1986/01/27 Caterpillar

Stronger Cylinder Heads Used{1100}

Usage:

Uprated 3500 Series Engines

Description of Change: Stronger cylinder heads are being used on uprated 3500 Series Engines. These heads have additional casting material.

Adaptable To: The new cylinder heads are adaptable to all earlier 3500 Series Engines, and will be furnished for parts service regardless of the power rating. The new connector for the inlet fuel line must be used because the inlet hole is smaller in the new cylinder heads.

The new inlet connector does not have an internal filter screen. Make sure the fuel injector used with the new head has screens. The injectors on earlier engines do not contain screens because the fuel line connectors on these engines contained a screen. All injectors available through parts service and all Remanufactured Injectors now contain screens.

Use Special Instruction SMHS7536 when installing the parts service cylinder head.

Caterpillar Information System:

1986/01/27 Uprated 3500 Series Engines Now Available{1000}

1986/01/20 Oil Total Base Number (TBN) Test Kit Available{1300}

1986/01/20 Padlock Covers Keep Out Debris{7315,7300}

1986/01/13 Checking Or Adjusting Valve Clearances{1105,1208,1123}

1986/01/13 New Hose Used In Attachment Air Cleaner Group{1051}

1986/01/13 Put Grease On Front Crankshaft Seal Before Installing The Crankshaft Pulley And Damper{1160}

1986/01/13 Lubricate Clamp When Installing Unit Injector Assemblies{1290}

1986/01/13 Round Air Cleaner Inlet Adapter Available{1051}

1986/01/13 New Vee Belt Set Used In Fan Drive Group{1357,1359}

1986/01/13 Bracket Added To The Watercooled Exhaust Manifold Group To Help Support Turbocharger{1059}

1986/01/13 Fuel Sulfur Analyzer Available{0651,1280,1318}

1986/01/13 How To Use Temperature And Pressure Probes With Self-Sealing Probe Adapter Groups{0760,0784}

1986/01/27 Uprated 3500 Series Engines Use Stronger Pistons, New Connecting Rods And New Piston Pins{1214,1218,1225}

1986/01/27 New Service Tools Available{0600}

1986/01/27 Check 5P9729 Track Repair Group For Correct Nuts{0729,0700}

1986/02/03 5N563 Self-Excited SR4 Generators Use Different Type Regulator And A Power Autotransformer{4450}

1986/02/03 Extend Exciter Stator Life In Humid, Salty Environments{4453,4454,4450}

1986/02/03 New Oil Viscosity Recommendations For All 7200 Series Marine Transmissions{3351}

1986/02/03 Time Delay (Relay) Switches Should Be Tested Before They Are Returned For Warranty Claims{7426}

1986/02/03 High Silicates In Antifreeze{1350}

1986/02/03 Special Instructions Packaged With Turbocharger Cartridge Repair Kits May Be Incorrect{1053}

1986/02/03 Service Tools Now Available For Charging Fire Suppression Systems{0647,7401}

1986/02/10 New Cylinder Liner Available{1201}

1986/02/10 Blue Lens Available For Beacon Lamp{7328,7309}