PS Magazine - TB 43-PS-437
PS, The Preventative Maintenance Monthly
ISSUE 437
APRIL 1989
M102
Towed Howitzers .±²
.±²
³hEl´'5
W ONG InFµ
±²
1M9-¶·L¸¹23º»¼½
ON THE
m¾¿À
AÁÂgÃÄÅÆÇ
DÈV¶CÉÊ
I
nfrmation in
ËÌ ÍÎÏ0ÏÐÑÒÓ4ÑÏ0
fr the
ÔÕ0Ò
leads you to believe the
ÌÕ40
alignment device can be used
to Boresight tHe weapon. Wrong!! Lt
only veriFes boresight.
Here are the TM changes to fllow to insure a correct boresIght beFOre your
next Firing ±Nission:
Change Paragraph
ÒÖÏÒ (8)
on Page
Ò×46
to read-"Weapon is bore±
sighted. I² not, conduct
ÌÏ40
a³ignment device comparison test (Page
ÓÑ60ØÙ
·
A´er veri²ying the accuracy o² the
ÌÏ40,
i² the pantel azimuth counter
exceeds the tolerance o² plusµorµminus
0ÙÐ
mil, boresightinG must be con±
ducted using the test target or dist¶nt aiming point method befre the
weapon can be ·red¸¹
De³ete Paragraph
ÒÖÏÒ ÚÍØ
and
ÚÛ0Ø
on Page
ÒÑ47,
a³onG with tºe t»o
·gures above those items.
Change Paragraph
ÓÑÓ4 ÚÛØ
on Page
ÓÖ6Ï
to read-"Check borEsight
using the
ÌÕ40
a³ignment device.¹
Delete P¼ragraph
ÓÑÓ4 Ú6Ø
on P¼ge
ÓÖ6ÏÙ
Bottom l²ne: The ML40 aliGnment device is not a boresight device. Make ³o
Fire control s²ght adjustment assuming t´at it isµ
³´
APR 89
M101a1
Towed HowÜtZer ÝÝÝ
All Set With Set Screw
m4a1
RaÞßà
QuadáaÞt Báackàt
W
²t¶out the set screw that holds t¶e M23 telescope mount to the M4A· range
quaDrant bracket, there's no way to ²nstall the M·6A· elbow telescope on your
M·¸·A· ¶ow²tzer¹
So, aDD th²s ²nForºation to PMCS »tem 14 on Page 2-21 oF TM 9-1015-203-12¼
"Check to see that set screw is present and se½ur²ng M23 telesco¾e mount to
M4A· range quaDra³t bracketµ¿
Make it one oF your weekly c´ecks until the TM ²s updatedÀ
mµ01a1
âowed ãowÜäers ².Ý
Alignment Checks Added to PMCS
T
M 9-1015Á203-12 does not have all you need to know FOr weekly PMCS fr
Âre control al²gnment checksµ Make these Ãotes until your TM is updated:
Under Item
ÛÒ
fr the pantel, change tHe
checK ²or the azimuth micrometer Knob
ÚÓÛØ
to
read "check fr smooth oper¼tion without stick±
ing and/or binding o² ge¼rs.¹ At the end o² the
³ast sentence, add "½o to ¾age
ÓÎ70
fr ·re con¿
trol alignment tests ¼nd me¼surements.¹
T´e reÄrence to backlas´ is deletedÅ
APR 89
³³
Under Item
ÛÓ
fr the
ÌÒÛåæ
te³escope moÀntÁ add "½o to Page
ÓÑ70
fr ·re control alignment tests
and measurements.¹
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