1995/07/03 Caterpillar

Procedure To Inspect Disc Lining Assemblies For Wear {4273,4251}

Usage:

D20D (9MG),
D250B (5WD),
D250D (6NG),
D250E (5TN),
D300B (4SD),
D300D (5MG) Articulated Trucks

A procedure for checking disc brake lining assembly wear without removing the tire and wheel is now available. The procedure can be used to determine when disc brake lining assembly replacement is necessary.

Use the steps that follow to check the disc brake lining assemblies for wear.

1. Use a suitable method to clean the backside of wheel and brake assembly.

2. Use an inspection mirror and work lamp or flashlight to view the disc brake lining assemblies.

3. Replace the lining assemblies when the friction material is less than 4.0 mm (.16 in) thick.

(1) Lining assembly. (2) Brake disc. (3) Brake caliper. Replace lining assembly when Dimension A is less than 4.0 mm (.16 in).

Caterpillar Information System:

1995/07/03 Water Lines Groups Changed To Eliminate Fan Guard Interference And Unneeded Lines {1380}

1995/07/03 New Pinion And Seal Assembly Replaces The Former Carbon Seal {3280,3254,3250}

1995/07/03 New Oil Cooler Assembly Used In Filter Base And Engine Oil Cooler Group {1378,1306}

1995/07/03 New Construction Prevents Cable Emergence {4198}

1995/06/26 New Lower Front Suspension Cylinder Retaining Pin Gives Longer Service Life{7201}

1995/06/26 Engine Air Cleaner Air Outlet Flange Available For Parts Service{1051}

1995/06/26 New Final Assembly Tightening Procedure For Retainer Plate Bolts In Rear Wheel Groups{4215}

1995/06/26 Components Of 100-8105 Fan Clutch Now Serviceable{1359}

1995/06/26 Special Instruction SEHS9849 Available for Install Of Automatic Retarder Control (ARC) Retrofit For Later Models{3121}

1995/06/26 New Serviceable Ring Expander And Seal Are Available For Service And Parking Brake Groups{4251}

1995/06/26 Recommended Cat Lubricating Grease For Backhoe Loaders{7509,7520}

1995/06/26 124-7628 Bearing Kit Available For Swing Frame Cylinder Bore Rework{6506}

1995/07/03 New Hitch Pins And Retaining Hardware Improve Lubrication Of The Oscillating Hitch Pins {7057,7113}

1995/07/03 Improved Suspension Cylinder Spherical Ball Joint Bearing Gives Longer Service Life {7201}

1995/07/03 New Pump Drive Seal Resists Cracking {3108}

1995/07/03 New Front Gear Group Used To Improve Load Carrying Capability {1206}

1995/07/03 New Idler Gear Assembly Used In Rear Gear Groups {1206}

1995/07/03 New Liner Seat Inserts Allow Engine Cylinder Blocks with Deeper Liner Seat Cracks To Be Salvaged {1201,1217}

1995/07/03 Interface Seal Available For 70 Pin Connector Between Electronic Unit Injector (EUI) Wiring Harness And Electronic Control Module (ECM) {1408}

1995/07/03 New Exhaust Manifold Has Higher Temperature Capability {1059}

1995/07/03 New Bolts With "Lock-Patch" Used In Front Timing Gear Groups {1206}

1995/07/03 New Electronic Sensor Group (Speed/Timing Sensor) Used {1912}

1995/07/03 Flexible Braided Steel Hose Maintenance {1307,1380,1803}

1995/07/10 Longer Bolts And Spacers Used To Retain The Bearing Cage In The Transfer Gear Group{3159}