1979/04/30 Caterpillar

The Service Life Of A Power Shift Transmission Is In Direct Relation To The Maintenance Of Its Lubrication System{3004,3179,3150}

Usage:

The same conditions exist today as when the power shift transmission was first used many years ago. That is, the most important single factor in long service life from a power shift transmission is the use of correct oil and filter change intervals. Through the years, users have become aware of (know) how important the change interval is for the engine crankcase lubricating oil and the engine oil filter. However, some users do not remember how important it is to change the oil and filters in the power shift transmission at regular intervals.

The oil used for cooling and lubrication of a power shift transmission which has a lubrication system common with the steering clutches and brakes, will have material worn from the steering clutches and brakes in addition to material from the gears, bearings and clutches of the transmission. If foreign material in the lubrication system completely fills the oil filter element, the filter bypass valve will open. This will permit the foreign material to return to the lubrication system. Parts which have exact tolerances, such as transmission bearings, seal rings and valve spools, cannot give the service life designed into them if this foreign material is permitted in the lubrication system for an extended period of time.

The exact tolerances of a power shift transmission are equal to that of a diesel engine and the same degree of maintenance is necessary for long service life.

Caterpillar Information System:

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

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

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

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

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

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

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

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

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

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

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

1979/04/30 If Loose Bolts Are A Problem, A Modification Can Be Made To The Plate Used To Hold The Leveling Valve For The Cushion Hitch{5313,7107}

1979/04/30 New Ring Gears Used In Flywheel Assemblies{1158}

1979/04/30 6V98 Socket Available To Remove Or Install Tachometer Drive Dowel In Engine Camshaft On D3 Tractors, 910 and 931 Loaders{0612,1210,7462}

1979/04/30 Seals (Double-Lip Type) Made Of Viton Material Are Now Used In Vickers Pumps Which Have Steel-Backed Bronze Plates Between Rotor And End Plates{5055}

1979/04/30 Improved Gasket Now Used Between The Flywheel Housing And The Cylinder Block{1157,1201}

1979/04/30 New Design Exhaust Gasket Used In Air Lines Group{1061}

1979/04/30 Scraper Starting System Now Separate From Tractor System{1450,1402}

1979/04/30 New Wear Guard For Final Drive Case, With Hardened Flat Washers And Increased Torque To Keep Guard Mounting Bolts Tight{4059}

1979/05/07 Torque Turn Adjustment Of Final Drive Hub Bearings{0654,4050}

1979/05/07 New 6V116 Water Sleeve Removal Tool Is Available{0621,1101}

1979/05/07 Part Numbers Of Bearings To Use For Service Replacement In Fuel Injection Pump Housings For Sleeve Metering Fuel Systems; Correction To Special Instruction For Installation.{1253}

1979/05/07 How To Bleed (Remove) Air From The Hydraulic Control Circuits Of The Winch{5163}