Window balancer for Milgard 36" single hung windows

Question

I have 3 broken balancers in 3 different windows and they are all the same as pictured. All the windows are 36", with 3 sets of double windows in a 6' opening and 2 single windows in a 3' opening. The sash widths are slightly different at 33-5/8 for the singles and 33-7/8 for the doubles if that affects anything, but they have the same balancer. The balancer cord has a hook on one end that hooks onto the window frame. I have more pictures if needed. What is the price and availabilty for pre-assembled balancers?
These are 24 years old and all broke within a very short period of time. Is there maintenance I can perform to prevent future breakage?

Lauren · Accepted Answer

Hello, thank you for posting,

With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

Please note that we can only supply balances on the full inch. Take a look at the 27" balance with a 2640 stamp option.

If the balances are constantly breaking it could be that the spring is too strong. A 2640 stamp option supports a 19 to 26 lb window sash. Are you able to weigh the sash and confirm the exact weight?

Let us know what you think and if you have any additional questions.

Comparison of the S378, S380 and S385 balance shoes.