Rust or dirt on the wheel, or on the parts to; which it is fastened, can make the wheel nuts; become loose after a time. The wheel could come- Page 251

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7. Remove any rust or dirt

from the wheel bolts,
mounting surfaces and
spare wheel.

CAUTION:

Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could come
off and cause an accident. When you change a
wheel, remove any rust or dirt from the places
where the wheel attaches to the vehicle. In an
emergency, you can use a cloth or a paper towel
to do this; but be sure to use a scraper or wire
brush later, if you need to, to get all the rust or
dirt off.

CAUTION:

Never use oil or grease on studs or nuts. If you
do, the nuts might come loose. Your wheel could
fall off, causing a serious accident.

8. Install the compact 

spare tire on the
wheel

-

mounting surface.

Then replace the 
wheel nuts with the
rounded end of the nuts
toward the wheel.
Tighten each nut by
hand until the wheel is
held against the hub.