1996/10/07 Caterpillar

New Hoist Rotary Switch Assembly Used To Increase Reliability {1400}

Usage:

D250E (5TN),
D300E (7FN) Articulated Trucks

Description of Change: A new hoist switch assembly is now used. The new switch assembly has internal improvements for increased reliability.

Adaptable To: The new 134-9570 Rotary Switch Assembly is a direct replacement for the former 127-4984 Rotary Switch Assembly. The new rotary switch assembly is effective with D250E (5TN776) and D300E (7FN424) Articulated Trucks and is adaptable all earlier machines. The former switch assembly will no longer be serviced.

NOTE: The new 134-9570 Rotary Switch Assembly also replaces the 118-0640 Rotary Switch Assembly which was used on some early builds of the D250E and D300E Articulated Trucks. The 118-0640 Rotary Switch Assembly was replaced by the former 127-4984 Rotary Switch Assembly.

Caterpillar Information System:

1996/10/07 New Temperature Sensors Used To Monitor Oil Temperature In The Differential Housing {7601,3067}

1996/10/07 New Boot For Pilot Valve Group Improves Lever Movement For Hoist Control {5059,5136}

1996/10/07 New Material Used In Front Wheels To Increase Service Life {4201,4200,4208}

1996/10/07 Service Manual Module Revisions Available {0374}

1996/09/30 Improved Water Pump Groups Available{1361}

1996/09/30 New Governor Weight And Race Increase Durability{1264}

1996/09/30 An Improved O-Ring Seal And Proper Use Of Adapter Locks Reduces Oil Leaks{1252}

1996/09/30 Improved Sleeve Metering Fuel System (SMFS) 8.5 mm (.34 in) Fuel Pump Plunger Eliminates Plunger And Sleeve Scuffing{1251}

1996/09/30 New Margin Spring In Pressure Compensator Valve Provides Stable Pressure Setting For Implement Pump Groups{5070,5055,5086}

1996/09/30 Original 8R-1284 Lining Kit and 8R-1286 Shoe Assembly Is Recommeded When Servicing Articulated Truck Brakes{4253,4254}

1996/09/30 Window Slider Kit Is Now Available To Update Cab Window In The Right Hand Door Group{7310,7308}

1996/09/30 Shims Now Used In Front Suspension Groups To Increase Upper Suspension Cylinder Bearing Life{7201}

1996/10/07 Special Instruction SEHS9983 Available For Installation And Adjustment Of Truck Body {7258}

1996/10/07 New Fuse Cap Available {1417}

1996/10/07 Effectivity Of Upgrades To Remanufactured Transmissions, Torque Converters And Wheel Assemblies {3001,4051}

1996/10/07 Parts Manuals May List Air Conditioning Compressors Incorrectly {1802,1809,7320}

1996/10/14 Improved Alternator Adjustment Strap And Retention Hardware Used To Maintain Belt Tension {1405}

1996/10/14 New Poppet Valve Group Used In Lines Relief Valve Groups To Prevent Excessive Implement Drift {5117}

1996/10/14 Quieter Operating Check Valve Used In Tank Return Line {5067,5129}

1996/10/14 New Splined Boom Foot Pins Used For Improved Lubrication {6504}

1996/10/14 Stronger Baffle Tube Assembly For Hydraulic And Transmission Tank {5056}

1996/10/14 New Seals Available In Seal Kit For Steering Pump Groups And Hoist Pump Group To Improve Service Life {5073,5083,4306}

1996/10/14 Guide Assemblies From Body Mounting Group Are No Longer Necessary On The Truck Rails To Reduce Stresses In The Frame {7258}

1996/10/14 New Instrument Panel Lamps Used To Prevent Film Damage {7451}