1977/08/29 Caterpillar

Length Of Rod In Steering Brake Group Must Be A Specific Dimension{4100,4111}

Usage:

D3 Tractors and 931 Loaders

To adjust the steering brake on the above machines, use only the procedure shown in the Specifications section of the Service Manuals for D3 Tractors and 931 Loaders. The correct adjustment procedure is very important to brake operation. Follow the adjustment procedure in the sequence shown. Do not adjust components other than those talked about. If this is not done, the result can be problems with the steering brake.

Length of rod important to brake operation.

For example, the earlier 1K7854 Rod and later 1M1959 Rod (see the Illustration) have a specific length that must not be changed. When these machines are sent from the factory, the rod is at its correct length. This dimension is very important to correct brake operation.

During an adjustment of the steering brake, check the length of the rod as shown in the illustration. If the dimension is not 13.0" (333.0 mm), adjust the rod until this length is correct. Then make the brake adjustment.

Make a note of this specification in the Service Manuals for these machines.

Caterpillar Information System:

1977/08/29 Anti-Corrosion And Break-In Coatings{0374,3256}

1977/08/29 Engine Valve Springs Are Now Made Of Stronger Steel{1108}

1977/08/29 Seal Driver Assemblies For Installation Of Equalizer Bar Seals Now Available Through Parts Department{0620,7206}

1977/08/29 New Tube Assemblies For Turbocharger Oil Lines; New Base Assemblies For Oil Filters{1052,1306,1307}

1977/08/29 New Magnetic Switch Has A Coating (Thin Layer) Of Vinyl To Keep Moisture (Water) Out Of Switch{1400}

1977/08/29 Operation Of Control Levers Improved; Modification Made To Boot And ROPS Cab{5063,7325}

1977/08/29 Changes Made To Permit Removal Of Right Steering Clutch Without Need To Drain The Hydraulic Tank{5057,7321,7253}

1977/08/29 Improved Cylinder Block With Spacer Plates Used With Improved Cylinder Heads And Cylinder Head Gaskets{1101,1201,1221}

1977/08/29 Correct Procedure To Change Angle Of 6A Angling Bulldozer Blade{6052}

1977/08/29 Improved Overflow Guard Group For Scraper{6203,7161}

1977/08/29 Sidewall Protectors Available For Beadless Tires{4204,4211}

1977/08/22 Installation Of Generator Sets On Rigid Bases{4450}

1977/08/29 More Bolts Hold Flywheel Housing Group{1157,1162}

1977/09/05 General Application Axle Installer Used On Many Different Caterpillar-Built Machines{0622}

1977/09/05 Installation Procedure For Crankshaft Wear Sleeves Changed{1202,1160,1161}

1977/09/05 Check For Extra Holes In Crankshaft Flange If Oil Leaks From Between The Flywheel And Crankshaft Flange{1156,1202}

1977/09/05 Remove The Paint From The Seal Counterbore On Track Links For Sealed And Lubricated Track{4169}

1977/09/05 New Control Valve Group Gives Pressure Modulation For Smoother Application Of Brakes{4102}

1977/09/05 Field Repair Of Cooler Cores Made Of Aluminium{1063,1374,1375}

1977/09/05 New Spring Used In Valve Group For Transmission Pressure Control{3152}

1977/09/05 Reinforcement Of Bowl Sides Near Spreader Tube{6215}

1977/09/12 Correct Adjustment Of The Transmission Shift Cylinder Linkage Is Necessary{3156,3163}

1977/09/12 Installation Of Magnets And Adjustment Of Switches For Bucket Positioner And Lift Kickout{5109,5112}

1977/09/12 The Discrepancy Card Has Changed{0374}