1990/11/01 Caterpillar


New Stronger Exhaust Valve Push Rod Used In Valve Mechanism Groups

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:

1990/11/01 New Exhaust Manifold Gasket And Locks Used In Exhaust Manifold Groups
1990/11/01 Modification Of 1U7791 Valve Seat Driver
1990/11/01 Governor Control Motor Polarity May Require A Change
1990/11/01 New Camshaft Has Improved Wear Resistance
1990/11/01 New Bearing Kits Used In Turbocharger Cartridge Groups
1990/11/01 New 4C5084 Oil Filter Cutter Replaces Former 6V7905 Filter Cutter
1990/11/01 New 7X1400 Digital Diagnostic Tool (DDT) Group Available
1990/11/01 Adjustable Exhaust Bypass Group Used; Provides More Precise Ability To Set Exhaust Pressure
1990/10/01 New Oil Filler Group Prevents Oil Loss When Filling With Engine Running
1990/10/01 Increased Tension Applied To Cylinder Head Studs
1990/10/01 New Air Shutoff Groups Prevent Air Leaks And Wear
1990/10/01 Engine Commissioning And Diagnostic Kit
1990/11/01 Setscrew And Nut Available For Fuel Setting And Injector Synchronization
1990/11/01 New Crankshaft Seal Groups Used
1990/11/01 Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability
1990/11/01 New Cylinder Head Gasket And Higher Cylinder Head Bolt Torque
1990/11/01 New Alternator Drive Pulley Seal Used With New Drive Pulley; Poly-Vee Belt Can Be Installed
1990/11/01 New Turbocharger Gas Inlet Housings Used
1990/11/01 Correct Operation And Alignment Of Parts Eliminates 7W3976 Shaft Failures In 50:1 Barring Device
1990/11/01 Additional Serviceable Components in Electric Starter Group
1990/11/01 New Relay Added in the 7C9063 and 7C9064 Instrument Panel Groups For Use With New Digital Pyrometers; Special Instruction SEHS9020 Available
1990/11/01 Planetary Housing Requires Two Ball Plugs
1990/11/01 Correct Procedure To Check For Grounds On Woodward 9905 Series, 2301A Control; Correction For Service Manual Module; 2301A Electric Governors (Load Sharing) For Generator Set And Industrial Engines; Form SENR3585-01
1990/11/01 New 4C6715 Silicone Compound Available For Components Where Centrifugal Force Is Present
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