1995/05/08 Caterpillar

New Front And Rear Crankshaft Seal Groups Used{1160,1161}

Usage:

D11N (4HK, 74Z) Track-Type Tractors;
776B (6CJ),
776C (2TK),
784B (5RK) Tractors;
777B (4YC),
777C (4XJ),
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL) Trucks;
994 (9YF) Wheel Loaders;
5130 (7TJ, 5ZL),
5230 (7LL) Excavators

Description of Change: New front and rear crankshaft seal groups are used in the engines in the above machines. The new seal groups are identical to the former seal groups except for the sleeves. New sleeves used in the new seal group have an improved surface finish.

Adaptable To: The new 113-8432 and 113-8433 Crankshaft Seal Groups are direct replacements for the former 6I-3809 and 6I-3810 Crankshaft Seal Groups respectively in the 7W-3813 Crankshaft Seal Group. The former crankshaft seal groups are canceled.

The new 113-8432 Crankshaft Seal is used in the front housing on standard rotation engines and the flywheel housing on reverse rotation engines. The new 113-8433 Crankshaft Seal is used in the flywheel housing on standard rotation engines and the front housing on reverse rotation engines.

Caterpillar Information System:

1995/05/08 New Plugged Filter Indicator Switch Improves Service Life{7450}

1995/05/08 Larger Bolts Provide Improved Bearing Retention For Increased Fan Bearing Life{1359}

1995/05/08 New Valve Cover And Valve Cover Base Assembly Used{1107,1120}

1995/05/08 Selecting The Correct Turbocharger, Wastegate Orifice, And Personality Module For 3500 Engines Used In 793B Trucks{1052,1057,1902}

1995/05/08 Selecting The Correct Turbocharger And Wastegate Orifice For 3500 Engines Used In 793 Trucks{1052,1057}

1995/05/08 Serviceable Parts Available For Water Spray Pumps Used On Asphalt Compactors{5614}

1995/05/08 Brake Release Pump For Towing Is Available{4354}

1995/05/01 Engine Air Filters{1054}

1995/05/01 Use Correct Lubricants With Track Rollers And Idlers{4159,4180,7581}

1995/05/01 Procedure To Tighten Bolts And To Shim Rear Drive Axle Is Available{3278}

1995/05/01 New Turbocharger Support Group Provides Improved Serviceability{1050,1052}

1995/05/01 Undersize Bearing Cone Available For The Axle Housing Outer Wheel Bearing{4215}

1995/05/08 New Electronic Control Group (Engine Coolant Temperature Sensor) Used{1906}

1995/05/08 Corrected Altitude Deration Chart {1923,1902}

1995/05/08 Oil Filler Group Changes{1316}

1995/05/08 New Rod Bearings Have Higher Fatigue Strength{1219}

1995/05/08 Improved Spacer Plate Provides Visual Indication Of Use Of "Wide Flange" Cylinder Liners{1221}

1995/05/08 New Oil Filter Shield And Shield Mounting Screws Used In Oil Filter Base Assemblies{1306}

1995/05/15 Use Only 1R-0749 High Efficiency Fuel Filter Assembly {1254,1261}

1995/05/15 Service Life Of The 3Z-4729 Tube Assembly Can Be Increased By Modifying The Mounting Plate For The Combination Valve Group {5057,5064,5084}

1995/05/15 Ordering The Correct Ballstud When Making Drawbar Group Repairs {6170}

1995/05/15 Two Stick Cylinders Used To Provide Different Cylinder Strokes {5458}

1995/05/15 New Duo Cone Seal Retainer Provides Increased Face Load {4052}

1995/05/15 New Alternator Guard Available {7168}