Non Tilting Window Balance

Question

Looking for Balance Model info:

Window model:
Yale Ogron Mfg.
Series 500
DH-R40/FER
Specifications ANSI/AAMA 101.88 AAMA 1302.5-1976
NOA 90-0220.5 EXP 11-6-93 EL 35'

The balance:
18 in long only metal part
only identifier is "17 A"

Attached photos of the ends.

Casey · Accepted Answer

Hello,

It looks like you have either our S351-29, with a 15-002 bottom attachment, or S390-29, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. Based on your 17A stamp, you'll also need a 1710 spring strength option for your replacement balances o support a sash between 5-8 lbs. Thank you!

Comparison of the S351 and S390 balance shoes.