PS Magazine - DECEMBER 1985
PS, The Preventative Maintenance Monthly
ISSUE 397
DECEMBER 1985
,
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1v±t:sene-S
.²³
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HotTer Plugs FighT fouling
Getting poOr engine
perfrmance and a lOt OF
spark plug fuling? Chances
are yOu need a hOtter plug.
Standard plugs, NSN
2920-00±234²2338, are
intended fr high-speeD,
cOntinuOus engine OperatiOn.
These plugs su³er
´Om carbOn builDup in
sLOw-speeD, stOp±and±gO
OperatiOn. Carbon
causes a weak sparkµOr
prevents sparking
aLtogether.
Match plugs tO the
missiOn. Use hotter plugs,
NSN 2920-00-9¶±1297,
l
fr mOstly LOw engine speed{·
Operations. These plugs
holD heat that burns O³
carbOn befre it has a
´
·±
·
chance tO build uP.
µ
q
•±
¶
STeeL Gage A±RacTs ²RoubLe
HOlD it, mechs! YOu'lL attract a Jot OF trOubLe ¸sing a steel Feeler gage tO check
the air gap in yOur
l
¹/4-tOn truck's diºtributor.
A steeL gage will magnetize the reluctOr. Then the engine wilL mis»re. When
-
the reluctOr is magnetizeD, it's r¼ined.
B±g trouble!
,·¸"¹
7º
.
Steel feeler
gage
OUC/²
I»M
R³´NEDµ
Steel feeler gage transfer¶
magnet±sm to the reluctor
Always use a nOn-magnetic ½eler gage tO check the air gap. NSN
5210±01-026-9571 is fr the brass gage listeD as a special tOOl in TM
9²2320-266-20¾.
42
DEC 85
Keep BRake Hose in The C³ea´
The i¿prOved rear diÀerential mountÁ
ing bracket On 1/4²ton trucks can wear
a hOle in the brake lineµleaving yOu
with nO brakes.
ÂOOk fr at least 1/8Ãin clearance
Between the hOse and the tOp OF the
bracket and at least 1/2-in space where
the hose cOmes Out at the bOttOm OF the
bracket.
NOt enOugh clearance? MOve the hOse by gently bending the brake line at the
"TÄ anD by t¼Rg the hOse clamp On the tOP OF the rear suspenºiOn arm. CareÅl,
tho! ÆOn't mOve them any mOre than yOu
Ç
neeD tOÈ
When yOu get the line in the clear, have a buDDy aPply the braKes while ÉOu
check fr any leakÊ causeD by mOving the line.
DEC 85
43
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