Block and Tackle

Question

Good morning. An AC repairman broke the block and tackle rod that holds the window open, and I am looking for a replacement. The type of rod and type of window is attached. There are no identifiable serial numbers or manufacturer - it looks to be 34" long, for a metal window frame that opens both up, and swings down.

Thank you!

Casey · Accepted Answer

Hello,

It looks like you have either our S351, with a 15-002 bottom attachment, or S390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. I'd recommend double-checking your length measurement to make sure you only include the metal channel.

Comparison of the S351 and S390 balance shoes.

How to measure the length of the Series 351 channel balance.

You'll also need to check the metal channel for a stamp code to choose the corresponding spring strength option for your replacement balances. Thank you!