PS Magazine - JUNE 1986
PS, The Preventative Maintenance Monthly
ISSUE 403
JUNE 1986
M102 Towed Howitzer .
.±
Move
It
or Lose
iT
Move and stake, move and stake. That's the way to stake down your
M 102 towed howitzer.
If you drive stakes in the ground without traversing ±he M² 02, you're
swinging a sledge hammer dangerousLy close ±o the Lower eLevating gear
housing, fire controL instruments, and other vuLnerabLe parts³ One mis-
placed swing can damage the howitzer.
When you Pull the stakes, traveRse and then go after the s±akes with a
carriage stafF and sledge. Otherwise, you don't Leave yourseLf prying ´oom.
µemove the stakes
bEfORE
you lower ±he wheeLs. ¶uLling stakes w·th the
wheeL actuator system may seem like a good swea±¸saver, but aLL you do is
break the actuator crank.
Traversing befoRe
stakIng prevents
unwanted bReaking
M1A² ColLImato³ ´±±
loosEn and MoVe
Some careLess operators are rUining
cLamping knobs by yanking the coLLi-
mator up or down or Left or right¹
When you lock ±he º² A ² co»Lima-
tor in pLace with the azimu±h and
elevation clamping knobs¼ the onLy
things keeping the knobs LockeD are
pLas±ic washers³
If you move the coLlimator with½
out first LooseNing the cLamping
knobs¼ you'LL strip those washers¾
That's a ¿S repair job to repLace
20
±HemÀ µemember: Áoosen the KnobsÂ
then move tHe co»Lima±or³
Don't move
Up oR down,
left oR Right
wIthout
Loosening
azimuth and
elevation
µ"¶'-•
• _ ±
knobs
JUNE 86
M1²0A2 SP how·tze³, M578 ¸ecove³y Ve¹Icle .±±
. PM
A
ded fOr RoADwhee±, Id²Er ³
r
ms
·
;:±²
-± ²
.
e
-=
1
Ãrm troubLes can deadline an
M 1 ²ÄA2 or M578 just the way they
put pitchers on the bench.
What gets to road wheels and idler
arms? Water or dirt in the bearing
cavities, seals installed wrong and
lack of lÅbe.
You mechs can preVeÆt many of
the vehicle's arm troubles by adding
a fEw steps to your next scheduLed
semÇannÅal and annual maintenance.
S²miannual Maint²nanc²
.
AdDition
-
s
·
Èor the ±raiLing idLer arm onlyÉ
remove the drain plug on
Ê
both idlers.
Áet any water drain out. µun your
finger arouÆd the inside Ëf the drain
hole. If you feel metal shavings, take
the arm apart and repair the damage.
Otherwise, reinstall the drain plugs.
JUN³ 86
2´
Annual Maint²nanc² ADDitions
Ìor BotÍ idler aÆd road whÎel
armsÏÐÅll aLl the arms anÑ remËVe
the ÇnÆer aÆd oÅter BearingsÒ Óiscard
all old seals aÆd gasÔets.
ÕyeBall the arm hoÅsÇngs. Ö× aÆy
are ËÅt Ëf rËÅÆd Ër elËÆgatÎÑØ rÎÐËrt
it to yoÅr ÓÙ ÅÆit.
CleaÆ the bearÇÆgs with solVeÆt
ÚÛÓ¸680 and dry completely. Üook
for damagÎd Bearings. µeplace aÆy
that arÎ Bad. µepaÝk beariÆgs wÇth
GÃÃ.
•
³
MAke S±re ²He
(
... AN³
INBOArd sEAl
O±²BOArd SeAl
lIp FAceS
lIp FAceS
INWAr³ ´.µ
O±²WAr³
I
´
Install the iÆner and outer bearÞ
ings, using new gaskets and seals.
Make sure the inner seal lip fßces the
hÅLl and the outer seal liP fàces the
arm. átherwise, the lÅbe yoÅ and the
crew aÑÑ latÎr âon't dË aÆy gooÑ at
all.
Èinish up by reinstalling the roadã
wheel and idler armsä
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