1990/11/05 Caterpillar


New Stronger Exhaust Valve Push Rod Used In Valve Mechanism Groups{1208}

Usage:


1.1 Liter Family Of Engines

Description of Change: A new stronger push rod assembly is used to actuate the exhaust valves. Formerly, both the intake and exhaust valve push rods were the same. The new push rod assembly has a larger diameter than the push rod it replaces, but a smaller diameter than the fuel injector push rod. The new stronger exhaust valve push rod assembly is used to overcome the higher loads that can sometimes occur with exhaust valves.


Relative sizes of intake (1), exhaust (2), and fuel injector (3) push rods.

Adaptable To: The new 4P4324 Exhaust Valve Push Rod Assembly is a direct replacement for the former 7E4199 Push Rod used to actuate the exhaust valves. The 7E4199 Push Rod continues to be used as the intake valve push rod. If a 7E4199 Push Rod is damaged, in either the intake or exhaust valve actuation application, replace it with the new 4P4324 Push Rod Assembly.

Caterpillar Information System:

1990/11/05 New Exhaust Manifold Gasket And Locks Used In Exhaust Manifold Groups{1059}
1990/11/05 Obsolete Capacitor In VR1 Voltage Regulators{4467}
1990/11/05 New Composite Halogen Headlights And Floodlights Available{1429,1434}
1990/10/29 Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability{1124}
1990/10/29 New Cylinder Head Gasket And Higher Cylinder Head Bolt Torque{1124,1101}
1990/10/29 Modification Of 1U7791 Valve Seat Driver{0782,1103}
1990/10/29 New Bearing Kits Used In Turbocharger Cartridge Groups{1052,7551}
1990/10/29 Governor Control Motor Polarity May Require A Change{1265,1408,7556}
1990/10/29 New Temperature Regulators Prevent Engine Overheating{1355}
1990/10/29 New CE (Caterpillar Environmental) Family Of Metal-Shell Connectors Used{7553}
1990/10/22 New "On Engine" Adjustment Procedure For 3161 Woodward Governor {1264,0782}
1990/10/22 Increased Capacity Oil Sumps Require Additional Oil And Different Maintenance Interval {1302,1318,7524,7525}
1990/11/05 Some Components Of The 7E3580 Engine Adapter Group For Allison AT545, MT543D, And MT653DRD Transmissions Are Not Serviced By Caterpillar{3279,1013,3009}
1990/11/05 Service Manual SENR3479-04 Available For Troubleshooting Engine Test Procedures{1901,1900}
1990/11/05 New Crankshaft Seal Groups Used{1160,1161,1202}
1990/11/12 New 7X1400 Digital Diagnostic Tool (DDT) Group Available {0782,0785,1900}
1990/11/12 Adjustable Exhaust Bypass Group Used; Provides More Precise Ability To Set Exhaust Pressure {1057}
1990/11/12 New Alternator Drive Pulley Seal Used With New Drive Pulley; Poly-Vee Belt Can Be Installed {1425,1357}
1990/11/19 Diagnostic Connector Used To Determine Starter Problems; Starter Monitor Unit Can Be Fabricated{0710,1408,1416,1426,1467,1553}
1990/11/19 New Caterpillar Battery Warranty Statement, SELF5124{1401,7780}
1990/11/19 Correct Procedures For Starting, Stopping And Transporting A Product With A Turbocharged Engine{1052}
1990/11/19 Check Engine Speed Sensor And/Or Crank Angle Sensor (Magnetic Pickups) For Fouling{1912,1900,1907,7529}
1990/11/19 Use Only Stainless Steel Cylinder Liner Shims To Salvage Damaged 4.75" Bore Cylinder Blocks{1201,1216,1217}
1990/11/19 New Roller Camshaft Used{1209,1210}
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