Marvin casment window crank

Question

I have 13 Marvin windows with worn out cranks.
They were installed in 1986. Entry Gard Truth
The numbers on the part
long arm 30470 LH
Short arm 20810
connected to short arm L30841
Gear plate 30830
40372

If we can identified this, I will need 6 Lt and 6 Rt.

Tom · Accepted Answer

Thanks for reaching out to us! Your operator is very similar in design to our 39-031 and 39-032. I recommend looking these over just to be 100% sure that everything matches up, but otherwise this would be my recommendation.

Dimensions for 39-031