February 2017 Service ManualSteer Axle ComponentsPart No. 1259369GT S-80 • S-85 • S-80X 13911-1Yoke and Drive HubHow to Remove the Yoke andDrive Hub AssemblyNote: When removing a hose assembly or fitting,the O-ring (if equipped) on the fitting and/or hoseend must be replaced. All connections must betorqued to specification during installation. Refer toSpecifications, Hydraulic Hose and Fitting TorqueSpecifications.1 Remove the pin retaining fasteners from boththe steer cylinder and the tie rod cylinder pivotpins. Remove the pins.2 Tag, disconnect and plug the hydraulic hosesfrom the drive motor. Cap the fittings on thedrive motor.Bodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil tosquirt or spray.3 Loosen the wheel lug nuts. Do not removethem.4 Block the non-steer wheels, and center alifting jack of ample capacity under the steeraxle.5 Raise the machine approximately 6 inches /15 cm and place blocks under the chassis forsupport.6 Remove the lug nuts. Remove the tire andwheel assembly.7 Remove the hydraulic hose clamp retainingfastener from the top of the yoke pivot pin.8 Remove the drive motor mounting fasteners.9 Slide the drive motor shaft out of the drive huband remove the drive motor from the machine.10 Remove the pin retaining fasteners from theupper and lower yoke pivot pins.11 Support and secure the yoke and drive hubassembly to a lifting jack.12 Use a slide hammer to remove the upper yokepivot pin. Use a soft metal drift to drive thelower yoke pivot pin down and out.Crushing hazard. The yoke anddrive hub assembly couldbecome unbalanced and fallwhen the yoke pivot pins areremoved if not properlysupported and secured to thelifting jack.13 Place the yoke and drive hub assembly on aflat surface with the drive hub facing down.14 Remove the drive hub mounting fasteners thatattach the drive hub to the yoke. Remove theyoke from the drive hub. Refer toSpecifications, Machine TorqueSpecifications.Note: Replace the thrust washer when installing theyoke and drive hub assembly onto the axle.
