532437110 437110 Idler Pulley Arm & 532199471 & 532199478 Brake Arm LH/RH Kit - Compatible with Husqvarna/Craftsman Lawn Tractors, with 532199092 Spacer, Fits 917288663,250180, LTH 1538, YT16542T

What It Is

This is a multi-part replacement kit for the idler pulley and brake arm assembly on Husqvarna and Craftsman lawn tractors. It includes the idler pulley arm (532437110), left and right brake arms (532199471, 532199478), and the spacer (532199092). It’s designed to restore proper belt tension and blade brake function on select 42-inch and 46-inch deck models.

Fitment & Compatibility

Before buying, verify your mower’s model number (not just brand). This kit fits specific Craftsman and Husqvarna tractors like the 917.288663, 250180, LTH 1538, and YT16542T. Measure your deck width—this works with 42-inch and 46-inch decks, but not all. Check OEM part numbers on your existing arm and brake assembly: if they match 532437110, 532199471, or 532199478, this is a direct swap. The spacer (532199092) must be present or included; without it, the pulley won’t align. This is an aftermarket kit, not OEM, so confirm the pulley diameter matches your belt (typically 3.5 inches). If your deck has a different brake arm configuration (e.g., single arm), this won’t work.

Key Things to Know

• Quality: At 4.1 stars from 23 reviews, it’s decent for the price, but some users report slightly thinner steel than OEM. Expect it to last 2-3 seasons under normal use.
• Installation difficulty: Moderate. You’ll need a socket set and possibly a puller for the old pulley. Budget 30-60 minutes. The brake arms require careful alignment to avoid binding.
• Common gotchas: The included spacer may be too short on some decks—check your original spacer length. If your belt is worn, replace it at the same time. Ensure the brake arms are installed on the correct side (LH/RH marked); swapping them will cause the brake to drag.
• Check for rust: If your old arms are seized, penetrating oil is essential. Don’t force the bolts—they can snap.

Should You Buy It

This kit is a solid budget-friendly fix for DIYers with a compatible Husqvarna or Craftsman tractor who need to replace a worn idler arm and brake assembly. It’s not for heavy commercial use, but for home lawn care, it’s a practical choice if you confirm fitment and are comfortable with basic deck work.