1986/01/13 Caterpillar

New Vee Belt Set Used In Fan Drive Group{1357,1359}

Usage:

3512 Industrial ( 49Y ),
3512 Generator Set ( 24Z ),
3516 Industrial ( 27Z ) And 3516 Generator ( 25Z ) Set Engines

SUPPLEMENT: 02/09/87

SERVICE MAGAZINE, JANUARY 13, 1986, PAGE 18, "NEW VEE BELT SET USED IN FAN DRIVE GROUP." In the Description of Change, it was incorrectly reported that the former Vee belt set was too long. The Vee belt set was actually too SHORT. The models involved are the 3512 Industrial (49Y), 3512 Gen Set (24Z), 3516 Industrial (27Z), and 3516 Gen Set (25Z).

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Description of Change: A Vee belt set is used in the fan drive group used on the above engines. The former Vee belt set was too short.

Adaptable To: The new 8N6720 Vee Belt Set replaces the former 8N6716 Vee Belt Set in the 8N6469 Fan Drive Group used on the above engines. The new 8N6720 Vee Belt Set can be used on earlier engines with the 8N6469 Fan Drive Group.

Caterpillar Information System:

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}

1985/12/16 Pressure Gauge Faces With Tonnage Scales Available For Caterpillar Service Tool Manual And Electric Hydraulic Pumps{0615,0616,0799}

1985/12/16 Bushing Kits Available For Crankshaft Pulleys{1205}

1985/12/16 Improved Clutch Disc And Cooling Oil Flow{3300,3302,3303,3306}

1985/12/16 Crankshaft Seal Usage On 3400 Series Engines{1160,1161}

1985/12/16 Gasket Leakage On Aftermarket Fuel Filters{1261}

1985/12/16 Later 3406B And 3408B Truck Engines Have Higher Minimum Coolant Temperatures{1350,1355}

1985/12/16 Use Care When Handling Turbocharger Compressor Wheels{1052,1077}

1985/12/16 Troubleshooting Of Jacket Water Heaters{1383}

1985/12/09 New, Tougher Gasket Used Between Block And Front Housing{1151,7555}

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

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

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

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

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

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

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

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

1986/01/27 Stronger Cylinder Heads Used{1100}

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}