularly For Important Information About Existing Publications{0374}

1980/11/03 Kysor Air-Operated Shutdown Actuators For 3406, 3408, 1693 Truck Engines{7400,1265}

1980/11/03 Modification Of Puller Bolt Prevents Thread Damage During Removal Of Sleeve From Sleeve Metering Fuel System{0621,1251,1253}

1980/11/03 Check Valve Added To Hydramechanical Shut-Off{7418,1286,1307}