1978/01/30 Caterpillar

Air Line For Air Compressor Governor Now Connected To Outlet For Wet Air Tank{4272,1065,4278}

Usage:

613B Tractors

SUPPLEMENT: 03/06/78

SERVICE MAGAZINE, JANUARY 30, 1978, PAGE 8. For the article "Air Line For Air Compressor Governor Now Connected To Outlet For Wet Air Tank" use the Illustration that follows to install the new parts on earlier machines.

Installation of air line to wet air tank.

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

Description of Change: The connection for the air line to the air compressor governor is changed from the outlet of the dry air tank to the outlet of the wet air tank. Formerly, in some conditions, it was possible for the air pressure in the wet air tank to be lower than the air pressure in the dry air tank. This can cause the emergency brake to engage with the machine moving and cause the emergency brake to wear rapidly. With the connection on the wet air tank, this problem will be prevented.

Adaptable To: All 613B Tractors when the new parts are used together.

Caterpillar Information System:

1978/01/30 Retaining Ring Of A New Design Now Used In Torque Converter Group{3100}

1978/01/30 Do Not Change Factory Fuel Or Speed Settings On Truck Engines Unless New Settings Are Certified Under Applicable EPA Regulations{0336,0337,1257}

1978/01/30 Breather For Transmission Case Now Made Of Metal{3150}

1978/01/30 New Water Pump Cover Has A Baffle And Wall To Send Coolant Flow From Bypass Line Directly Into Water Pump{1361}

1978/01/30 New Spring Used In Belt Tightener And/Or Fan Drive Groups{1358,1359}

1978/01/30 Oil Strainer (Screen) Added To Turbocharger Thrust Bearing{1052,1053}

1978/01/30 Electric Fuel Pressure Gauge Now Used{7456}

1978/01/30 Rectifiers And Fuses Added To Transmission Control Wiring Increase Switch Service Life{1408,3168,3172,3173,3174}

1978/01/30 Improved Electrical Wiring Has A Separate Fuse For Each Circuit{1408}

1978/01/30 Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}

1978/01/30 Additional Parts Needed To Install 54 Winch On Tractors Equipped With Steel Fuel Lines On The Fuel Tank{5163}

1978/01/23 Stronger Guard Assemblies For Scraper Bowl{6201}

1978/02/06 Silicone Sealant Is Now Used To Keep Water Out Of The Steering Clutch Case{4059,4100,4106,4115}

1978/02/06 Adjustment Of Track Tension On Machines With One Carrier Roller Per Side{4150}

1978/02/06 Add New Measurement And Identification To FT904 Backlash Indicator{0653,3258}

1978/02/06 Stronger Clutch Housing Used In Variable Capacity Torque Converter{3102}

1978/02/06 Successful Engine Service-3208 Engine Booklet Is Available{1000}

1978/02/06 New Water Temperature Regulator Opens At 180°F (82°C){1350,1355,7304}

1978/02/06 Probable Causes Of Low Fuel Delivery During Testing On Fuel Injection Test Benches{0650,1250}

1978/02/13 Replacement Seal Group For Water Pump Impeller Now Has All The Seal Parts Plus An Installation Tool{1361,0622}

1978/02/13 Complete Set Of Contact Points For Dial Indicators Is Now Available In One Group{0653}

1978/02/13 Several Improvements Made To Lines Group In Area Of The Hitch{5057,5077}

1978/02/13 Improvements Made To Push Frame; Instructions To Make Reinforcements On Earlier Push Frames Available{6225}

1978/02/13 Strip Added Under The Hinge For The Front Windshield On ROPS Cabs{7325}