PS Magazine - TB 43-PS-627

PS, The Preventative Maintenance Monthly

ISSUE 627

FEBRUARY 2005
PS Magazine - TB 43-PS-627 - Page 5 of 33
C
rewmen, you want the M199 cannon tube on your M198 towed howitzer to last
as long as possible. But in some cases, that’s not happening.
The problem comes when DS performs
a pullover gauge reading. They usually
post “Borescope Serviceable IAW TM 9-
1000-202-14” in the Remarks column of
the DA Form 2408-4 along with the actu-
al pullover reading. Unfortunately, they
often neglect to update the Remaining
Life (EFC RDS) column.
To do that, they’re supposed to use
Table K-2 in TM 9-1000-202-14,
Evaluation of Cannon Tubes.
Based on
the wear reading, the table provides a
new EFC count—usually a pretty big
gain. That means the cannon tube’s life is
extended.
But if the corrected EFC count
isn’t
added to the Remaining Life (EFC RDS) col-
umn, you’ll probably just continue to use the old EFC count. That means the can-
non tube’s life goes down faster than it should.
Things get even more complicated when it’s time to enter the data from the hard
copy 2408-4 into the online electronic version of the form. When the actual wear
reading from the Remarks column is entered, the system
automatically
enters the
corrected EFC count in the Remaining Life (EFC RDS) column.
Now what you have listed in your hard copy 2408-4 and what shows up on the
automated form don’t match. Let the hair pulling commence!
PS 627
FEB 05
6
M198 Towed Howitzer…
For more information
about the electronic
DA Form 2408-4,
check out Pages 8-9 of
PS 620 (Jul 04). it’s
online at:
pub/psissuesA/620
620-08-09.pdf
Until then, you may need
to enter the missing data
yourself to prevent any
problems. Here’s the
chart from Table K-2…
ACTUAL DIA.
WEAR
6.100
6.105
6.110
6.115
6.120
6.125
6.130
6.135
6.140
6.145
6.150
6.155
6.160
6.165
6.170
6.175
6.180
6.185
6.190
6.195
6.200
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
1750
1663
1575
1488
1400
1313
1225
1138
1050
963
875
788
700
613
525
438
350
263
175
88
0
EFC ROUNDS
PERCENTAGE
41.75 INCHES
(Gauge Reading)
BORE MEASUREMENT
EST. REMAINING LIFE*
0
.005
.010
.015
.020
.025
.030
.035
.040
.045
.050
.055
.060
.065
.070
.075
.080
.085
.090
.095
.100**
*Use lowest estimated remaining life obtained with wear
at the 41.75 in location. Enter the “EFC Rounds” value on
the cannon tube’s 2408-4 card in the “Remaining Life
(EFC RDS)” column.
**Condemnation Limit: Condemnation will be based on
tube
wear regardless of rounds fired.
Remaining
Life
(EFC RDS)
h
Remarks: Recoil Exercise
(RE), Gage or Velocity Reading,
Safety Inspection (SI)
i
Remaining
Life
(EFC RDS)
h
Remarks: Recoil Exercise
(RE), Gage or Velocity Reading,
Safety Inspection (SI)
i
No entry next to pullover gauge
reading? Check out Table K-2
the online 2408-4
doesn’t have the
same info that I
just typed from
the hard copy
form!
there’s
nothing
wrong
with the
system.
…after the last
entry for the pull-
over gauge reading.
if
you’ve
run across
this problem, take a
look at table k-2 in tm
9-1000-202-14 to get
the right round count!
hey!
what’s
going on?
An upcoming change to
TM 9-1000- 202-14 will
instruct DS to enter the
corrected EFC count
from Table K-2 after
performing a pullover
gauge reading.
your DS
just
forgot
to write
down the
adjusted
round
count…
627.06-07(C)
12/24/04
2:33 PM
Page 1
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