PS Magazine - TB 43-PS-496
PS, The Preventative Maintenance Monthly
ISSUE 496
MARCH 1994
hen the exhausT flex pipes on M915-
series and
M915Al
TRucks sTaRt Leaking,
mechaniCs, tightening the clamps
won'T sTop it. IT±l² just make ³t"wo´seµ
¶he Flex pipes don±t
f
over or in·
side The exhaust pipes¸ ¶hey are f¹tted
aT the ºacTo´y To butt aga¹nsT the exhaust
pipes» Once that mating is distu´bed,
¼eaks star½¾
¶ighTening the clamps (which a´e Re¿
ally couplers) wilÀ just make The leak
wo´se¸
Make sure all parts of the exhausT
system a´e in good shape and mating
properly» IÁ they'´e not replace Them¾
PS 496
Flex pi±es Too BIg?
On The other hand, the´e are Reports
oÁ ºlex pipes ThaT have a tooÃlarge diam¿
eTerÄ Ånstead oÆ about
5
inches acrossÇ
they are about
²L/³
inches across. ¶his
keeps the Flex pÈpes and exhaust pipes
from matching up wiTh The couplerµ
ź you Æind f¼ex pipes That are Too
b¹gÉ use a meTaÊ shim until you get ½he
right pipesÄ
make the
shi± Fro±
²³´S inch
ThIck ±etaL
µNd shµpe
iT Like so:
W´ap the Shim around the end oÁ The
exhaust pipe. ¶his b´ings The exhausT
pipeËs diamete´ to about
51/´
Ìnches»
Íhe flex p¹pe can then be buTTed up to
the shimÎ Ïecure the pipes with The
couplersÎ
µ¶
MAR9·
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