Yetter 500 Series Operator's Manual page 7

4400 SERIES ASSEMBLY INSTRUCTIONS
Step 2: Install the 5000-323 lock-up pin in the storage location on the mount brackets.
Secure with the supplied hairpin clips.
Step 3: Attach the pivot arms to the mount brackets using the 5/8 X 3 bolts, pivot bushings, & lock hex nuts.
Fully tighten all hardware. NOTE: Make sure the pivot arm orientation matches the diagrams below.
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