I doubt you can, since Allis Chalmers apparently quit making tractors back in the '80's. However, an internet search reveals there's an Allis Chalmers Garden Tractor Club, and here's a thread discussing another of these machines, maybe their questions are similar: http://simpletractors.com/Club2/topic.asp?ARCHIVE=true&TOPIC_ID=19589
I doubt you can, since Allis Chalmers apparently quit making tractors back in the '80's. However, an internet search reveals there's an Allis Chalmers Garden Tractor Club, and here's a thread discussing another of these machines, maybe their questions are similar:
http://simpletractors.com/Club2/topic.asp?ARCHIVE=true&TOPIC_ID=19589