Multiquip 43089 Collar Bearing Extender - OEM Replacement Part

The collar bearing extender is a critical spider assembly component that maintains proper spacing and alignment between the trowel arms and spider hub on ride-on trowels. This component works in conjunction with the upper and lower wear plates and thrust collar to ensure smooth, fluid rotation of the blades during concrete finishing operations.

During spider assembly maintenance, the collar bearing extender should be cleaned and examined for concrete buildup, rust, and damage. Wire brush any debris accumulation and replace if damaged. This part is essential when performing spider bolt replacement procedures, which Multiquip recommends after the first 25 hours of operation, then every 100 hours thereafter. Damaged or worn collar bearing extenders can contribute to dished effects on finished concrete, uneven blade pressure, and guard ring instability—all symptoms of improper spider alignment.

Compatible with the following Multiquip trowel models:

• MD105
• MD80
• MD82
• STXDF

Genuine Multiquip OEM part, sold by an authorized dealer.