1999/07/12 Caterpillar

New Flow Controls/ Compensators Available {5000,5050,5051}

Usage:

Challenger 35 (8DN, 8RD, ADK),
Challenger 45 (1DR, ABF, 3BK),
Challenger 55 (7DM, 6NN, AEN) Agricultural Tractors

Reference: Special Instruction REHS0456; "Installation of Flow Limiters and Compensator Tubes".

Description of Change: Improved flow controls ("flow limiters") are now available. The new flow limiters now have shaft seals. In addition, the flow limiters allow easier adjustment while the circuit is under pressure. Internally, the flow compensator spool dynamic response in Circuit No. 3 and Circuit No. 4 has been changed to provide better flow stability in speed-critical applications such as fan drive motors, air seeders, and air drills.

Adaptability: The improved flow limiters and flow compensator spools/springs were effective with Challenger 35 (8RD76, ADK330), Challenger 45 (ABF122, 3BK370), and Challenger 55 (6NN172, AEN461) Agricultural Tractors.

For complete installation instructions, refer to the reference special instruction at the beginning of this article.

Caterpillar Information System:

1999/07/12 Stronger PTO Shaft Available {3107}

1999/07/12 Improved Main Fuel Tank Available {1273}

1999/07/12 Snap Ring Improves Rod Wiper Seal Retention {4303,5101,5102,5104,5213}

1999/07/05 New Knob Kit Available For Track Tension Manifold {4197,5051}

1999/07/05 Transmission Maximum Gear is Programmable with Electronic Technician {3168,7610}

1999/07/05 Refrigerant Compressor Group Improvements Increase Belt Life and Reduce Guard Cracking {1802,1807}

1999/07/05 VIMS-PC Version 2.4.2 MST Update Available {7601}

1999/07/05 New Tube Assemblies Used In Torque Converter Lines Group {3101}

1999/07/05 Replacing Propel Pumps On Vibratory Compactors {5070}

1999/07/05 Troubleshooting The Gear Position Sensor On Individual Clutch Modulation Transmissions {3168}

1999/07/05 Incorrect End Float For Limited Slip Differentials {3258}

1999/07/05 New Clutch Discs With Improved Core Material Now Available For Large Off-Highway Trucks {3187,3030}

1999/07/12 Rear Window Latch Improved {7310,7301}

1999/07/12 Implement Pump Changed {5057,5070}

1999/07/12 Supplement To Correct Power Train D&A On Assemble Final Drives {4050}

1999/07/12 Improved Quick Coupler For Backhoe Loaders Provides Better Vertical Digging {6129}

1999/07/12 Proper Cylinder Eye And Rod Eye Diameters Ensure Bearing Retention In Suspension Cylinders {7213}

1999/07/12 Correction To Certain Off-Highway Truck Service Manual Modules {0374,7521}

1999/07/12 New Engine Electronic Control Groups (Personality Modules) Available {1902}

1999/07/12 New Joint For Transmission Oil Cooler Lines {1375,3154}

1999/07/12 New Body Mounted Mud Guard Group Available {4220}

1999/07/12 Stainless Steel Pin Available For Parking Brake Groups {4267}

1999/07/12 A More Durable Alternator Mounting Configuration Is Now Available {1405}

1999/07/12 Oil Carryover Prevention {1317}