1994/02/21 Caterpillar

New Parts Service Friction Disc Available For Machines With Shift Harshness Complaints {3150,3155}

Usage:

D4H (8PB, 9DB) Tractors D4H (8ZF) Track Skidders

Shift harshness has occasionally been a complaint in D4H Tractors. The term "shift harshness" as used here means "excessive jerk during a shift that is accomplished within the expected time". The shift harshness level is not considered harmful to the machine, but in some cases it has been objectionable to the owner or operator.

The new 106-3045 Disc (Rayflex friction material) will provide some reduction in shift harshness when installed in the directional clutches (forward and reverse) of problem machines. However, installation of the new disc will have no effect on shift quality problems that are caused by shift hesitation or shift delay.

The new 106-3045 Disc is a direct replacement for the production discs. The new 106-3045 Disc should not be mixed with production discs within the same clutch, however, the new discs may be used in the forward clutch only or the reverse clutch only, if desired. New plates should be installed with the new discs.

Caterpillar Information System:

1994/02/14 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}

1994/02/14 New Universal Joint Groups Have Improved Sealing{3251,3253}

1994/02/14 Shorter Stud Used To Improve Sealing Between The Radiator Cap Assembly And Filler Adapter{1382,1353}

1994/02/14 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}

1994/02/14 Publications Available For Off Highway Truck Retrofits{1290,1631,1900,3100,3150}

1994/02/14 Thicker Retaining Ring Is Available For Use With CAT® GraderBit Assemblies{6151,6150}

1994/02/14 Engine Coolant Temperature Gauge May Run High{7400,7453}

1994/02/14 Air-To-Air Aftercooler Assembly Mounting Brackets Improved{1063}

1994/02/14 Multipurpose Tractor Oil (MTO) Is Usable In All Challenger Implement Hydraulic And Combined Implement And Steering Hydraulic Systems{5068,5050,5450}

1994/02/07 Fuel Injection Pump Improvements{1251}

1994/02/07 Cylinder Head Gaskets Improved To Provide Better Fire Ring Retention{1124}

1994/02/07 New Turbocharger Groups And New Turbocharger Cartridge Groups Have Improved Thrust Bearing And Turbine Ring Seal{1052,1053}

1994/02/21 Right Hand Console Reinforcement {5258}

1994/02/21 Improved Hydraulic Coupler Has Plated Parts To Resist Corrosion {6129,5057}

1994/02/21 Frame Reinforcement For Challengers With Gel-Filled Front Idlers and Front Counterweights {7050}

1994/02/21 Replaceable Sleeve Bearings Can Be Installed In The Circle Assembly And Moldboard Rail Brackets {6154,6157}

1994/02/21 New Suspension Cylinder Rod Seals For Arctic Region Applications {7201,7213}

1994/02/21 Improved Screen Used In The Brake Oil Cooler {1366,4295}

1994/02/21 Usage of Transmission Hand Controls {3168}

1994/02/21 Direction Of Drum Rotation Can Be Changed; Chain Case Hub Must Be Shimmed Correctly {5634}

1994/02/21 Performance Of Rotor Axle Seal Depends On Correct Shimming Procedure {5634}

1994/02/21 Servicing Lighted Rocker Switches {1435}

1994/02/28 New Shroud Assembly Now Available for Power Take Off {1165}

1994/02/28 Fuel Sump Tank Drain Valve Protection Available {1279}