Inspect Camshaft And Lifters After A Failure In The Valve Mechanism Area
Usage:
All 3500 Series Engines
Failures in the valve mechanism area or fuel injection pump area can cause damage to the camshaft or lifters. These failures include broken rocker shafts, rocker arms or rocker shaft bolts, seized injector, broken injector spring, etc. Any time there is a failure in the valve mechanism area or unit injector, the camshaft lobes, lifter roller and the lifter roller pins must be inspected for possible damage. Look for chips on the edges of the lobes and for indications of erosion (spalling) on the lobes and rollers. Also, check to see if the lifter roller pin has moved in its bore.
Example of a lifter pin that has moved.
Caterpillar Information System:
1984/01/18 Drive Block Retainer Plates Are No Longer Used
1984/01/18 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1984/01/18 New Plastic Impeller Will Help Improve Service Life Of Water Pump Seal
1984/01/18 New Spring And Shaft Used In Governor Control Lever Have Increased Corrosion Resistance
1984/01/18 Stronger Water Cooled Exhaust Manifold Used
1984/01/18 Water Pump Housing Is Now Available For Parts Service
1984/01/18 Mixture Of Inch And Metric Fasteners To Be Used
1984/01/18 Usage Of Pistons With Rectangular Rings
1984/01/18 Dry Exhaust Elbow and Improved Turbocharger Exhaust Seal Help Prevent Exhaust Gas Leakage
1984/01/18 Replacement Valve Guides Can Be Used To Recondition Cylinder Heads
1984/01/18 New Cover And Lever Will Prevent Overtravel Of Valve Spool
1984/01/18 FT1808 Cable Permits Easier Use Of 6V2100 Multitach To Check Engine Or Alternator RPM
1984/01/18 Modification Of Control Panel Gives Different Power Source For Overcrank Timer To Prevent Starter Motor Failures
1984/01/18 Parts Service Information For Pistons
1984/01/18 Smaller Dowel, Stronger Cover Used On Oil Pump Drive Shaft
1984/01/18 Cooling System Conditioner Helps Prevent Cavitation Damage
1984/02/22 Correct Wiring And Fuse Must Be Used For Correct Operation Of Shut-Off Solenoid Group
1984/02/22 Correct Oil Pressure Setting For Marine Transmissions
1984/02/22 Fuel System Manual Bleed Valve Removed
1984/02/22 Housing Assembly Now Has Sleeve To Prevent Housing Damage
1984/02/22 New Water Pump Groups Have Improved Impellers And Shafts
1984/02/22 New Cylinder Head Assembly Made With A Different Material
1984/02/22 Remanufactured Cylinder Head Assemblies
1984/02/22 3406B Engines Available