This 10-phase procedure details the safe extraction of pitman arms from Sheppard M-Series steering gears using the ATC6450 puller—ensuring zero damage and maximum efficiency.

Introduction: The Challenge of Vocational Steering Systems

Sheppard M100 steering gearboxes are built for reliability, which often means pitman arms are pressed on with incredible force. The ATC6450 provides the mechanical advantage required to overcome these fits safely.

Phase 1-5: Setup & Tool Engagement

1. Vehicle Stability: Secure the truck and center the steering wheel.
2. Linkage Disconnection: Remove the drag link from the pitman arm.
3. Clean the Sector Shaft: Remove road grime and rust from the exposed threads and arm interface.
4. Position the ATC6450: Slip the puller jaws over the pitman arm, ensuring it is centered on the sector shaft.
5. Lube the Pressure Screw: Apply high-pressure grease to the tool threads for smooth operation and tool longevity.

Phase 6-10: Extraction & Inspection

6. Apply Tension: Hand-tighten the pressure screw until flush against the sector shaft.
7. Impact Extraction: Using a 3/4" impact tool, apply controlled force until the pitman arm breaks free.
8. Inspection: Check the sector shaft splines for any previous wear or twisted teeth.
9. Tool Storage: Clean and oil the ATC6450 before returning to the shop's steering service bay.
10. Ready for Re-install: Clean the splines thoroughly before pressing on the new pitman arm.

Critical Warnings: Avoid These Steering Service Disasters

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