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Upgrade & Restore Your Tire Changer's Mechanical Rigidity

The Proguard Positioning Pin Extension / Anti Rotation Pin, Medium is a high-tensile structural fastener designed to clamp and secure cylinder plates, tower bases, and mechanical brackets on professional tire changers.

Worn, stretched, or cross-threaded bolts cannot hold the proper clamping force, which leads to mechanical shift and misalignment. Replacing them restores rigid mechanical alignment.

๐Ÿ“‹ Factory Service Bulletin Guidance:

Update Date: May 2013
Subject: ProGuard โ€“ Positioning Pin Extensions

There are currently three different positioning pin extensions for the ProGuard. The standard equipment long silver pin shipped with the machine, 0.450โ€ in shaft diameter, is P/N 83031335. The optional medium length silver pin is P/N 83032133. The optional long black pin, 0.550โ€ in shaft diameter, is P/N 85607767. The long black pin is stronger than the long silver pin and is less prone to damage during use. (There may be a few wheels with stud-holes too small to fit the black pin.) P/N 83031335 0.450โ€ diameter P/N 83032133 Medium length P/N 85607767 0.550โ€ diameter More durable

Machine Location:

This fastener is used in the cylinder mounting plates, vertical towers, or bead breaker arm pivot structures.

Key Features & Specifications

  • High-Tensile Strength: Grade 5 or Grade 8 carbon steel construction built for heavy shear and tensile stress.
  • Zinc Plating: Corrosion-resistant zinc finish defends against shop dirt, oils, and moisture.
  • Rolled Precision Threads: Rolled threads provide maximum engagement and hold clamping tension.

Complete Machine Compatibility

This universal replacement part is documented and verified to fit the following Coatsยฎ equipment models:

  • Coats 80C 90C Center Clamp Tire Changer (Revision 2)
  • Coats Aps-3000 Leverless Tire Changer 1
  • Coats Proguard Leverless Plus, Tire Changer

Frequently Bought Together / Related Parts

These drawing-adjacent parts connect directly next to this part on your parts breakdown and assembly drawings:

๐Ÿ”ง Pro Installer Tip:

Before installing, run a tap through the mating threads to clean out old thread locker, dirt, or metal shavings. Tighten to factory-recommended torque settings.


Alternative / Cross-Reference Part Numbers: SVI BW-8303-2133 | Coats 83032133 | Distributor AM83032133

AMMCO and COATS are registered trademarks of The Coats Company. AEPN Inc. is not associated in any way with The Coats Company, Inc. Any names, symbols, numbers, and descriptions are used for reference purposes only. It is not implied that any part listed is the product of these manufacturers.

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