PS Magazine - JULY 1983
PS, The Preventative Maintenance Monthly
ISSUE 368
JULY 1983
t
l
You've got only 10 minutes.Just 10
minutes to warm up your vehicle±s
engine witH the tRansfer gearcase dis-
engageD, that is²
³unning
the
engine
with
the
transfe´ gearcase disengaged for more
than
10
minutes
may
cause early
gearcAse
failure,
especially
on
the
M730 Chaparral µmissile carrier²
That±s because there±s still one shaft
tu´ning in tHe gearcase even when it±s
disengageD² Problem? It±s not getting
any lube!
So here±s the lowDown: ¶isengage
the transfe´ gearcase only when re·
quired unDer unusual conDitions such
as a cold¸weather start. Then run the
engine for no more than 10 minutes²
Don't run
engine more
Than 10 minutes
with geArcase
disengaged!
Low VolTage Fix
Got low voltage on
y
our ML13A2-series Vehic±e? If so, check out thE
¹egulator ci¹ºUit
breaker (Fig
4,
²tem 7, TM 9-2300³257-20P). COuld
b
the cap
screws, one of which holds the Voltage rEgulator cable tO thE circuit breaker, are
too long: The
y
´an bottom out and not make gOod cOntact. Poor contact, ±ow
voltageµ The s´rews
y
ou need, NSN 53¶5³00³068³0504, are ·-in ±ong. YOu'l±
»lso need
4 ±o´k washers, NSN 531¶-¶¶¸889³2528¹
Wa±er Pumps
Now
¼ou can
get engine coo±ant pump, ItEm 9, Fig 31, TM 9³230¶³257³20P,
without having to order its separate parts and assemB±ing itº UsE N»N 2¼30-
¶1-¶5½-½¾22¿
26
One of the most likely reasons oil
blows out of the transmission dip½
stick tube is a clogged transmission
vent Line²
¾oosen the nut on each end of the
vent line, blow out tHe line with an air
hose, anD ´einstall the ¿ine.
If the line is split, cracked or torn,
make a new one from bulk plastic
tubing, NSN 4710À00À805¸4149² The
nuts at each enD of the line are part of
elbow, pipe to tube, NSN 4730Á00¸
096Á8756.
The pa´ts are listeD on Page 65 of
CÂ to TM 9¸2300¸257¸20P² The NSN Ã Ä
shown for the elbow is wrong² Make a
note to use
Å
NSN 4730Á00¸096¸8756²
No PrESSure, No ²³aks
Æere's a tip for you carrier crew½
men
anD
mechanicsÇ
Check
the
hydraulic rese´voir breather every so
Èoften to make sure it±s not cloggedÉ
You crewmen shoulD wipe it off and
jiggle it severaÊ times often enough to
keep free movement²
You mechanics should m»ke sure
tËe breather is removed and cleaned
accorDing tÌ ¾O 9¸2300¸257Á12 every
quarte´²
If the breathEr clogs up, pressure
can build in tHe system and cause leaks.
27
_
MakE sURe
breather is
not clogged!
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