Ammo Handling

29 Pages·2013·5.8 MB·English

Issue 602 TB 43-PS-602
Approved for
Public Release;
Distribution is
Unlimited
January
2003
Ammo Handling
part 3 (of 3) • see page 48
How Official is PS?
TB 43-PS-602, The Preventive Maintenance Monthly, is an official pub-
lication of the Department of the Army, providing information for all
soldiers assigned to combat and combat support units and all soldiers
here’s that but, gee, Yeah. with unit maintenance and supply duties. All information published has
new procedure maybe we Then it’ll bmeeennt ,r epvuibewliceadti oann do ra ppporliocvye ddi sbcuy stsheed .a Agepnpcliyc arteisopno onfs ibthlee finofro trhmea etiqouni pis-
on touching up should wait be official. optional with the user. Masculine pronouns may refer to both genders.
bare spots on until it gets in
ISSUE602 JANUARY2003
machine gun the tm before
mounts. we do it.
WHEELED VEHICLES 2 COMBATENGINEERING 21
Use of Ether on Construction Equipment 21
New Towing Restrictions 2-3
hold Fuel Tanker Grounding 4-5 MK2 Bridge Boat Cold Weather PM 22-23
it!! FMTV Back-up Hydraulic Pump 5 MK2 Bridge Boat Instrument Panel 23
M978 HEMTT Tanker Fuel Transfer Hose 6
HEMTT Gear Stowage 7 SOLDIER SUPPORT 24
COMBATVEHICLES 8 Improved Camouflage System 24-25
New Heater for the 4-man Crew Tent 26
M1A1/A2 Tank Gun Mount Seals 8
M2/M3-Series Bradleys, MLRS Track Pins 9 AVIATION 35
AVLB Doghouse Cover 10
M992A2 Ammo Carrier Starter Relay 11 AAFARS Filter Separator Element 35
Aviation Ground Power Unit PM 36-39
MISSILES 12 UH-60 Tail Landing Gear Yoke Tool 40-41
Patriot Missile System ECS Tips 12-13 COMMUNICATIONS 42
S
don’t wait! ome units misunderstand this statement on the PS SMALLARMS 14 PP-8444A/U Battery Charger 42
if the info is in table of contents page: "Application of the informa- AN/PSG-9(V)1 & 2 Display Screens 43
PS, it’s official M2 Machine Gun Headspacing & Timing 14-19 Rechargeable Battery Adapters 44
tion is optional with the user." They think because
as far as you’re AN/MJQ-37, -38 Power Plant Stud NSNs 45
concerned! what they see in PS is "optional" they can ignore it. NBC 20 SINCGARS AS-3900 Antenna PM 46-47
That's a mistake! Preventive maintenance informa- NBC on the Internet 20
AMMO HANDLING 48-60
tion gets into PS only after a difficult journey through
commodity commands where the information has
been reviewed by the equipment experts. If they don't
approve an article's information, the article doesn't
make it in the magazine.
So everything you read in PS has been blessed by
the command who manages that piece of equipment.
You are invited to send PSyour ideas for improving mainte-
The information in PS is "official" in the sense that it's
nance procedures, questions on maintenance and supply
By order of the Secretary of the Army:
officially approved. PS articles often correct or clear problems and questions or comments on material published ERIC K. SHINSEKI
in PS.
up information in TMs,ARs,or FMs. The information Just write to: General, United States Army Chief of Staff
appears first in PS because PS usually can get it to the MSG Half-Mast Official:
PS, the Preventive Maintenance Monthly
field faster. USAMC LOGSA (AMXLS-AM)
5307 Sparkman Circle
You shouldn't wait until the info makes it into the Redstone Arsenal, AL 35898-5000 JOEL B. HUDSON
Or e-mail to: Administrative Assistant to the Secretary of the Army
"official" publication before you act upon it. That may [email protected] 0232401
Internet address:
be too late. http://www.logsa.army.mil/psmag/pshome.html
The option not to follow the instructions in PS lies
PS, The Preventive Maintenance Monthly(ISSN 0475-2953) is published monthly by the Department of the Army, Redstone
with your commander. Unless he or she says other- Arsenal, AL 35898-5000. Periodical postage is paid at the Huntsville, AL post office and at additional mailing offices.
