It is a Model #13ah451f088

Its part # 50 .I always hook one end on , then I use a piece of pull rope about 3 feet long run it through the other end of the spring double it over and pull , and hook it in place . Sometimes it handy to have another person to put the spring in place while one pulls.
This is a trick I use every day.
Luck DG

Forgot diagram sorry.

Thank you so much
Jerry