Dynojet Snowmobile Dynos: Installation Guide - Manual (Page 8)

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DO NOT LIFT THE DYNO BY THE ARMS !
Step 7
Install the jack with the pin and cotter keys on top
and the 3/8” bolt in the bottom.
Step 8
Install the brake cover, it attaches with (5) 1/4”
button head screws. Two screws of the front, and
three screws on the rear.