1979/04/16 Caterpillar

Different Type Brake Lining In Steering Brake Group; Higher Oil Level Used With New Lining{4110,3004}

Usage:

955L Loaders

Description of Change: A "molded" type brake lining is now used in the steering brakes on 955L Loaders, and a higher oil level is used with the new lining. Since the new molded lining is not as soft as the former woven lining, the brake pedal will feel more solid and brake action more positive during brake application. Also, the new, harder lining will give longer service life, and the frequency of adjustment will be less. The friction characteristics of the new and former linings are the same.

At the same time, a new oil level gauge is used in the power train oil filler group to increase the amount of oil in the bevel gear compartment. With the new oil level gauge, approximately 13 liters (3.4 gal) of oil must be added to the compartment. This higher oil level is necessary for good brake operation with the new lining.

Adaptable To: All earlier 955L Loaders (13X, 8Y, 57M) when the new parts are used together. The new oil level gauge and higher oil level can be used with either new or former brake lining, but the new lining must not be used with the former oil level gauge.

The new parts are also adaptable to earlier 955 Loaders (85J, 64J, 57J, 71J), but it is possible that operators will not like the brake pedal action on these machines.

Caterpillar Information System:

1979/04/16 New Flywheel Clutch Uses Three Driven Discs Instead Of Two; Must Be Used Only With New Flywheel{3052,3054,1156}

1979/04/16 90° Elbows On Quick Disconnect Couplers Make Installation Easier{0690}

1979/04/16 Longer Self-Locking Bolts Now Used To Hold The Parking Brake Group To The Bearing Retainer{3161,3275,4267}

1979/04/16 How To Extend The Service Life Of 1P5550 Fuel Cam Locking Tool Assembly{0654,1250}

1979/04/16 Hydraulic Accumulator Now Used In Lines Group For Draft Frame{5077,5057,5314,5055}

1979/04/16 Clean The Orifice In The Pressure Control Group During A Transmission Overhaul{3167}

1979/04/16 Testing And Adjusting Procedure For 5P4210 Modular Cab Tilting Cylinder And Valve{0620}

1979/04/09 New Fan Motors Used In Cab Pressurizers{7311}

1979/04/09 Separate Scraper Batteries And Electronic Transmission Controls Now Used{1400,3168}

1979/04/09 New Exhaust Valve Has Improved Three-Piece Construction{1105}

1979/04/09 Improved Engine Design Uses Cylinder Block With Spacer Plate{1000}

1979/04/09 New Brake Actuators And Improved Air System Give Better Brake Operation{4250}

1979/04/23 Two Bolts Have Been Added At The Junction Of The Converter And Retarder Housing To Prevent O-Ring Seal Damage{3109}

1979/04/23 New Retainer Used Between Bolt And Gear In The Torque Converter{3101}

1979/04/23 Dampeners Added To Steering Brake Group To Prevent Noise From Vibration Of Brake Band Assembly{4110}

1979/04/23 Careful, Correct Installation And Maintenance Of Fuel Injection Lines Is Very Important To Prevent Possible Engine Damage, Fire And Other Problems{1252}

1979/04/23 New Oil Cooler Bonnets Used On 3408 And 3412 Engines{1378,1354,1380}

1979/04/23 New Retaining Rings Used In Planetary Groups For Power Shift Transmissions{3176,3150}

1979/04/23 Dowtherm Test Strips No Longer Available{0651,1350}

1979/04/23 Reinforcement Of Draft Frame Gooseneck To Prevent Cracks{6220,6209,6207}

1979/04/23 New Metering Pump In Steering System Has Improved Internal (Inside) Seals{4306}

1979/04/30 The 6B5067 Race And Roller Assembly, Used In Final Drive Group, Can Be Either Of Two Designs{4050,4091}

1979/04/30 New " Drive 6V94 Universal Joint Is Available{0612,1253}

1979/04/30 2P8316 Dowel Now Available For Parts Service{0652}