(2) 587973001 (1) 587969201 Pulleys – 580364609 Belt & Pulleys Kit Compatible With H-usqvarna A-WD Belt Repair kit, for H-usqvarna L 321AHX, L 321AH, Pulleys replaces 580364603 (Pulleys Belt Kit)

They replaced the old ones and work great, easy to install. Word of advice buy the belt at a dealer not Amazon. These were to replace the pulleys on a Husqvarna 20″ awd walk behind. The mower was 9 yrs old and was the 1st time I needed to replace the belt and pulleys. The awd feature was no longer working and belt was smoking because the pulleys were freezing up. Time to replace, I’m not a mechanic but mechanically inclined so I was pretty sure I could handle it. I bought these pulleys on Amazon and the replacement belt as well. The pulleys fit and work great but the belt Amazon sells fits multiple models and they are not inexpensive. I went through two new belts, they fit loose, started to smoke (burning a belt) and didn’t drive the mower properly. I went to a dealer bought the right belt and it works like I’ve not had a problem since. Highly recommend the pulleys. [...]