1977/05/13 Caterpillar


Improved Air Cleaner Group

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:

1977/05/13 Guide Assembly For Dipstick (Oil Level Gauge) Now Has Thicker Walls
1977/05/13 New Crankshaft Front Seal And Wear Sleeve Permit Crankshafts With Seal Wear To Be Used Again
1977/05/13 New Information On Caterpillar Cooling System Inhibitor
1977/05/13 New 5P4185 Fuel Pump Timing Pin To Be Used Only On 3408 And 3412 Engines
1977/05/03 New Socket Assembly To Tighten The Bolts That Fasten The Sleeve Levers To The Sleeve Shaft
1977/05/03 Improved Cylinder Block With Spacer Plate Used With New Cylinder Heads, Cylinder Head Gaskets, Cylinder Liners And Timing Gear Housing
1977/05/03 Special Tools For Complete Repair Of Water Pump In Direct Injection Engines
1977/04/22 List Of Service Publications
1977/04/22 Stronger Material Used In Undersize Connecting Rod Bearings
1977/04/22 New Piston Pin Bearing Used In Connecting Rod Assembly
1977/04/22 Tools To Remove Wear Sleeves From Crankshafts
1977/04/22 Improved Mounting For Expansion Tank
1977/05/13 Improved Keystone Piston Assembly
1977/05/13 Gasket For Water Temperature Regulator Now Has Larger Vent Passage
1977/05/13 New Fuel Nozzle Assembly Available
1977/05/25 New Rotor Assembly For Engine Oil Pump Has A Drilled Passage For Better Lubrication Of Oil Pump Bearing
1977/05/25 Shorter Bolts Now Used In Exhaust Manifold Support
1977/05/25 Flare Nut Wrenches Available
1977/05/25 Self Locking Bolts Or Hardened Washers Used In Place Of Sheet Metal Locks
1977/05/25 Orifice In Oil Supply Passages Of BrakeSaver Stator Prevent Seal Leakage
1977/05/25 Correct Installation Of Valve Lifters On The Camshaft Is Very Important To Prevent Failures
1977/05/25 Parts In 1P3075 Seal Puller Group Available Separately
1977/06/08 Improvements To Fuel Injection Pump And Governor
1977/06/22 Water Pump Has Stronger Pulley
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