PS Magazine - JANUARY 1975
PS, The Preventative Maintenance Monthly
ISSUE 266
JANUARY 1975
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•
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t
·
It's like you-running down a steep h±ll. You run faster ²n² faster. PrEtt³ soon,
you
can´t get your feet out in FonT
d
³oU quiCk enoughµ You hit your l±m±t! Pow!
You crack up!
¶ngine R·M is up to you¸ the dr±v¹rµ Watch itº
Ke¹p an e³e on th» tachom¹ter. Most big trucks haVe a tach¼ It tells ¹xactL³ tH¹
RPM your engine ±s tu½±ng¾
Some trucks haVe a red "Danger¿ aÀrow on the tachµ Áhe ta±l o this arrow is r±ght
at the top safe RPM limit. Or your Ã10 operator²s ÁM giVes you the RPM L±m±t
for your truck's en giÄe.
Áake those 5Åton Æucks covered B³ ÁMÇ9Å2320È211É10 (Apr
73):
ÊPage 2Å26¸ para 2Ë18a(8)¸ RPM
lim±t for the gÌsol±ne eNg±ne ±s 2¸800.
ÍPage 2Î26¸ Ïara 2Å18B(Ð0)¸ RPM
lÑmit fÒr the stra±ght d±esel engine ±s
2¸100.
ÊPage
2Ó28¸
Mult±fuel
A±lments
chartÔ RPM lim±t Õor the ÖuLt±×U¹Ø
diesel eng±ne is 2¸600.
the tachoÖeterµ
Áhey don²t sh±ft down to let a Low¹Ù
gear slow tÚe truck.
Or they don²t use the Brake to h¹lp tH¹
lower geÛµ
With all of that truck ´n´ cargo we±gHÜ
Ïushing¸ Ýngine RPM goes uÞµ Part
ß
s àhÌÜ
go up án² down start to âãoat.¿ Parts àhaÜ
sp±n around start äy±ng to p±ecesµ Áhe enå
gine starts coÖing apart ±nside as RPM
goes oVer the limætç
Pow! A couple of hundred dead horses!
-±².
TOP OF THE BOTTOM
What tops ²em all is the gu³ who coasÜs è±s truck down a h±Llµ
ée shiêts ±nto neutral. Or he hoLds the clutch pedal down. Áhe eng±n¹ës haÀìí³
tu½±ng oVer at alLÊBut the truckës Barr¹íing doîn that hill l±ke a BoBsled
on ±ceµ
When heï hits the Bottom o× the hill¸ olð Sport slams ´er ±nto gearñor h¹ L¹ts up
on th¹ clutch òedaló
Pow! Áhe engine goes! Aôd proBÌBLy the clutch! And the transm±ss±on! õnì ÜH¹
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