1977/05/09 Caterpillar

Improved Air Cleaner Group{1051}

Usage:

3208 Engines;
1100 and 3100 Series Engines

Description of Change: An improved air cleaner group is now available for the above engines. The new air cleaner has a cover which is held in place by a strap and two rods which fasten to the brackets on the outside of the body. (See illustration.) The former air cleaner had a stud to hold the cover to the body and failure was possible because of vibrations (see illustration). The new air cleaner group also has a different element assembly. In addition, a screen and gasket assembly has been made available for use at the air inlet of either the new air cleaner group or the former one. The screen in the air inlet gasket assembly will not permit foreign material to fall into the air inlet pipe during installation or service to the air cleaner.

New air cleaner group.

Former air cleaner group.

Adaptable As: The new 7N1427 Air Cleaner Group is a direct replacement for the former 3N3212 Air Cleaner Group which is canceled. The new 7N1426 Gasket is a direct replacement for the former 3N2903 Gasket.

Caterpillar Information System:

1977/05/09 Shorter Bolts Now Used In Exhaust Manifold Support{1059}

1977/05/09 New Rotor Assembly For Engine Oil Pump Has A Drilled Passage For Better Lubrication Of Oil Pump Bearing{1304}

1977/05/09 Special Torque Wrenches Use Noise As Indication Of Correct Torque Application{0614}

1977/05/02 Special Tools For Complete Repair Of Water Pump In Direct Injection Engines{0620,1361}

1977/05/02 Improved Keystone Piston Assembly{1214,1216}

1977/05/02 Improved Cylinder Block With Spacer Plate Used With New Cylinder Heads, Cylinder Head Gaskets, Cylinder Liners And Timing Gear Housing{1101,1162,1201,1216}

1977/04/25 New Socket Assembly To Tighten The Bolts That Fasten The Sleeve Levers To The Sleeve Shaft{0621,1250}

1977/04/25 Revision Of Engine Data Sheet Gives Important Information On Single-Bearing Generators Assembled To Cat Engines{1156,4450,0354}

1977/04/25 Improved 5P3000 Engine And Transmission Shipping Stand Assembly; Modification Available For Stands Already In Use{0640}

1977/04/25 New Oversize Connecting Rod Bearings Have Improved Design And Material{1219}

1977/04/25 New Piston Pin Bearing Used In Connecting Rod Assembly{1218}

1977/04/25 Alternator Groups With Slower Drive RPM Used Again{1205,1405}

1977/05/09 New Information On Caterpillar Cooling System Inhibitor{1350}

1977/05/09 New Fuel Nozzle Assembly Available{1254}

1977/05/16 Correct Installation Of Valve Lifters On The Camshaft Is Very Important To Prevent Failures{1209}

1977/05/16 New 5P4185 Fuel Pump Timing Pin To Be Used Only On 3408 And 3412 Engines{0650,1257}

1977/05/16 Stronger Guide Assembly For Oil Level Gauge Used On Caterpillar-Built Engines In Massey-Ferguson Tractors{1300}

1977/05/16 Use Special Instruction Form SEHS6929 For Repair And Maintenance Information On All Roll-Over Protective Structures (ROPS){7323,7325}

1977/05/16 Flare Nut Wrenches Available{0610}

1977/05/23 Parts In 1P3075 Seal Puller Group Available Separately{0621,1160,1161}

1977/05/23 Orifice In Oil Supply Passages Of BrakeSaver Stator Prevent Seal Leakage{1155}

1977/05/23 Install New Plugs To Prevent Oil Leaks At The Oil Filter Base{1306}

1977/05/23 Method Of Piloting Power Generator To Engine Improved{1156,1157,4450}

1977/05/30 New Gasket Used At The Outlet Flange On Heavy-Duty Air Cleaner Group{1051}