PS Magazine - MARCH 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 232
MARCH 1972
AI R COMPRESSOR CHECKS
- air
pressure oper±tes
the
service br±kes so
m±ke su²e your ±ir compressor's he±lthY.
T±ke off the engine ±cces³ coVer
(it
DEAD BA´ERµ HAZARDS
-¶here
±re
2
w±ys you c±n wind up Wit· de±d b±t¸
teries oN your
M656
series truck without
doing ±ny¹hing th±t seems wroºg:
tells how on p±ge
3-22
of your
T 9-
.±²³´µ¶·¸
2320¹230º10)
±nd loo» oVer the compres¸
sor driVe belt for cuts, bre±ks, etc¼ The
±utom±t½c tensioniºg pulley s¾ould keep
the belt good ±nd t½ght¿
pressor ruÀsÁ Âoes the belt slip, ½Ã there
oil
le±k±ge,
is
the
compressor
noisy?
anytime ± compressor f±ils by oVerhe±t¸
ing in one spot ±t the cr±nksh±Ft pulley,
get the compression repl±cedÄ Åt m±y
seem servÆce±ble but itÇs ± boobyÈtr±pÉ
»¼
First way. You stop the engine with the
fUel cUtoff switCh and then go away± THe
next day yOU can't Get tHe tRUCk staRted
becaUse ²he ba²²eRy is dead³
½¾
Second way± This time yoU aRe CARefUl
to sLUt off the masteR switch bUt yo´ still
have a µUn-down battery the next day¶
Êhy? Ëec±use you (or someÌody) left
the personneL he±ter ÍUÎÏÐÑÑÏÒT aÍT
sWitch iº the ÍUÎ (uÓÓer) Óos½tion¼ Th½s
kept the persoºnel he±ter FÔel pump runÕ
ning eVeº though the m±ster switch w±s
ÐÑѼ
ÖRA×SØER ÙRAÚMA
ÛÒome driVers just
c±n't keep their h±ºÜs off the
tr±nsFer
c±se ±xle selector leÝerÞ They ßl±y w½th it
by Flipping àt up ±nd doWnÁ Ëec±use oF
this h±bit they might be dáiÝiâg in aãä
åãæÒ down the highw±y Without eVen
know½ºg ½t, wh½ch We±rs oçt the tires àn
± èurry¼
éRA×SMISSêO× ÖêëS
ÛThe allison TXÏ
200º6
tì±nsm½ssion is fílLy ±utom±tic but
it neeîs èelp ïrom you to put it in the
r½ght r±ºge For conditions oF terr±in ±nd
lo±î¼ Ñor extreme lo±ds, gr±des or other
he±ðy pulLingñ st±rt in
1º2
r±nge ±nd upò
shiFt into
3
Ï
4
,
3º5
or
3-6
±s neededÁ
loW the m±óimum speeds shown in fig
2¿
20
of youì
tM 9-2320À230-Á0Â
7
Òome tr±nsmissions h±Ve been busted
uÓ bec±use the dìiVer forgot to come to
± comÓlete stoß ±nd let the enGine drop
b±ck to idle
(500ÃÄ00 RmÅ
With the shift
leVer in Î
(neutr±l)
beôore sh½fting to
±nother speed or reVerseõ
tr±nsm½ssion
is
not
supöosed to Work ±s smooth
a
±n ±utoÕ
mob½Le tr±ºsmiss½on, ±nd it woº't÷ øu
m±y feel ± little jolt ±s the tr±nsm½ssion
upsh½fts or
îownsh½fts
Within ±
giVen
r±ngeù Tú½s
is
norm±l ±nd
nothing
to
Ìother your mech±nic ±bout¼ ûoweVer, if
àt ±lmost sn±ps your he±d oFf your s¾ouldü
ers, check for loose c±b mounts before
decid½ng
th±t
yoÔ'Ve
got
tr±nsm½ssion
troubleý
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