1994/02/21 Caterpillar

New Suspension Cylinder Rod Seals For Arctic Region Applications {7201,7213}

Usage:

768C (02X),
772B (64W) Tractors;
769C (01X, 1ED),
773B (5SC, 63W) Trucks;
771C (3BJ),
775B (7XJ) Quarry Trucks

SUPPLEMENT: 03/21/94

Service Magazine; February 21, 1994; Page 10, "New Suspension Cylinder Rod Seals For Arctic Region Applications".

Disregard this article. Make note of the article with the same title in this issue.

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

New seals are available for the front and rear suspension cylinders. The new seals have a U-cup shape and are designed to withstand the cold temperatures found in arctic regions, down to -60°C (-76°F). A "ring" of silicone rubber between the lips of the new seals is used as an expansion device to prevent the seals from leaking in cold climates. The seals should be used in all conditions where the machines are expected to operate at temperatures below -20°C (-4°F).

The new 9X-4615 Seal is a direct replacement for the 8T-3539 and 8T-3540 Seals used in the front and rear suspension cylinders.

NOTE: Before installing the seal, lubricate the sealing lips lightly with the lubricant being sealed. Remove both of the former seal rings and position a new seal so that the lips are installed toward the source of the high pressure oil (piston). See the illustrations for the typical locations of the new seals.

Illustration 1. Typical location of the new seal in the front suspension group.

Illustration 2. Typical location of the new seal in the rear suspension group.

Caterpillar Information System:

1994/02/21 Replaceable Sleeve Bearings Can Be Installed In The Circle Assembly And Moldboard Rail Brackets {6154,6157}

1994/02/21 Frame Reinforcement For Challengers With Gel-Filled Front Idlers and Front Counterweights {7050}

1994/02/21 Improved Hydraulic Coupler Has Plated Parts To Resist Corrosion {6129,5057}

1994/02/21 Right Hand Console Reinforcement {5258}

1994/02/21 New Parts Service Friction Disc Available For Machines With Shift Harshness Complaints {3150,3155}

1994/02/14 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}

1994/02/14 New Universal Joint Groups Have Improved Sealing{3251,3253}

1994/02/14 Shorter Stud Used To Improve Sealing Between The Radiator Cap Assembly And Filler Adapter{1382,1353}

1994/02/14 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}

1994/02/14 Publications Available For Off Highway Truck Retrofits{1290,1631,1900,3100,3150}

1994/02/14 Thicker Retaining Ring Is Available For Use With CAT® GraderBit Assemblies{6151,6150}

1994/02/14 Engine Coolant Temperature Gauge May Run High{7400,7453}

1994/02/21 Improved Screen Used In The Brake Oil Cooler {1366,4295}

1994/02/21 Usage of Transmission Hand Controls {3168}

1994/02/21 Direction Of Drum Rotation Can Be Changed; Chain Case Hub Must Be Shimmed Correctly {5634}

1994/02/21 Performance Of Rotor Axle Seal Depends On Correct Shimming Procedure {5634}

1994/02/21 Servicing Lighted Rocker Switches {1435}

1994/02/28 New Shroud Assembly Now Available for Power Take Off {1165}

1994/02/28 Fuel Sump Tank Drain Valve Protection Available {1279}

1994/02/28 Implement Status Switch Harness Modifications {1408,7490}

1994/02/28 New Resistor Provides Higher Intermediate Speed of Air Conditioner Fan {7320,7337}

1994/02/28 6G-2943 Circle Assembly Can Be Reinforced To Improve Service Life In Severe Applications {6154,6157}

1994/02/28 New Guard And Skirting Added To Cutter Box To Protect Tail Pulley And Lower Portion Of First Stage Conveyor {6635}

1994/02/28 Improved Lubrication Of Attachment Coupler Bushing {5133}