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Upgrade & Restore Your Wheel Balancer's Shaft Assembly

The Retainer Washer, 1".5" Id is a hardened, precision flat or spacer washer designed to support heavy axial rotational loads and prevent friction binding on the main threaded shaft and mounting hubs of professional wheel balancers.

Regular maintenance and timely replacement of worn washers are critical to preventing hub-nut binding on main spindle shafts and keeping wheel mounting assemblies rotating perfectly true.

đź“‹ Factory Service Bulletin Guidance:

Update Date: September 2009
Subject: APX - Bead Loosener Pivot Pin Retainer Removal

We are no longer using the P/N 8109945 Retainer Washers on the P/N 8185634 B.L. Cylinder Rod Pivot Pin. This allows the pin to “float” up and down with the rod and eliminates a small amount of stress on the rod. We already implemented this running change on other rim clamp models. When we ship the APX, the pin is held in place with a large tie wrap. In the course of normal service, if you encounter APX units in the field that have these retainer washers on the pin, remove and discard both the top and bottom retainer washers. Tie Wrap for Shipping Remove & discard top & bottom washers

Machine Location:

This washer is positioned on the main threaded shaft, backing plate assembly, hub nut retainer, or motor mounting plate of the wheel balancer.

Key Features & Specifications

  • Hardened Wear Resistance: Stamped from high-strength carbon steel to withstand extreme high-speed rotational loads without crushing.
  • Precision concentric alignment: Sized with exact inner and outer diameters to eliminate radial wobble on rotating balancer shafts.
  • Corrosion Barrier: Treated surface resists garage humidity, moisture, and shop chemicals.

Complete Machine Compatibility

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

  • Coats 1100 Series Balancer
  • Coats 1250 Series Balancer
  • Coats 1300, 1400, 1500 And 1600 Wheel Balancer
  • Coats 6450 3D
  • Coats 700 , 700 Solid State
  • Coats 850 Ss Wheel Balancer
  • Coats 85613512 E900
  • Coats 85613776 E900
  • Coats Ibs 2000 Wheel Balancer
  • Coats Series Xr 1750, 1750-2D, 1750-3D, 1750-3Di Wheel Balancer
  • Coats Series Xr 1800, 1850 Wheel Balancer
  • Coats Vero Series Wheel Balancer

Frequently Bought Together / Related Parts

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

đź”§ Pro Installer Tip:

Run a wire brush over the balancer shaft to remove any surface rust or tire lube before sliding the washer on. Apply a micro-thin layer of high-temperature grease on both washer faces.


Alternative / Cross-Reference Part Numbers: SVI BW-1699-45 | Coats 8109945 | Distributor AM8109945

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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