1997/12/08 Caterpillar

An Improved Seal Package Now Available For Tailgate Cylinders{5107,7271}

Usage:

D250E (5TN),
D300E (7FN),
D350E (9LR),
D400E (2YR) Articulated Trucks

SUPPLEMENT: MAY 25, 1998

Service Magazine SEPD0396, Article 17, Page 20; December 8, 1997; "An Improved Seal Package Now Available For Tailgate Cylinders"; for D250E (5TN), D300E (7FN), D350E (9LR), and D400E (2YR) Articulated Trucks.

Disregard the article listed above and refer to the article in Service Magazine SEPD0418, Article 10, Page 13 to view the changes and their effectivity. The dimensions for D350E and D400E Articulated Trucks have changed.

--------------- END SUPPLEMENT ---------------

A new seal package and end cap is now available. The new seal package and end cap prevent dirt ingress and leaking on tailgate cylinders and increases their service life. The new seal package and end cap is adaptable by replacing the former end cap and seal package with the parts listed in the chart.

Illustration 1.
Improved cylinder group end cap and seal package

NOTE: Apply 4C-4032 Compound to outer surface of the 143-3670 Wiper Seal before assembly. Lubricate other sealing lips lightly with the lubricant being sealed.

Illustration 2.
2U-7197 Mounting and Cylinder Group (A) R 954 ± 2 mm (37.6 ± .1 in).

NOTE: Adjust shim thickness as required to dimensions in Illustration 2 with tailgate fully closed.

Caterpillar Information System:

1997/12/08 New Foot Actuator Switch For Differential Lock Improves Reliability{3270,1435,3258,3264}

1997/12/08 Wiggins Fast Fill Connectors For 793C Off-Highway Trucks{7513}

1997/12/08 New Brake Oil Temperature Sender Used In Some Non VIMS Off-Highway Trucks For Improved Accuracy{7489}

1997/12/08 New U-Cup Seal In Front And Rear Suspension Cylinder Groups Increases Service Life{7201}

1997/12/08 Steering Accumulator Charging Valve Rotated To Improve Serviceability{4304,4300,4307,4331,4332}

1997/12/08 New Custom Product Support Literature Is Available For 789B Trucks Equipped With 1Q-5845 Heated Brake Actuation Lines Group{0374,4257}

1997/12/08 New Custom Product Support Literature Is Available For 785B Trucks Equipped With Oil Cooler Lines Group{0374,1365}

1997/12/08 New Custom Product Support Literature Is Available For 773B And 775B Trucks Equipped With 3Z-6185 Fuel Heater Group{0374,1296}

1997/12/08 New Custom Product Support Literature Is Available For 773B And 775B Trucks Equipped With 3Z-6363 Fuel Heater Group{0374,1296}

1997/12/08 Front Frame Counterweight Weld Procedure{7051,7055,7056}

1997/12/08 Brake Screen Parts Now Serviced Separately{4295}

1997/12/08 Clean Sludge From Tandems Before Adding New Oil {4071,4064}

1997/12/08 New Maintenance Of Wear Pads Improves Service Life{6460}

1997/12/08 New Tow Hitch Available{7111,5133,7116,7555,7562}

1997/12/08 Improved Latch Pin For Telehandler All Weather Cab{7308}

1997/12/08 New Hose Clamp For The Air Inlet Hose Has Improved Durability{1071}

1997/12/08 New Torque Converters Have Improved Output Shaft Bearings{3101,3135,3130}

1997/12/08 Serviceable Transmission Control Switches And New Improved Retention Bolts Are Available For The 123-7406 And 132-3110 Steering Wheel Groups{3171}

1997/12/08 New Metering Pump Group Improves Steering Control{4312}

1997/12/08 Updated Clipping Method Improves Durability Of Fan Motor Inlet Tube Assemblies{5057}

1997/12/08 Lubricant Available For Use On Door Latches{7308}

1997/12/15 Proper Tensioning Of Alternator V-Belt {1807,1800,1357}

1997/12/15 Improved Rear Suspension Cylinder Seal Package Now Available {7201,7213}

1997/12/15 Beaded Wiper Seals For Rear Suspension Cylinders Increase Service Life {7201,7213}