Postmaster:Send address changes to PS, The Preventive Maintenance Monthly, USAMC LOGSA (AMXLS-AM), 5307 Sparkman Circle,
wise,use the info. Your equipment will appreciate it. Redstone Arsenal, AL 35898-5000.
TToowwiinngg CChhaannggeess ffoorr SSEECCMM aanndd EEOODD
there have
been some
towing If you drive a truck so, get
changes carrying either the Secm out your
for both (shop equipment, contact tms and
of us! maintenance) or eOD grab a
(explosive ordnance pencil!
disposal) body, make a
note of these towing
restriction changes…
SECM EOD
The warning at the bottom of Page C in Change 1 to the SECM's TM 9-4940-563- The warning at the bottom of the warning summary at the front of TM 9-4940-
13&P (Jan 98) should read:"All SECMs are capable of towing either the M116- 566-23&P (Nov 99) should read: "All EODs are capable of towing either the
or M101-series trailers. The maximum trailer load capacity is an evenly dis- M116 or M101 series trailers. The maximum towed load capacity is an evenly
tributed 4,200 pounds with a tongue weight not to exceed 420 pounds. NOTE: distributed 4,200 pounds with a tongue weight not to exceed 420 pounds.
MWOs 9-2330-392-35-1 and 9-2330-392-20-1 must be applied to the trailer and NOTE:Prior to towing trailers,MWOs 9-2330-392-35-1 and 9-2330-392-20-1
MWO 9-2320-288-20-6 must be applied to the vehicle chassis." must be applied to the trailer and MWO 9-2320-288-20-6 must be applied to
the vehicle chassis."
Para 1-7.b (3),Page 1-7 in Change 2 to the TM should read:
"(3) Limitations. The SECM is limited by Para b.(3), Page 0002 00-1 in Change 1 to the TM should read: "Limitations.
capacity from performing Depot Level Fording capability is limited to hard bottom surfaces not deeper than 30 inch-
Maintenance tasks on equipment in need of es (76.2 cm). All EODs are capable of towing either the M116- or M101-series
repair. Fording capability is limited to hard trailers. The maximum towed load capacity is an evenly distributed 4,200
bottom surfaces not deeper than 30 inches pounds with a tongue weight not to exceed 420 pounds. Note:Prior to towing
(76.2 cm). All SECMs are capable of towing trailers, MWOs 9-2330-392-35-1 and 9-2330-392-20-1 must be applied to the
either the M116 or M101-series trailers. trailer and MWO 9-2320-288-20-6 must be applied to the vehicle chassis."
The maximum trailer load is an evenly dis- If you're not sure if these MWOs have been applied,check for the MWO identi-
tributed 4,200 pounds with a tongue weight fication plate on the trailer/chassis.
NOT to exceed 420 pounds. NOTE: Prior If you have questions about these changes,contact TACOM-RI's Tom Littlefield
to towing trailers, MWOs 9-2330-392-35-1 at [phone]/DSN 793-1913 or e-mail
and 9-2330-392-20-1 must be applied to the [email protected]
trailer and MWO 9-2320-288-20-6 must be
applied to the vehicle chassis." PS 602 3 JAN03
Fuel Tankers…
Grounding
Grounding is hooking up a vehi-
cle to a ground rod so that static will Ground tanker
flow into the earth. You can drive a
rod into the ground and connect a
Grounding!
ground strap from the vehicle to it,
It’s bonding
and grounding. or you can hook the strap onto a
water pipe or other grounded metal.
I knewthere That should keep a spark from
was something I turning into an explosion or fire.
was forgetting…
For more on grounding,see your
vehicle operator’s TM and FM 10-
67-1, Concepts and Equipment of
Petroleum Operations.
FMTVs…
Back-Up Hydraulic Pump
M
ore than one eyebrow will hit the hairline if a spark occurs during a fuel-loading
or refueling operation.
exercising
Where does that spark come from? Static electricity. what
the pump! it
are you
This is the same kind of electricity you feel when you walk on a carpet and reach lubricates
doing?!
for a metal object or touch another person. the seals!
Static electricity also comes from the friction of fuel flowing through a hose or
fuel falling through the air. As the static charge builds,it tries to jump across any
gap separating it from other parts of the system.
If there are fuel vapors in the gap when a spark flashes across—KA-BLAM—
that’s all she wrote!!
