1997/08/18 Caterpillar

New Clamps And New Hose Now Used for Water Heater Lines To Improve Service Life {1383,1812}

Usage:

D25D (1HK),
D30D (3AJ),
D40D (2JJ),
D350D (9RF),
D400D (8TF),
D250E (5TN),
D300E (7FN),
D350E (9LR),
D400E (2YR) Articulated Trucks

Description of Change: New clamps and water heater hose are now used to reduce leaks.

Adaptable To: The new 9X-2488 Hose Clamp is a direct replacement for the former 8T-0154 Hose Clamp. The new 136-1953 Bulk Hose is solid black with a blue stripe and is a direct replacement for the former 6V-8843 Hose which is solid green. The new hose and clamps are effective with D25D (1HK692), D30D (3AJ421), D250E (5TN1315), D300E (7FN662), D350E (9LR410), and D400E (2YR680) Articulated Trucks. The new bulk hose should be cut to the required length. The new clamp should be tightened to 4.5 ± 0.5 N·m (39.72 ± 4.44 lb in). The new hose and clamps can be used with earlier machines which have the green hose.

Illustration 1. Hoses and Clamps to be Replaced

Caterpillar Information System:

1997/08/18 New Transmission Control Group Improves Operator Comfort {3065}

1997/08/18 Changes To VIMS Truck Payload System {7601}

1997/08/18 New Engine Arrangements For High And Low Altitude Applications {1000}

1997/08/18 Information Is Corrected On The 793C Engine Information Plate {1000,7557}

1997/08/18 Four Wheel Drive All-Wheel-Steer Dead Engine Brake Inspection {4250,4265}

1997/08/18 New Flagpin Retention Method Improves Torsional Strength {7120}

1997/08/18 Improved High Ambient Cooling Configuration Available {1205,1350,1357,1384}

1997/08/18 Improved Three-Point Hitch Rockshaft Seal And Wear Ring Prevents Dirt Packing {7120}

1997/08/11 Improved Switches Now Used To Prevent Open Contacts{1423}

1997/08/11 Supplement To Service Manual, SENR5890, Electronic Transmission Control System{1408,3168}

1997/08/11 Correction To Operation & Maintenance Manual, SEBU6955{0375}

1997/08/11 Improved Type 2 Brake Control Group Components{4258,4257,4262,4269}

1997/08/18 Improved Elbow Design For Draining Oil Filters {1308}

1997/08/18 Implement Control Levers Must Be Centered To Start Machine {5000,5063}

1997/08/18 New Constant Torque Hose Clamps Improve Heating And Air Conditioning System {1808,1812}

1997/08/18 Lubricity Limit Added To Preferred Distillate Fuel Recommendation {1280,7568}

1997/08/18 Use Separate Sampling Pump For Oil and Coolant {7542,7577}

1997/08/18 "Date Updated" Displayed In Parts Manuals On The Service Information System (SIS) {7567}

1997/08/25 Torque Increased For Piston Retaining Nut In Swing Cylinder Groups{5105,7562}

1997/08/25 New Loader Pin For Some B-Series Backhoe Loaders{6118,6119}

1997/08/25 Extended Life Coolant Now Used To Increase Service Life{1352}

1997/08/25 New Duo-Cone Seal Retainers Resist Rotation{4201,7561}

1997/08/25 Revised Service Manual Content Pages Available{0374}

1997/08/25 Correct Procedure For Installing Hydraulically Actuated Electronic Unit Injectors (HEUI){1290}