1986/09/29 Caterpillar

Improved Damper Guard Used{1205}

Usage:

3512 and 3516 Engines Equipped With A 584.2 mm (23.00"
) Damper

Description of Change: An improved 1W4932 Damper Grand Assembly is used on the above engines. There is a cutout in the outer diameter of the improved damper guard assembly. Formerly, there were two wires on the inner side toward the front timing cover. See the illustration. When a 584.2 mm (23.00") diameter damper was used, there was sometimes not enough clearance between the damper and the water pump housing to remove the guard. If the guard could not be removed, the two wires shown in the illustration were removed. The improved 1W4932 Damper Guard Assembly does not have the two wires shown in the illustration. The part number has not changed.

Location of the two wires to be removed from earlier 1W4932 Damper Guard Assemblies.

Caterpillar Information System:

1986/09/29 Use Correct Compression Seal Washer (Gas Seal) On 7000 Series Fuel Injection Nozzles{1254,1250}

1986/09/22 Improved V-Belts For Alternator{1405}

1986/09/22 More Flexible Lockwire Used With Nylon Seals For Sealing Critical Areas{1257,1264}

1986/09/22 Longer Adjusting Screw And Jamnut Available For Use In Valve Rocker Arms{1123,1105}

1986/09/22 Windshield Wiper Motor Cross Reference{7305}

1986/09/22 Time Requirement Guides (TRG) Available{0370,0374}

1986/09/22 Benefits Of Using The Caterpillar Inc. Product Information System{0330,0350,0373}

1986/09/08 Bearing Failures On Engines Due To Lack Of Lubrication{1230,1219,1203,1202}

1986/09/08 Indications Of Engine Overspeeding When Only One Cam Lobe/Lifter Has Failed{1000,1100,1200}

1986/09/08 Product Support Literature For Military Machines{7567}

1986/09/01 Heavy-Duty Line Of Batteries Available To U.S. Dealers{1400,1401}

1986/09/01 New 9W6370 Electronic Speed Switch Adapter Cable Available For Use With 8T5200 Signal Generator/Counter Group{0600}

1986/10/13 New Service Tools Available{0600}

1986/10/13 New Piston Oil Ring Gives Better Oil Control{1215}

1986/10/13 Water Level Switch Improved{1354,1350}

1986/10/13 Remanufactured Final Drive Hubs And Housings (U.S. And Canada){4000,4002,4054}

1986/10/20 New Oil Pump Relief Valve Guide{1304}

1986/10/20 Orifice Screen Assembly Now Used For The Timing Advance Mechanism{1251,1272,1288,1292}

1986/10/20 Caterpillar Crankshaft Heat Code Locations{1202}

1986/10/20 Check Connecting Rods After Engine Failures Involving Hydraulic Lock{1218,1225}

1986/10/27 Check Oil Drain Hole In OR2671 Or OR2621 Remanufactured Cylinder Heads If Head Used With Breather{1100,1300,1317}

1986/10/27 Stronger Oil Level Guide Used{1326,1300}

1986/10/27 New Indicator Instrument Group Available To Measure Crankcase Blowby And Radiator Air Velocity{0781,1200,1350}

1986/11/03 Custom Product Microfiche Library Is Now Part Of U.S. Product Parts Book Library {0374}