HD Switch 2 Kits 784223 Front Caster Fork Pivot Bearing Kit w/Improved UHMW White Bearing Disc for Hustler Super Z XR-7 ATZ FasTrak SD Mini Z Super Mini Z Lawn Mower 344267 263517 798603 045765 705954

What It Is

This pivot bearing kit replaces the front caster fork bearings on zero-turn mowers like Hustler Super Z, XR-7, ATZ, FasTrak SD, Mini Z, and Super Mini Z. It uses an improved UHMW (ultra-high molecular weight) white plastic bearing disc instead of the OEM metal or standard plastic bearing, designed to reduce friction and wear in the caster fork pivot point.

Fitment & Compatibility

Before buying, verify your mower model and year. This kit fits Hustler Super Z, XR-7, ATZ, FasTrak SD, Mini Z, and Super Mini Z models. Check your existing part numbers: 344267, 263517, 798603, 045765, or 705954. Measure your caster fork stem diameter—this kit is for standard 5/8" or 3/4" stems (common on Hustler zero-turns). Also measure the bearing disc outer diameter and thickness to match your fork housing. This is an aftermarket alternative to OEM Hustler parts; it may not fit older or non-Hustler models without modification.

Key Things to Know

• Quality variance: The UHMW disc is tougher than standard nylon but may wear faster than OEM metal bearings if you mow on hard, dusty terrain. Check for grit buildup in the pivot area.
• Installation difficulty: Moderate. You’ll need a jack to lift the mower, a wrench to remove the caster wheel, and a punch or socket to press out the old bearing. The new disc slides in, but the retaining clip can be stubborn.
• Common gotcha: The kit includes two bearings—one per caster. Verify your mower uses identical bearings on both front casters (most do). If one fork is damaged or bent, replace it first.
• No grease required: UHMW is self-lubricating, but adding a light silicone grease can extend life. Avoid petroleum-based grease—it can swell the plastic.

Should You Buy It

Buy this kit if your Hustler zero-turn has a loose or wobbly front caster, or if the original bearings are worn and causing steering wander. It’s a cost-effective fix ($55) compared to replacing the entire fork assembly. Skip it if you need OEM metal bearings for heavy commercial use or if your fork stem is a non-standard size.