You can’t prevent static,but you can prevent it from arcing or sparking with bond-
ing and grounding.
Set a Bonding Path
Bonding is connecting
a wire from your tanker Bond to W
ater,ice and snow play havoc with your FMTV’s back-up hydraulic pump. These
to the vehicle you’re bare metal
going to refuel. It equal- on vehicles elements cause the pump’s cylinder rod to rust. Rust tears the pump’s seals,causing
to equalize ‘em to leak. Enough rust and corrosion cause the pump to stay stuck—that’s not
izes any static electricity
static and good when you need to use it.
on the vehicles. You can
prevent All FMTVs have the manually operated back-up hydraulic pump. If the powered
also bond vehicles by
sparks
hydraulic system fails,this pump provides the hydraulic pressure needed to use the
grounding each to the
cab tilt,suspension compression and spare tire lowering and raising mechanism.
same ground point.
So do the hydraulic pump a favor. Exercise it every month. Exercising the pump
PS 602 4 JAN03
keeps its seals lubricated.
M978 HEMTT Tanker… HEMTTs…
Cool It on Gear Stowage
Repair, Don’t Replace Hose
what’s these
that? things are
costing us
another
a fortune!
new fuel
transfer
hose.
we’d still be on
the road if you’d
found somewhere
else to store
your gear!
here’s an
idea… why
don’t you
repair my
old hose
instead?
Dear Editor,
The fuel transfer hose on our M978 HEMTT always seems to wear out
fastest where it connects to the fuel nozzle. That’s where most of the bend-
ing and flexing takes place.
Most units I’ve seen replace the entire hose assembly when that happens.
That costs more than $340.
Instead of ordering a brand I
new hose, we remove the fitting, Cut off damaged section n order to cool your HEMTT’s engine,the radiator needs cool air. That’s not gonna
cut off the 3 or 4 inches of and reattach to nozzle happen if you pile your gear on top of the cab.
damaged hose and reattach it Camo nets, backpacks, Gear on cab
to the nozzle. Since the blocks air flow
duffle bags and other gear
repaired hose is only a few
inches shorter, we can do this tied down on top of the cab
several times without affecting will block the air flow chan-
the mission. The money we save nel that funnels air to the
can be better used for more
radiator. No air, no cooling.
critical maintenance items.
And soon,no engine.
Motor Pool
Sure, space is tight. But
588th DSU
Ft Sill, OK you’re better off finding
somewhere else to put that
From the desk You’ve given us some fuel for thought! Check out
of the Editor the fabrication instructions on Page F-16 of TM gear. It beats thumbing a ride
9-2320-279-20-3 for reattaching the hose. when the engine overheats.
PS 602 6 JAN03 PS 602 7 JAN 03
M1A1/A2 Tanks… M2/M3-Series Bradleys, MLRS…
KEEP NUTS IN THEIR PLACE
wait!you may
got another only need to
leaky gun replace the front
mount seal great! seal and wiper!
to replace! there goes
another
$1,000!
I’m g-going
to sh-shake
apart if they
d-don’t check
muh-my track
pin nuts!
C
N rewmen,nothing messes up your day like
ormal use and regular exercise of a tank’s main gun will ensure the gun mount
a broken track on your Bradley or MLRS. Two or more threads
seals stay flexible and lubricated, mechanics. Even so, a leak could eventually
So it pays to do your part in making sure that showing?Nut is tight
develop.
doesn’t happen—like keeping a close eye on
When that happens,you may think you have to install a new seal kit,NSN 1090-
the track pin nuts.
01-259-9112. Not only does the kit cost more than $1,000, but you have to com-
Eyeball the nuts after each operation. If
pletely disassemble the gun mount to install it.
there are two or more threads showing past
Before you do that,take a close look at the leak’s location. If the leak is coming
the front edge of the nut,it’s good to go. One
from the front seal only,you can replace just the front seal,NSN 1015-01-284-8303,
thread or less means the nut’s loose and your
and wiper,NSN 5330-01-176-8751.
track is at risk.
Those two parts cost about $65 and can be replaced without disassembling the
Check for off-center track pin nuts. Worn
gun mount.
bushings result in off-center nuts, which
‘Course,if the rear seal is leaking,you’ll still need to order the kit and replace make it next to impossible to keep track ten- Report off-center
both the front and rear seals. nuts like this one
sion set right.
