1997/03/03 Caterpillar

Improved Bushing O-Ring Seal Available For Injection Pump Groups {1251}

Usage:

D35HP (3FD),
D350E (9LR),
D400 (1MD) Articulated Trucks;
RR-250 (6ED),
RR-250B (3RR) Road Reclaimers;
SS-250 (6DD),
SS-250B (5GR) Soil Stabilizers;
980F (5XJ, 8CJ, 3HK, 4RN, 8JN),
980G (9CM, 2KR, 2SR) Wheel Loaders;
5080 (6XK, 8SL) Front Shovels

Description of Change: An improved O-ring seal replaces the former O-ring seal for the injection pump groups in the above machines powered by 3406B/3406C Engines. The improved O-ring seal has a slightly larger outside diameter which creates a better pilot surface on the bushing chamfer during assembly. The chance of cutting the seal is lessened. The improved O-ring seal is identified by its pink color. The former O-ring seal is blue in color.

Adaptable To: The improved 131-3719 O-Ring Seal replaces the former 9X-7735 O-Ring Seal in the above machines. The improved 131-3719 O-Ring Seal is effective with models equipped with 3406 NSFS (New Scroll Fuel Systems). The former 9X-7735 O-Ring Seal is still available for use in other applications.

Caterpillar Information System:

1997/03/03 New Circuit Breaker Panel Base Improves Reliability {1417}

1997/02/24 Information Needed For VIMS Support {7601}

1997/02/24 Resetting Event Recorder And Service Lamp For VIMS {7601}

1997/02/24 Lubrication Pump Group Container Assembly Now Available As A Serviceable Part {7540,7510}

1997/02/24 Tooling Available To Tighten Cab Mounting Bolts {7301,0602,0765}

1997/02/24 New Larger Steel Retainers Used In Return Line Manifold Increase Service Life {5057}

1997/02/24 Some Service Parts Available For Engine Fuel Injection Pump {1251}

1997/02/17 VIMS-PC Version 2.1 Now Available {7601}

1997/02/17 New Motor Rotating Group Used And New Swing Motor Group Used To Improve Handling {5058}

1997/02/10 Updates To Hydraulic Excavator Engine Due To Underspeed Electronics {1408,1920}

1997/02/10 New Hose Used In Hydraulic Front Lines For Combining Stick Flow Between Control Valves Provides Longer Service Life {5057}

1997/02/10 Hydraulic System Pressure Relief Valve Substitution {5069,5072}

1997/03/03 New Harness Assembly For 3500 Electronic Unit Injector (EUI) Engines And 3500B Engines {1408}

1997/03/03 Installation Of Piston Pin Retainer {1215}

1997/03/10 Technical Information "Bargain List" {0374,0375}

1997/03/10 Correct Identification Of Flexible Coupling Group {3252}

1997/03/10 Identifiers Detect Contaminated Air Conditioning Refrigerant {1800,1802,7320}

1997/03/10 Proper Tensioning Of V-Belt Improves Air-Conditioning Compressor Service Life {1807,7320,1800}

1997/03/17 New Washers Used In Oil To Air Cooler Group To Improve Service Life{1374}

1997/03/17 New Bolts And Washers Used To Retain Track Tensioner Cylinder Rod Seal{4197,4157}

1997/03/17 The Addition Of Washers To The Boom Valve In The Main Hydraulic Control Improves Controllability{5051,5461}

1997/03/17 Bottom Dump Cylinder Has Stronger Cylinder Cap{5457}

1997/03/17 Swing Pump Braking Torque Response May Be Adjusted{5473,5467}

1997/03/17 Procedure To Increase Swing Frame Service Life{6506}