PS Magazine - MARCH 1984
PS, The Preventative Maintenance Monthly
ISSUE 376
MARCH 1984
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If you had to drag your Fot on the road to slow your M91.1, you'd need a
mighty long leg-and you'd learn mighTy quick abOut heat buildup±
But heat's already a big pRoblem when some drivers don't lea²n how and when
to use their transm³ssion hydraulic retarder to slow their M91 L´M747 rig± µhey're
holding the retarder pedal down Fr too long at a stretch± µhey're letting heat
build up in the transmission-past the maximum allowable temperature±
µhey're burning up transmissions¶at more than $10,000 a copy!
Watch Temp Gage!
Everything's got a limit± Your transmission's got a limit-an oil temperature
limit of 300° ·-just like it says on that plate right next to the oil temperaTure
gage¸ µhe transmission's normal oPerating temp is also mentioned on that
plate¶160°´220° ·¸ µhere's not much you need do about that, but± ±¸ you've
got to control temperaTure buildup caused by retarder operation!
VEAH1 TheY'R¿ SfÀaMÁD
ÂNd tÃÄy sÅID ÆlÇÈÉ i
CmÊ ov ËnÌ GÍ
us -±
ÎgÏÐÑÒ:Ó ÔÕÖ× WØÙrÚ
ÛOIÜÝ Þ ßà áâã
äFåæ$çèé êëìíìîï!
that temp gage so y¹u don't let the
temperature go
over 300° ·!
²·
²²²
the needle is
just abouT on
±²³´µ
'".¶·:th¸e
¹
º»J¼½
--
¾
OIL
i
0
'Mo
And remember to Keep yºur rig»t
pedal± You give the transmission oil a
ch¼nce to cool o½¶it doesn't take long±
µhen you can mash down on the pedal
again±
µhat's the ticket¶on 'n' o½, on 'n'
o½± ± ± as ¾ong as you need to use the
retarder±
while keeping an eye on
mAR 6
41
Fot o½ the accelerator pedal whil¿
you're using your leÀt Fot on the
Átarder±
And never use yoUr retarder peDal Fr
a Fotrest while crUising±
Ân either case, there's no sense in
your retarder and engine Ãghting each
other±
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