TM 9-243
TYPES AND USES - Continued
SPANNER WRENCHES (Cont)
There are two basic pin-type wrenches. The fixed-pin
face has been designed to fit a particular pattern and is
nonadjustable. The fixed-pin face is used to remove
protective cover plates. The adjustable pin face has two
arms joined at a common point. The other end of the
arms contain pins which may be engaged in the holes of
a cover plate for removal.
SAFETY
1.
2.
3.
4.
5.
Wrenches should fit the nuts or bolts they are to
loosen or tighten.
Never turn adjustable wrenches so that the pulling
force is applied to the adjustable jaw.
Do not attempt to extend the handle in any way to
increase the leverage on a wrench. Increased
leverage may damage the wrench or the work.
Apply penetrating oil to rusted nuts and/or bolts that
resist turning. Allow time for oil to penetrate before
attempting to turn.
Do not strike wrenches with hammers to tighten or
loosen nuts or bolts.
6.
7.
8.
9.
Do not exert a hard pull on a pipe wrench until it has
gripped the work firmly.
Remember to pull on the wrench, when possible, in
order to protect your knuckles in case the wrench
slips.
Return all wrenches to their proper places upon
completion of each job. This eliminates the possibil-
ity of leaving them where they can injure someone.
Always keep the wrench in good condition, clean
and free from oil or grease. Otherwise it may slip,
resulting in possible serious injury to you or damage
to the work.
25-13
