PS Magazine - FEBRUARY 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 243
FEBRUARY 1973
cotter pin holes may not line up with the
sLots in the nut.
When this happens, run-uP the Nut to
the low torque limit and, without stop±
ping, tighten a smidgen more . . . just
enough to get a hole or slot lined up.
±² ³
RUN NUT TO
LOW TORQUE
LIMIT .
..
²ever grease OR OiL a fasTener Unless
yOUr eQUi³menT's ³Ub says sO. ´ubed
ThReads ROUGHLY means YOU'Re incReasinG
the Upµr TOrQUe limits since tHeRe's less
run-Up frictiOn.
¶n dry·bolTed cOnnecTiOns tiGhTened
frOm tHe nut side, abOut
So
percenT Of The
tOrQUe is Used to OvercOme frictiOn. ¸he
oTheR ha¹f is RespOnsible fOR the bUilTCin
tensiOn pUt on the bOLt. ¸OrqUe tables are
fOR "dRYº applicaTiOns.
54
²eVer use gues»¼orque if a job calls fOr
tightening a single item of a series.
½ike
mayBe
yOu're
replacing a sPark
plug.
¾se
a tOrque
wrench for correct
reading on each plug or you're likely ¼O
get a change in the spark gap, or you
could wind up with a busTed plug¿or
wOrse.
´ike a¹l precisiOn tOOls thAt get a lotta
¶Verloading will also permanently deÀ
use, a tOrque wrench needs an accuracy
form the ÁOrque sensing element. Set all
checkup,
regular like.
Scratching, etchÀ
tOrque wrenches back ¼o zero after using
ing,
oR
denting the TOrque  measuring
'em. Ãheck those in storage. If they are
Äam
on direct reading tyPe
wrenches
not zerÅd, tag 'em fOr calibration.
changes the calibraTion.
¸´Ã¿tender lOvin' careÆmeans never
drOpping Or carelessly tOssing wrenches
Ç final word.
abOut. S¼Ow 'em in a drY place and prOÀ
Çs Tight as YOu can geT it Plus one turn
tect 'em from sHOck Or damage. If yOu
wOn't hack it in MÈ Ç!
should accÉdenTally drOp a Torque wrench,
have it re-calibRated, prOnTo. Make sure
its DÇ ´abel is On, readable and upÊtoË
date
-±²
.³ ´µ¶·¸
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