New Air Start And Override Valve Has Stronger Mounting
Usage:
All 3500 Series Engines So Equipped
Description of Change: A new air start and override valve is now used in the air starting control groups on 3500 Series Engines. The new valve has a larger outside diameter in the area where it attaches to the mounting plate. This larger outside diameter will increase the strength of the valve and increase its service life. The new valve is used in both the air start and override applications.
Also, because of the larger diameters new mounting plates must be used.
Formerly, separate valves were used for the different applications.
Adaptable As: The new parts, when used together, are direct replacements for the former parts. The new and former parts are shown in the chart.
Caterpillar Information System:
1984/06/20 New Bearing Race Is Used On The Auxiliary Drive
1984/06/20 Improved Valve Used In Air Starting Lines Groups
1984/06/20 Borescope And Light Source Available For Internal Inspection Of Passages On Most Caterpillar Products
1984/06/20 New Speed Setting Motor Assembly On Woodward PSG Governor Has More Resistance To Moisture And Vibration Damage
1984/05/16 New Valve Assembly And Seal Used In Fuel Transfer Pump
1984/05/16 New Seal For Fuel Injection Pump Housing Is More Resistant To Heat Damage
1984/05/16 New Recommendation For Oil Hole Location During Installation Of Camshaft Bearings
1984/05/16 Only The External Needle Valve Can Be Adjusted On Woodward EG3P or EG10P Actuators
1984/05/16 New Hoses In Water Lines Group Give Better Performance At Higher Temperatures; New Hose Clamps Also Used
1984/05/16 High Levels Of Soot In The Oil; Make Sure Air Fuel Ratio Control Operates Correctly
1984/05/16 Gasket Changed For Cylinder Block Side Cover
1984/05/16 How To Recognize And Reduce The Effect Of Moisture On SR4 Generator Windings
1984/06/20 Changes Made To Air Shutoff And Rack Shutoff Groups
1984/06/20 List Of Service Publications
1984/06/20 New Pulley Group With Tapered Bearings
1984/06/20 Improved Cylinder Head Gasket
1984/06/20 Different Thread Lubricant Can Be Used On Connecting Rod And Counterweight Bolts
1984/06/20 New Cylinder Head Has Larger Mounting Holes For The Lifting Brackets
1984/06/20 Excessive Oil Consumption: Check The Accuracy Of The Oil Level Gauge
1984/06/20 Remanufactured Oil Pumps Available
1984/07/11 Procedure To Clean Oil Passages In Crankshafts And Cylinder Blocks
1984/07/11 Modification To FT1488 Exciter Tester Group Allows Testing Of All Small Frame SR4 Generators
1984/07/11 List Of Service Publications
1984/07/11 Surface Grinding Of Compacted Graphite Iron Cylinder Heads