Stronger Fan Adjustment Bracket Used In Fan Drive Group{1358,1359}
Usage:
3406 Truck Engines ( 92U)
Description of Change: A stronger fan adjustment bracket is now used in the fan drive group on 3406 Truck Engines. The new bracket is made of ductile iron and has more resistance to stresses than the former bracket of cast iron. For this reason, the new bracket will give longer service life.
Adaptable As: The new 9N5120 Bracket is a direct replacement for the former 4N2368 Bracket.
Location of 9N5120 Bracket.
Caterpillar Information System:
1978/11/27 New Coolant Temperature Regulator Has Flat Washer-Type By-Pass Valve{1355}
1978/11/27 New Hose Has More Resistance To Heat{1074}
1978/11/20 A Washer With Closer Tolerances Is Now Used In The Governor And Fuel Pump Drive Group{1288,7462}
1978/11/20 Sender Unit For Engine Oil Pressure Gauge Moved To New Location On Truck Cab{7455}
1978/11/20 Single Coil Shut-Off Solenoid Used In Place Of Dual (Two) Coil Shut-Off Solenoid{1259}
1978/11/13 6V106 Post, 6V107 Stop And 6V108 Cap Now Available For Parts Service Of The 7S1100 Hose Press Arrangement{0660}
1978/11/06 New Control Cover Gives Better Control Of Exhaust Gas Recirculation System{1080,1250}
1978/11/06 Improvement Made To Solenoid In Electric Shut-Off Group{1259}
1978/10/30 6V92 Plug Socket Is Available For The Removal And Installation Of Lubricant Plugs{0612}
1978/10/30 New Fuel Injection Nozzles Are Used In 3208 Truck Engines When Equipped With EGR{1254}
1978/10/23 In The Future There Will Be A Common Warning System For All Caterpillar Machines{7450,7301,7400}
1978/10/23 5P8690 Fixture Group And 5P8691 Socket Are Available For Easier Reconditioning Of 5M4169 Cam Followers{0622}
1978/12/04 Some Force Is Needed To Turn The Drive Shaft In All Tyrone Gear-Type Pumps; New Torque Value For Body Bolts Of Tyrone Gear-Type Pumps{5073}
1978/12/04 New Design Brace Used In 4N2905 Air Cleaner Group{1051}
1978/12/04 New Exhaust Valve Has Improved Three-Piece Construction{1105}
1978/12/04 90° Elbow Added To Air Cleaner Group To Prevent Damage To The Air Filter Service Indicator{1051,7452}
1978/12/11 New Piston Groups Use Keystone-Type Piston Rings And Have Improved Design Of Valve Pockets{1214,1215}
1978/12/11 New Electric Service Meter Used{7480}
1978/12/18 Improved Cylinder Head Gasket Now Used{1101,1201}
1978/12/18 New Switch Assembly Used With Exhaust Gas Recirculation System{1080}
1978/12/18 Longer Bolts Are Now Used To Fasten The Engine Fan Assembly To The Adapter{1356}
1978/12/18 The FT530 Puller Now Can Do The Work Of Three Pullers{0621}
1978/12/18 Caution: Do Not Change Orifice In Water Outlet Of Auxiliary Pump Group{1371}
1988/01/04 Be Sure To Follow Correct Procedure When Checking Transmission Primary Clutch Pressures With Transmission Installed In Machine{3150}