PS Magazine - TB 43-PS-432
PS, The Preventative Maintenance Monthly
ISSUE 432
NOVEMBER 1988
{
l'VE GOT
T
H
E
i
9-0±f BLUE
S
Make sure the hatch closes tightly,
: .
_±²
1,
±
O
A
² ³c
I
F
too. Test it by closing the hatch on a
\
´
±:²-³
²³.´µ_¶ ·
³
MY S
H
OE
S
µ
d
pIece of pa
er. ±f the hatch can't hold
¸
¹
·
.
the paper m place, your repair²an
l·\i
³
e´p
µ
your M90
¶
h
¶
u²²mg along
needs to adjust its latches.
happily mstead of smgmg the blues in
·
1º
the shop with these tips.
Periscope Scoo´
t
Eyeball the load bu²pers fOr signs
¸f you've traveled through rough
I
oF rot and wear. Heat, hu²¹dity, paint,
country, ºel the ML9AL periscope's
»
or cleaning solvents cause the bu²pers
locking thu²bscrew »r tightness be-
i
;1
1
±
H
to rot, p¼us the weight of the ¼oader
»re you open the driver's hatch. Vi-
wears the² down. ½f the load bu²pers
bration will loosen the thu²bscrew and
are shot, so is T¾W accuracy. Report
¼et the periscope f¿ll oÀ.
Bad bu²pers .
.-²³´µ
Áhe seal on the cargo hatch can go
bad quickly.
That ²eans dangerous
²es Ão² fired ²issiles seep into the
crew co²part²ent. Äeport bad seals.
OµEn thE HatCh and l¶¶k at tHE
·Eal f¶R Cut·¸ tEaR·¸ and ·µ¶t·
wHERE ¹t'· µuLlEd l¶¶·E
22
ºAmp »Ab¼e
Åyeball the raÆp's cab¼e »r slack,
kinking, or Ãaying be»re you release
the ra²p lock.
There should be no
slack, kinks, or broken wire strands.
½f
the
cable's
not connectÇd
or
it
Nov88
breaksÈ
the 400-lb ra²p f¿lls down
hard. Éhat breaks the rear periscope
and crushes anyone standing behind
the ra²p.
½AUNc¾er Moveme¿T
Êatch the loader »r jerky ²oveË
²ent
when
you're
lowering
the
laUncher Ão² ERECT to ST¾W. The
launcher should ²ove s²oothly with
no sudden drops of ²ore than
\¼
inch.
½f the launcher drops, report it. ¾peratË
ing with slack chains can bust the
chains and the launcher's gears.
BATTery PoWer
Êhen you 're operating the ¼auncher
in the field without the engine running,
keep an eye on the ÌÍTÎERY GENÏ
EÄAT¾R indicator. ½F ¹ts needle Dips
into the yellow zone, staÐt the engine,
let it war² up 3 to 5 ²inutes, then run
it at high idleÑ1,000Ò1,200 RPMÓ
Until the needle goes back to the green
Zone. This usually takes 20Ò30 ²inÔ
utes.
ÀÁÂ8.
O
±²³´:µ¶
ÃE
m
gREEn
Ä
Å
Nov 88
23
ÆyDrAU¼Çc F¼UÇD
Åyeball
the
hydraulic
Õuid level
every day. M901 hydraulic lines tend
to leak. ±f you add Ö¼u¹d every ºw
days, report it. You have a serious
leak.
For ºepAÇrme¿ ÈN¼y
Êhen you replace the floor boards,
tighten the turret guard bolts snug only.
±f you use too ²uch ²uscle, it's i²posÔ
sible to ×et the bolts out.
Øorget about ²akÙng the cargo hatch
locking
pin
Út
by
adding
lots
of
washers. ±f you have to add ²ore than
ɶnÊt tRY t¶ fËx hatCh l¶CkËng µËn·
wËtH ExtÌa wa·hEÌ·Í ÎEµLaCE thE
ÃRaCkEt and µ¹n
fOur washers, the hatch probably won't
seal tight.
Äeplace the locking pin,
NSN 2540Û00Ü040Û1120, and bracket,
NSN 2510-00-084Ý2989, to insure a
good seal.
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