1994/09/26 Caterpillar

New Spring Retainer Used In Main Hydraulic Control Valves{5051}

Usage:

225 (20S, 51U, 76U),
225B (2ZD, 3YD),
225D (6RG, 2SJ),
227 (10W),
229 (1GF, 1AG),
229D (2LJ),
231D (5WJ, 1NK),
235 (32K, 64R, 62X, 81X, 83X),
235B (7WC, 9PC, 1FD, 4ED),
235C (5AF, 2PG, 3WG, 4DG),
235D (8KJ, 8TJ),
245 (94L, 95V, 82X, 84X),
245B (6MF, 1SJ),
245D (7ZJ, 4LK) Excavators

Description of Change: The 9T-1841 Spacer in the main control valve may get twisted and get caught in the centering spring. The 9T-1841 Spacer and 9T-1827 Retainer may be replaced with a new 112-4185 Retainer. The new 112-4185 Retainer is thicker than the former 9T-1827 Retainer. The additional thickness eliminates the need for the separate retainer and spacer. The location for the 112-4185 Retainer is shown in the illustration.

Adaptable To: The affected hydraulic control groups and the respective model applications are listed in the chart.

Typical location of 112-4185 Retainer (1).

Caterpillar Information System:

1994/09/26 Tensioner Group Pin May Be Difficult To Remove{4197}

1994/09/26 Improved Lamp Body Now Available{1429}

1994/09/26 Caterpillar Legendary Service Literature Catalog SELD0811 Updated{0374}

1994/09/19 Caterpillar Introduces New Long Life Heavy Duty Engine Coolant{1395}

1994/09/19 Reinforcement Of Boom Lift Cylinder Bracket{6460}

1994/09/19 New Gasket Material Used To Seal Bearing Housing to Drum And Procedure To Check Flatness Of Drum Head{6605}

1994/09/19 Special Instruction SEHS9567 Is Available For Installing Oil Baffles In The 6WD Transfer Gearbox To Prevent Overheating{3250,3011,3000}

1994/09/12 New Gasket Use In The Water Lines Group {1380}

1994/09/12 Improved Fuel Pump Bonnet Seal Has Better Heat Resistance {1251}

1994/09/12 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance {1251}

1994/09/12 New Fuel Priming Pump Assembly Used In Fuel Priming Pump Group {1258}

1994/09/12 New Spring On Fan Belt Tightener Provides Longer Service Life {1358}

1994/09/26 New Gears Are Available To Reduce Transfer Gear Noise Levels{3159}

1994/09/26 Muffler Group and Exhaust Piping Groups Changed To Provide A New Slip-Fit Muffler{1062,1061}

1994/09/26 Bolts Are Now Used In The Steering Linkage Group/Torque Specification Has Been Raised{4305}

1994/09/26 Maintenance Guidelines For Exhaust Bypass Group{1057}

1994/09/26 New Hitch Seal And Retaining Ring Used In Rear Frame Groups Reduces Hitch Face Wear{7051}

1994/09/26 Engine Maintenance Check Deleted{1100}

1994/09/26 Arc Suppressors Improve Life of Air Conditioner Thermostatic Switch{7337}

1994/09/26 Exhaust Dust Ejector Operation{1055,1068}

1994/09/26 New Gears Reduce Noise And Pipe Plugs Make Installation Easier In Auxiliary Drive Group{1150,1165}

1994/09/26 New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}

1994/10/03 New Flexible Lines Used In Aftercooler Water Lines Group{1380,1063}

1994/10/03 New Flexible Exhaust Assembly Has Longer Service Life{1061}