M1 Idler Arm Seal Mark loose or off-center nuts and report
‘em to your mechanic. He’ll replace loose
M nuts, NSN 5310-01-140-4555, and torque
echanics,don’t replace the idler arm seal on M1/IPM1 tanks with NSN 5330-
them to 299-325 lb-ft. Don’t let him
00-978-7353. Too many of those seals have developed leaks. Order a stronger seal
retorque them,though. The nuts won’t hold
with NSN 5330-01-478-2379. Pencil in the change to Item 24 in Fig 240 of TM
a second time.
9-2350-255-24P-1.
PS 602 8 JAN03 PS 602 9 JAN03
AVLB… M992A2 Ammo Carrier…
It’s already
running! You’ll
burn up the
starter!!
oh, man!
I’m in the
doghouse It’s not
whaddaya mean what if my again! me! It’s
you didn’t have ptoshaft engaging
time to install breaks on its
my doghouse loose?? own!
cover!?
C
ould be that the problem isn’t the starter at all, but the ammo carrier’s starter
relay,NSN 5945-01-291-0734.
Depending on the age of the starting system,the current draw can be greater than
what the starter relay can handle. Too much current fuses the relay’s contacts
together.
When that happens,the carrier may not start and the starter may engage by itself
D
o you have a doghouse cover over the PTO shaft in your AVLB? If not—and the while the carrier is already running. Mechanics may also get a surprise if they try
shaft breaks loose—youcould be in another kind of doghouse. to replace the starter. When the last wiring harness is connected, the starter may
Sure, installing the doghouse engage even if the starter switch is off and the master power is off.
cover is a hassle. Space is limited and Doghouse cover
If your 1.Disconnect the wiring
you’re probably thinking the cover protects against carrier has harness,NSN 6150-01-
doesn’t do much good anyway. But loose PTOshaft any of these
383-4031,from the
symptoms, have
you’ll regret not installing the cover
your mechanic starter relay.
if the shaft ever breaks loose. check the 2.Using a multimeter,
If that happens,pieces of the PTO starter relay
for fused place the red lead on pin
shaft can go flying. The only thing
contacts. E and the black lead on
protecting you is the doghouse cover. Here’s how…
pin B.
So replace a missing cover with NSN
3.If the multimeter
Put red
5420-00-363-3931.
shows continuity,the probe in
Once you have the cover in place,
starter relay contacts are pin E…
don’t use it as a place to store duffle
fused. Replace the relay.
bags,ruck sacks or other items.
…and
Make a note of
Straps can work down past the lip this test until the black
of the doghouse cover and wrap troubleshooting probe
around the PTO shaft. If that doesn’t Straps can slip past lip procedures in TM in pin B
9-2350-293-20-1
break the shaft, the intense heat can of doghouse cover
are updated.
catch the material on fire.
PS 602 10 JAN03 11 JAN03
Patriot Missile System…
The bay doors inside the
ECS (and Information and Turn handle
Coordination Centeral and to see which
Communications Relay way latch
Group) actually have two turns
different latches: one
turns to the right and the
Here are some
other to the left. If you
good ideas
for your ECS, order the wrong latch, you
patrioteers! waste time and $500.
To tell which latch you
need, simply turn the han-
dle and see which direction Check all 12
the latch turns as you face tiedown
the outside of the door. If boltsbefore
it turns to the right, it's a travel
right-hand latch (Item 3,
Fig 12, TM 9-1430-
1600-24P) and comes
with NSN 5340-01-
254-1600. The left-hand
latch (Item 2, Fig 12)
comes with NSN 5340-
01-254-1601. The latch-
es latch better if you lube
them monthly with WD-40
or some other light oil.
Otherwise, they will stick.
Dear Editor, Before travel, check all
We have several tips for Patriot crews that will make things easier for the 12 cargo tiedown bolts on
engagement control system (ECS): the ECS/ICC/CRG trucks.
