The belt chart shows a 3/8" x 31 11/16" belt for your 122.
Go to Resources, then Technical Library - Tractors, then to Belt Chart, then click on the URL to find the chart.
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John
Proud Owner of a Model 100 and a Model 124.
A homemade cart, 2 x 42" mower decks, a 38" deck,
a 42" front NF blade, and a lawn sweeper!
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