Cheryl,
The 20-0053-4001 is a discontinued Yale 50 Series. The 0053 is telling me it is an old style closer, with a size 3 spring. You can use a newer Yale 50 Series, but the hole spacing will not match up. Of you can use an International Door Closer 883, which would have the same foot print as your current closer.
Yale 50 Series: https://www.rbadoor.com/yale-door-closer-51-series.html
International 883: https://www.rbadoor.com/international-door-closer-883p-series.html
Greg
1-800-642-2403