1979/04/16 Caterpillar

New Flywheel Clutch Uses Three Driven Discs Instead Of Two; Must Be Used Only With New Flywheel{3052,3054,1156}

Usage:

D6C, D6D Tractors (Special Application-Direct Drive)

Description of Change: A new flywheel clutch group and a new flywheel assembly are used on D6D Special Application Direct Drive Tractors. The new flywheel clutch has three driven discs instead of the two discs formerly used. The use of three discs increases the capacity of the clutch to lower the rate of wear in heavy load conditions, and gives longer service life. The reduction in wear will also lower the frequency of adjustment. With the new clutch, a new flywheel group uses a new flywheel assembly to fit the new clutch. The flywheel retainer bolts are not changed.

Show/hide table

Do not make any modification of the former flywheel to adapt it to the new clutch. This type of modification will make the flywheel weaker, and can possibly cause a failure.

Adaptable To: All earlier D6C and D6D Special Application, Direct Drive Tractors (5X and 17R) when the necessary parts are used together. The new flywheel assembly must be used with the new clutch parts.

Caterpillar Information System:

1979/04/16 90° Elbows On Quick Disconnect Couplers Make Installation Easier{0690}

1979/04/16 Longer Self-Locking Bolts Now Used To Hold The Parking Brake Group To The Bearing Retainer{3161,3275,4267}

1979/04/16 How To Extend The Service Life Of 1P5550 Fuel Cam Locking Tool Assembly{0654,1250}

1979/04/16 Hydraulic Accumulator Now Used In Lines Group For Draft Frame{5077,5057,5314,5055}

1979/04/16 Clean The Orifice In The Pressure Control Group During A Transmission Overhaul{3167}

1979/04/16 Testing And Adjusting Procedure For 5P4210 Modular Cab Tilting Cylinder And Valve{0620}

1979/04/09 New Fan Motors Used In Cab Pressurizers{7311}

1979/04/09 Separate Scraper Batteries And Electronic Transmission Controls Now Used{1400,3168}

1979/04/09 New Exhaust Valve Has Improved Three-Piece Construction{1105}

1979/04/09 Improved Engine Design Uses Cylinder Block With Spacer Plate{1000}

1979/04/09 New Brake Actuators And Improved Air System Give Better Brake Operation{4250}

1979/04/09 Serial Numbers Used Instead Of Test Numbers On Power Shift Transmissions{3150,7557}

1979/04/16 Different Type Brake Lining In Steering Brake Group; Higher Oil Level Used With New Lining{4110,3004}

1979/04/23 Two Bolts Have Been Added At The Junction Of The Converter And Retarder Housing To Prevent O-Ring Seal Damage{3109}

1979/04/23 New Retainer Used Between Bolt And Gear In The Torque Converter{3101}

1979/04/23 Dampeners Added To Steering Brake Group To Prevent Noise From Vibration Of Brake Band Assembly{4110}

1979/04/23 Careful, Correct Installation And Maintenance Of Fuel Injection Lines Is Very Important To Prevent Possible Engine Damage, Fire And Other Problems{1252}

1979/04/23 New Oil Cooler Bonnets Used On 3408 And 3412 Engines{1378,1354,1380}

1979/04/23 New Retaining Rings Used In Planetary Groups For Power Shift Transmissions{3176,3150}

1979/04/23 Dowtherm Test Strips No Longer Available{0651,1350}

1979/04/23 Reinforcement Of Draft Frame Gooseneck To Prevent Cracks{6220,6209,6207}

1979/04/23 New Metering Pump In Steering System Has Improved Internal (Inside) Seals{4306}

1979/04/30 The 6B5067 Race And Roller Assembly, Used In Final Drive Group, Can Be Either Of Two Designs{4050,4091}

1979/04/30 New " Drive 6V94 Universal Joint Is Available{0612,1253}