PS Magazine - TB 43-PS-708
PS, The Preventative Maintenance Monthly
ISSUE 708
NOVEMBER 2011
10
PS 708
NOV 11
11
PS 708
NOV 11
1. Tube Serial
330
Cumulative EFC RDS fired for Cannon:
6.150
5. End Item Idenification
SN: 521
(Howitzer, Light, Towed: 105mm, M119A2)
7. Cannon
Serial
307
3. ORGANIZATION (UIC/UNIT)
WABLTO
(FA RGT 03 HHB)
6. RDS/EFC COMPUTATION
8. Retubings
0
9. Rebushings
0
2. Cannon Type, Model or Series
M20/M20A1/M119A2 Cannon, 105mm
Howitzer
C
rewmen, the M88A2’s main winch has two sets of limit switches. Both play very
important roles.
The
Frst
set
limits
the
angle of the winch cable as a
load is being pulled in. They
automatically shut down the
winch if the angle goes beyond
5° in either direction. The
second set of switches shut
down the winch if the cable
starts to bunch on the reel.
Some operators don’t like
limitations. They disconnect
the switches so they aren’t
limited when using the winch.
Bad idea!
Operating
without
the
limit switches will overstress
the winch and can cause a
breakdown. And if the cable
doesn’t reel in smoothly, the
added stress can break off the
corner of the winch housing.
The breech block is part of the M119A2’s cannon assembly, along with the muzzle
brake, cannon tube and breech. If the breech block ends up with the wrong cannon,
there is no longer any way to accurately track rounds Fred and the life left in the
cannon assembly. Info on DA ±orm 2408-4, which tracks rounds Fred, won’t be
valid. Your howitzer could be unsafe to Fre.
The only way to remedy a mismatched breech block is to order a new one. That
will set your unit back $25,764.
If you do Fnd that you have the wrong breech block, check the other howitzers for
the correct block. If you Fnd it, check the two howitzers’ 2408-4s to see if they have
been Fred with the wrong breech blocks. If both howitzers
have NOT been fred,
you can just switch the breech blocks.
If the howitzers have been Fred or you can’t determine from the 2408-4s if they’ve
been Fred, you will need to order new breech blocks, NSN 1015-01-344-5835. Don’t
Fre either howitzer until you’ve got new breech blocks.
M119A2
Howitzers…
Make Sure Serial Numbers Match
M88A2 Recovery Vehicle…
Don’t Limit the Limit Switches
Don’t disconnect limit switches!
Breech Ring/
Breech
Mechanism
Breech Block
307
Matched
Matched
DA Form 2408-4
whenever your unit receives an
m119a2 howitzer, you
must
make sure
the serial number on the breech block
matches the number on the breech.
I don’t
care if you
were just
completely
overhauled.
your
breech
block
and
breech
don’t
match.
we’ve got
to track
down
the
right
breech
block.
you know, I
knew
something just
wasn’t right.
glad you’re
checking
that out.
this includes
howitzers
coming
from the
left behind
equipment
(lbe) program
and depot
overhaul,
as well as
lateral
transfers
from another
unit and
brand new
m119a2s.
708 10-11.indd
1-2
10/4/11
3:43 PM
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