1980/12/01 Caterpillar

Different Water Temperature Regulators Used In Water Lines Groups{1355}

Usage:

D8K ( 66V, 76V, 77V ),
D9H ( 90V ) Tractors;
583K ( 78V ),
594H ( 96V ) Pipelayers

Description of Change: Different water temperature regulators are used in the water lines groups on the above models. The new water temperature regulators open at a temperature of 80°C (175°F). The former regulators opened at a temperature of 74°C (165°F). The temperature at which the regulators open was increased to lower the amount of condensation in the cylinders. When a high sulfur fuel is used, condensation causes acid which increases the rate of wear on piston rings, cylinder liners and valve guides.

Adaptable As: The new 9N2894 Water Temperature Regulator is a direct replacement for the former 9S9160 Water Temperature Regulator. Two regulators are used per machine.

Show/hide table

NOTICE

Do not use regulators with different opening temperatures in an engine. Make sure the two regulators are the same.

Caterpillar Information System:

1980/12/01 New Front Housing Assembly And Gaskets Used{1162,1166,1151}

1980/12/01 Warning: Use Correct Seal On Seat Assembly For Valve Group In Steering Valve Group{4307,4312,4322}

1980/12/01 Check Alignment Of Engine Flywheel And Torque Converter Input Shaft After Flexible Coupling Failures; Also Check Low Idle RPM{3252,1156,3101}

1980/12/01 New Service Handle Kit Permits Cab Door To Be Opened From Inside While Locked (Fastened With Lock){7308,7301}

1980/12/01 Larger Plug Used In The Ends Of The Rocker Arm Shaft Assembly{1102}

1980/12/01 Exhaust Manifold And Air Lines Groups Changed To Prevent Exhaust Leakage And Damage To Manifold Gaskets And Mounting Studs{1059,1061}

1980/12/01 Direct Inquiry Service Information Retrieval System (SIRS) Available To U.S. And Canadian Dealers{0374}

1980/11/24 Replacement Wheel Available For Service Of 6V97 Engine Stand Group{0626}

1980/11/24 New Aftercooler Core Has Copper-Nickel Tubes For Increased Strength{1063,1064}

1980/11/17 Some Remanufactured 3406 Engines Have The Wrong Reference Serial Number On The Identification Plate{7557,1000}

1980/11/17 Use Dust Cap To Prevent Freon Leakage From Air Conditioner; Cap Is Available As Replacement Part{7320}

1980/11/17 New Exhaust Manifold Group And Air Lines Group Used To Prevent Exhaust Leakage{1059,1061}

1980/12/01 Different O-Ring Seal Now Used On The Oil Pump Suction Tube{1307,1304}

1980/12/01 Inspect All Engine Oil And Fuel Filter Elements Before Installation{1000,1261,1318}

1980/12/01 6V4085 Torque Multiplier Group Available{0614}

1980/12/01 Oversize Brake Lining Kit Now Available For Front Wheel Brakes{4254}

1980/12/15 New Bearing Sizes And Identification Codes For AiResearch Remanufactured Turbocharger Cartridges{1053}

1980/12/15 Be Sure To Cut The Center Gasket Even With Top Surface Of Oil Pan Sections To Prevent Oil Leakage{1302}

1980/12/15 Replacement Timing Belts And Variable Belt For Fuel Injection Test Benches Available From Caterpillar{0652,1250}

1980/12/15 Improvements To Selector And Pressure Control Valve Group Give Operator Better Control When Manual Modulation Pedal Is Depressed (Pushed In){3167,3162,3157,3152}

1980/12/22 Tires Are Filled With Nitrogen (N2){4203}

1980/12/22 Exhaust Elbow Support Improved{1059,1061}

1980/12/22 New Oil Pan Gasket Has Silicone Bead For Better Seal{1302}

1980/12/22 Installation Tips For Snow Wing{6150,7051,1356,7155}