PS Magazine - DECEMBER 1980
PS, The Preventative Maintenance Monthly
ISSUE 337
DECEMBER 1980
W
.±
-
ase
on
Two things are happenIng thAt can snap ±he actuA±OR arm oN the M 198. They
were bo±h dIscovered af±er TM 9-²025-211-²0 (³c± 79) was prIn±ed.
²´ When they emplAce the howI±zer, CannOneers µO.
3
aNd
4
some±Imes
keep on pumping even After ±he wheels are All ±he way up. ¶here's no place for
the extra pressure ±O go, and the ActuatoR ARm gets sNapped.
·view the s±eps fOR emplacIng ±he howItzeR IN ¶M 9-1025-211-²0.
¸annoneers have go± tO stOp pumpIng ±he mOmeN± ±he ROad ARms ReAch ±he
stops on the carrIaGe. ¹Ny pumpIng af±er tha± caN breaK ±he actua±or aRm.
SurE.
I
. \
±1
;,
\vrW
t
1 ±
T,V²³´
-l'JV/:
1²'³r-´
±
µ_¶·¸
¹¹"º»¼½¾¿ÀÁÂ=ÃoÄÅeÆÇÈÉÊË,ÌÍÎÏÐÑ
2´ The s±eps In yourº²0 manual on
PReparIng ±he howI±zer fOR ±OwIng do
to a pOIn± halfway between ³FF and
»ot release all ±he hydraulIc pRessure
U¼ and hold it there untIl ±he sOuNd Of
½HeN
the
W¾EELS
leveR
on
±he
manIfold Assembly Is changed fROm
U¼ to D³Wµ´
Unless yOu release ±hIs pressure, the
weIgh± of ±he hOwItzer wIll bear down
on the ac±ua±Or Arm even after ±he
µ
wheel
¿OcKs are In place. ThIs eX±ra
weIght
cAn
eventually
cracK
±he
I
¶
i·¸¹º
À\ÁÂc±uator Arm.
\_)±
TO
pReven±
thIs,
Read
yOur
Ã10
maNual
about
preÄaRa±IOn
Of
±he
hOwItzeR
fOR towINg.
TO keep ±he
actuA±or arm frOm cracKIng, af±er yOu ±he escapIng pRessuRe has stOpped´
hAve dONe S±ep 15, dO ±ÅIs as S±ep Then tuRN ±he lever BacK ±O ±he ³FF
15Æ.
posItIon and gO ahead ±O Step 16.
Drive Sprocket Torque
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