1996/12/23 Caterpillar

Improved Seals And Bearings Used To Reduce Seal Leaks In Transfer Gear Groups (6WD){3250}

Usage:

D250D (6NG),
D300D (5MG),
D350D (9RF1-572),
D400D (8TF),
D250E (5TN),
D300E (7FN),
D350E (9LR),
D400E (2YR) Articulated Trucks

Description of Change: New seals and bearings are now being used in the transfer gear groups on 6WD articulated trucks. The new seals and bearings will reduce seal leakage in the 6WD output transfer gear groups.

Adaptable To: The new seals, bearings and related parts, shown in the chart, are in effect with D250E (5TN790), D300E (7FN397), D350E (9LR206), D400E (2YR303) Articulated Trucks.

The new parts, when used together, are a direct replacement for the former parts in D250D (6NG1-Up), D300D (5MG1-Up), D350D (9RF1-Up), D400D (8TF1-Up, 4EJ1-Up), D250E (5TN1-789), D300E (7FN1-396), D350E (9LR1-205), and D400E (2YR1-302) Articulated Trucks.

When installing the new seal, lubricate the seal lip with the lubricant being sealed. Do not use grease to lubricate the seal lip. Also, before the seal is installed, apply a thin coat of 4C-4032 Compound to the outside metal case of the seal.

NOTE: Make sure the seal face is square with the face of the bore and free from damage in the area where the 132-3071 Seal comes in contact with the 132-3072 Seal.

Illustration 1. Parts location for D250D, D300D, D250E, D300E and D350D Articulated Trucks. The transfer gear group for the D250E Articulated Truck is shown.

Illustration 2. Parts location for D400D, D350E, D400E Articulated Trucks.

Caterpillar Information System:

1996/12/23 Orificed Check Valve Removed From Hoist Cylinder Groups For Truck Bed{5102,5486}

1996/12/23 Externally Adjusted Relief Valve Used In Steering Control Valve Group{4307,4322}

1996/12/23 Improved Relief Valve Group For Drive System Reduces Pressure Spikes{5069}

1996/12/16 Tools Used For Transmission Overhaul {3400}

1996/12/16 1U-9069 Limp Home Switch Allows Transmission Control Valve To Be Remotely Operated If Controller Fails {3418}

1996/12/16 Use 1U-9079 PTO Alignment Tool To Aid In Aligning PTO Drive Shaft During Installation {3107}

1996/12/16 Tools Used For Removal And Installation Of Rear Axle Group {3278}

1996/12/16 Use 1U-9100 Adapter Cable To Connect Mid-Size Challenger's On-Board Electronic System To A Personal Computer {7490}

1996/12/16 O-Ring Available For 816328 E.H.P. Block {5125,5126,5059,5461,5466,6406,6460}

1996/12/16 Improved Fuel Sender Assembly Available {7481}

1996/12/16 Exhaust Outlet Tubes Used On Exhaust Heated Truck Body Groups To Keep Exhaust Soot And Condensation Off Rear Lamps {7258}

1996/12/16 Correct Ride Height Settings And Adjusting Procedure Must Be Used {7201,7213}

1996/12/23 Torque/Turn Method Used To Tighten Brake Caliper Retaining Bolts{4256}

1996/12/23 New Temperature Sensors Used Which Prevent False Over Temperature Warnings{1906,1400}

1996/12/23 New Telehandler Brake Pack Adjustment Procedure For Rebuilt Brake Groups{4251,4004,4255,4261}

1996/12/23 New Rotocoil Assembly Used In Engine Cylinder Head Groups{1109}

1996/12/30 Description Of August 1996 (AUG96) Personality Module Changes For 3176B (43Z), 3176C (7ZR), And 3196 (6AR) Engines {1902,1901,1923,7414}

1996/12/30 3054 Engine - New Rear Crankshaft Oil Seal Housing Provides Better Seal {1161}

1996/12/30 Seal Improvement Prevents Leakage In Hook Winch Groups {5417}

1996/12/30 Improved Seals And Bearings Used To Reduce Seal Leaks In Output Transfer Gear Groups {3159,3003}

1996/12/30 New Hydraulic Pump Group Increases Service Life {5070}

1996/12/30 Procedure For Aligning Front Suspension Frame Group With Output Transfer Gearbox {7200}

1996/12/30 Supplement To Operation And Maintenance Manual; "Dual Position Switch To Operate The Tilt Kickout System" {1435,7451}

1996/12/30 Improved Boom Electrical Harness Routing For Increased Reliability {1408}