1995/08/21 Caterpillar

New Service Repair Camshaft Idler Gear Shaft Available For Use With Cylinder Blocks With Damaged Pilot Bore{1206,1212,1237}

Usage:

Caterpillar Machines Powered By 3406 (11N, 70V) Machine Engines

Reference: Service Magazine; March 7, 1994; Page 14; "Be Sure To Use Correct Camshaft Idler Gear Shaft And Bolts".

A new 7C-6697 Service Repair Camshaft Idler Gear Shaft is available as a repair option for cylinder blocks with damaged pilot bores. The service repair shaft has a longer [11.0 mm (.43 in) versus 8.42 mm (.331 in)] shaft pilot. If the original 4N-0345, 7C-6357, or 6I-0093 Camshaft Idler Gear Shaft elongates or distorts the pilot bore, the longer pilot length of the service repair shaft should engage the undamaged portion of the pilot bore. This should allow repair of a damaged cylinder block without replacing the complete cylinder block in most cases.

NOTE: A service repair camshaft idler gear shaft should ONLY be used when the pilot bore in the cylinder block is damaged enough that the original shaft cannot be used.

Caterpillar Information System:

1995/08/21 Recommendations For Inspection And Replacement Of Rubber and Viscous Crankshaft Dampers{1205}

1995/08/21 Improved Level Switch Available{7422}

1995/08/21 Driveshaft Dust Cups Now Serviceable{3253}

1995/08/21 Low Friction Wear Ring Is Available For The Front Suspension Cylinders To Help Reduce Vibration{7201}

1995/08/14 Remanufactured 3500 Engine Core Return Requirements{1000}

1995/08/14 Piston Usage Chart For Two Piece Pistons{1214}

1995/08/14 New Piston Crown Assembly Used In Piston And Rod Group{1214}

1995/08/14 Wear Sleeve Removal Tooling May "Mark" The Crankshaft{1202,1161}

1995/08/14 New Exhaust Manifold Group Helps Prevent Exhaust Manifold Cracking{1059}

1995/08/14 New Indicator For Hydraulic Charge Filter Prevents Leakage{5068}

1995/08/14 Parts Service Information For Articulated Trucks Equipped With Wide Gears In The Final Drive And A Spacer Between The Wheel Assembly And Planetary Carrier{4055,4051}

1995/08/14 New Components In Water Lines Groups And Aftercooler Group Allow Field Installation Of Variable Speed Fan Clutch Vital Information Management System (VIMS){1380,1063,1359}

1995/08/28 New Cylinder Head Group Includes Stronger Cylinder Head{1100,1101}

1995/08/28 New Steering Accumulator Charging Valve Group Is Being Used To Improve Service Life{4307}

1995/08/28 Special Instruction SEHS9879 Available For Installing An Air Cooling Coil For The Air Dryer On Articulated Trucks {4285}

1995/08/28 Adding Vibratory Lock Out Function In Vibratory System{1435,3220,5653}

1995/08/28 Modifying Former Exhaust Manifold Sections To Help Prevent Loosening Or Breakage Of The Exhaust Manifold Retaining Bolts{1059}

1995/08/28 New Thicker Exhaust Manifold Gasket Used{1059}

1995/08/28 New And Reconditioned Valve Projection Specifications{1105}

1995/09/04 New High Pressured Turbocharger Groups Reduce Exhaust Leaks{1052,1053}

1995/09/04 New Flexible Hose Assemblies Used In Turbocharger Oil Lines Group{1052,1307}

1995/09/04 Exhaust Manifold Crossovers Changed To Improve Serviceability And Maintain Balanced Engine Exhaust{1059}

1995/09/04 5P-8665 Liner Puller Group Changed To Accommodate Cylinder Liner With Larger Diameter Top Flange{1216}

1995/09/11 Ground Body Bolts And Locknuts Improve Retention Of The Aluminum Gear In The Circle Drive Groups {5207}