SWITCH AS-ROCKER 1690586 - Caterpillar

Challenger 65, 65B (7YC);
Challenger 65C, 65D (2ZJ);
Challenger 65E (6GS);
Challenger 70C (2YL);
Challenger 75 (4CJ);
Challenger 75C (4KK);
Challenger 75D (5AR);
Challenger 75E (6HS);
Challenger 85C (9TK);
Challenger 85D (4GR);
Challenger 85E (6JS);
Challenger 95E (6KS) Agricultural Tractors;
MT116 (3YL);
MP73 (3YL);
MT73 (8KL);
MP116 (9HL);
MP128 (8ZL) Mobil-Trac SystemsIntroduction
This instruction provides the necessary information for the removal of damaged axles from all Large Tillage Tractor minor bogie axle assemblies and the use of the 4C-8701 and 151-1273 Axle Installation Fixture Groups to install a new axle.
Illustration 1. Large Tillage Tractors
Challenger 65, Challenger 65B, Challenger 65C, Challenger 65D, Challenger 65E, Challenger 70C, Challenger 75, Challenger 75C, Challenger 75D, Challenger 75E, Challenger 85C, Challenger 85D, Challenger 85E, and Challenger 95E Agricultural Tractors. In this Special Instruction the term "large tillage tractor" refers to Challenger 65, Challenger 65B, Challenger 65C, Challenger 65D, Challenger 65E, Challenger 70C, Challenger 75, Challenger 75C, Challenger 75D, Challenger 75E, Challenger 85C, Challenger 85D, Challenger 85E, and Challenger 95E Agricultural Tractors.The 4C-8701 Axle Installation Fixture Group accommodates the 3W-5775 Axle and 3W-5776 Seal Retainer, and the 8R-8780 Axle and 8R-9006 Seal Retainer on the 8R-9002 Axle Assembly. The 151-1273 Axle Installation Fixture Group accommodates the 8R-8780 Axle and 8R-9006 Seal Retainer on the 100-3153 Axle Assembly.Do not perform any procedure, outlined in this publication, or order any parts until you read and understand the information contained within.Reference: Service Manual SENR3335, Service Manual SENR5263, Service Manual SENR9439, Service Manual SENR4973. In addition to Large Tillage Tractors, the axle installation fixture groups will accommodate several mobile trac system (MTS) configurations.Use the following chart to determine which axle installation fixture group accommodates Large Tillage Tractors and MTS configurations. Axle Installation Fixture Group
Illustration 2.
4C-8701 axle installation fixture group shown, 151-1273 axle installation fixture group is similar.The Axle Installation Fixture Group is required to accurately install the axle into the axle support.The distance from the end of the axle to the axle support is critical.The components for the 4C-8701 Axle Installation Fixture Group are: The components for the 151-1273 Axle Installation Fixture Group are: Nomenclature
Illustration 3.This instruction refers to various parts of the axle assembly. The name used for each part is:8. Support9. Seal Retainer10. Axle11. "Support Boss" - The part of the support that the axle passes through.Removal Of Damaged Axle From Axle Assembly
* Refer to the following Service Manual modules for the procedure to remove the Minor Bogie Axle Assembly from the tractor.
Illustration 4.1. Place axle assembly in shop press as shown.* The shop press should have a minimum capacity of 50 tons.
Illustration 5. Plates (A) must be in contact with the smaller face of the seal retainer (9). Otherwise, the retainer will deflect when force is applied to the axle causing the retainer to bind on the axle.
Illustration 6.2. Use a welding torch with a heating tip to evenly heat support (8) and seal retainers (9) to 232°C (450°F).
Illustration 7.* A 1U-8865 Infrared Thermometer may be used to check the temperature of the parts.
Illustration 8.
Illustration 9.3. When they have reached the specified temperature, press the axle down through support (8) and seal