PS Magazine - AUGUST 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 237
AUGUST 1972
-
I
l
CRAcK
Magnetic" clutches on your MSS
l
±heri-
dan Are made for u²ing, not abusing.
It doesn't work out that way³ though,
if the gunner or TC Forgets ´o hold down
his palm sWµtch until his control hanDle
is in neutral¶
Letting go of the pal· switch while the
turret is still traver²ing (or the Gun tUbe
is Rising or lowering) can cause:
1. A bent hypoid PINIo± gear sHaft IN
tHe traveRse mecHaNIsM²
±\²lL
2² BurNed-out
tuRRet
drIve s
y
steM POw³
er
supPly,
motoR
geNeratorS or ser´
-;:±²³´µ¶·
vo drive
motorsµ
TUrrET
M
.
³´uTµHE
THe
motor
geNeratOR
Has
2
Speeds;
a
begINNiNg
spEed
of
around 4¶600 ·¸¹ durINg WHicH No
load sHou ºd be PLaceD oN It» aNd aN
oPeratINg speed oF about 9¼200 to
WHIcH It shifts automaticaLly ½N 2 or
3 secoNdsµ
¾o¿ beFore movINg your coNtRol
HaNdle¿
WaIt uNtÀL you HeaR tHe
HIgHÁPItcHed WhiNe tHat tells you
the motor geNerator Has reacHed
its oPeratINg sPeed²
ºF you try to operate WHeN It Is
stilL ½N LoW sPeed you caN cause
damaNge to tRaNsIstors aNd otHer
electrIcaL mIserIes.
YO¶r HE·P
Suddenly reversing
direction of traverse
Is another thing that
can
break
up
your
turret
drive
±ystem.
²n±teaD of ±lamming
through neutral, wait
there a coUple'a ±ec-
onds
BefOre you go
on³ That way your mo´
tor generator and se
r
µ
vo motor wi ¶² have a
chance to catch up tO
the change in direc·
tion¸
¸f
the
air
comPresso¹
on
your
TM 38º750 »¼ec
69),
pages 3½26
M551 ±herid¾n µs giving you ´rou¿
to 3º30 ´ell² how to make out the
HÀe²,
Ánd
µn
an
EIR
gµving
the
EIR.
±end it toÂ
detailsÃ
Äe design engµnEr² are looking
For aÅl the inFo they can get to help
a:±=_
CommaNd GeNeraL
U¾µ Army ¹obIlity ÃqÄiPmeNt CoMmaNd
ATTÅ: A¹¾¹Æ´¹AÇÈ1É
43Ê GoodfeLLoW BOËLÌvard
¾tµ
LOUis¹
¹IssouRi 63Í20
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