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216
SIENNA_OM_OM08035U_(U)
4-1. Before driving
Use the correct trailer ball for your application.
Trailer ball load rating
Matches or exceeds the gross
trailer weight rating of the trailer.
Ball diameter
Matches the size of the trailer cou-
pler. Most couplers are stamped
with the required trailer ball size.
Shank length
Protrudes beyond the bottom of the lock washer and nut by at least 2
threads.
Shank diameter
Matches the ball mount hole diameter size.
■ Matching trailer ball height to trailer coupler height
Selecting trailer ball
Trailer class
Typical trailer ball
size
IV
2 5/16 in.
II and III
2 in.
I
1 7/8 in.
1
2
No matter which class of tow hitch
applies, for a safe trailer hookup, the
trailer ball setup on must be proper height
for the coupler on the trailer.
Coupler
Trailer ball
3
4
1
2
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