Keep two sets of inlet and out- The bolts often break from
let filters on hand for the ECS and Keep an extra set of filters on jolts on the highway.
change them monthly (weekly in the hand and rotate them monthly Broken bolts let the van Change inlet
desert). When you have time, clean shake during travel and fan setting if
the dirty filters with an air hose. If expensive equipment can you get air
they're really dirty, wash the filters be damaged.
flow fault
and let them air dry. If you get an air flow
By rotating and cleaning the fil- fault, try changing the air
ters, you keep clean air going to all inlet fans' settings from
the sophisticated electronic gear SUMMER to WINTER or
inside the ECS. But you also get vice versa and see if that
more life out of the filters because clears the fault. If it does,
you give yourself time to clean the switch back to the original
used ones instead of just replac- fan settings and continue
ing them with new filters. to operate.
The storage device for the tactical storage system (TSS) is cold sensi- SPC Christian Armstrong
tive. If it sits in the cold all night, it won't work well until the ECS has warmed SSG Ramon Cummings
up. When you're not operating and it's cold, store the storage device inside CW2 Charles Woody From the desk of the Editor
where it's warm. D Co, 5/7 ADA
You have indeed made it easier
PS 602 12 JAN03 Babenhausen, Germany
for ECS crews. Good job.
M2 Machine Gun…
Barrel locking spring. If the Barrel and barrel extension
spring can't hold the barrel in place,the threads. If the threads are chipped or
barrel can turn during firing and head- burred, it will be difficult to screw in
If you don't use space is lost. So test the spring by get- the barrel. What's worse,you may think
your head and take ting the correct headspace and then try- you've completely screwed in the bar-
the time when it
ing to unscrew the barrel. If the barrel rel, but you haven't. Result: bad head-
comes to headspacing
and timing your m2 turns,the spring is weak or loose. Tell space. Your armorer can usually stone
machine gun, a round your armorer. The spring must be chips and burrs smooth.
could go off that's
replaced. Burred or
not chambered. Locking spring loose,
chipped
weak or broken?
threads?
That damages the
gun and maybe you
and gets you in hot
water with your C.O.
That's why every
time before you fire
or after you change
the barrel you must
headspace and
How to Headspace
time your m2.
Here's how:…
1.Raise the cover 2.Pull the charging handle back until the
completely. barrel-locking spring lug is aligned with
Pre-check Checks the3⁄-in hole on the receiver's right side.
8
If your M2's in bad shape now,you won't be able to headspace and time it later. To keep the bolt back,insert the small loop
So before you go to the field,do these checks: of an M2 ammo link between the trunnion
block and barrel extension.
Gauges. If the headspace and timing Timing nut. If the timing nut can
gauges are bent, rusted or pitted, you be easily moved with one finger or it
can't accurately gauge, so get good doesn't click as you move it,its spring
gauges from your armorer. He can is weak and it won't hold timing. Tell
order new gauges with NSN 5220-00- your armorer. The spring must be
535-1217. replaced. Hole
Gauges bent, Test timing nut spring
rusted, pitted?
Lug
3.Screw the barrel
all the way into the
barrel extension.
PS 602 14 JAN03
4.Unscrew the barrel two clicks, 8.Keep the charging handle back Headspace Too Tight
remove the link and let the bolt go to maintain the 1⁄ -in separation.
16
forward. If the GO
To see if the barrel is locked with end won't fit,
headspace is
the bolt in the forward position,try
too tight. Do
to turn the barrel in either direction. this…
If it turns,something's wrong. Don't
try to fire. Tell your armorer.
5.Pull the charging handle back to Raise the extractor and try to insert
cock the weapon. the GO gauge all the way up to the
1.Pull back the charging handle 4.Pull back on the charging handle
ring in the T-slot between the bolt
until the barrel-locking spring lug until the barrel extension and trun-
face and rear of the barrel.
is centered in the 3⁄-in hole. nion block are about 1⁄ inch apart.
If the GO end goes down the T-slot 8 16
to the center ring and the NO GO
won't go in,headspace is OK.
GO
6.Ease the bolt forward.
7.Pull the charging handle back until
Lug
Hole
the barrel extension and trunnion
block are no more than 1⁄ inch apart.
16
NOGO 5.Insert the GO gauge again.
2.Unscrew the barrel one click.
so what 3.Ease the bolt forward.
do you do if
headspace
is bad? If the GO end fits and the NO GO end doesn't,the headspace is OK. If the GO
read on…
end still won't fit,repeat these last five steps until it does.
Do not unscrew the barrel more than five clicks beyond the first two clicks in
steps 1-5. If you have to turn the barrel more than seven clicks,something's wrong.
Tell your armorer.
JAN03 PS 602 17