PS Magazine - TB 43-PS-630

PS, The Preventative Maintenance Monthly

ISSUE 630

MAY 2005
PS Magazine - TB 43-PS-630 - Page 4 of 33
what?
M113A2/A3 FOV…
PS 630
MAY 05
5
The belly
armor can be
removed and
stored
depending on
the tactical
situation.
Once installed,
the sponson
armor should
remain on the
vehicle
permanently.
PS 630
MAY 05
4
After the Conversion
If your vehicle has already been converted to the new track, you may have already
noticed a problem. The roadwheel lifter (dog bone), NSN 5120-01-062-5607, that’s
part of the organizational maintenance tool set, doesn’t work with T150F track. That
makes it hard to replace roadwheels.
Order wheel lifter, NSN 5120-01-
496-3694, as a replacement for the old
dog bone. Until it arrives, mechanics
can use the 8-ton hydraulic hand jack,
NSN 5120-00-595-8396, to raise the
roadwheel arm.
Position the jack on the track below
the roadwheel arm. Make sure the
jack is centered on the arm spindle.
You might want to use a piece of
wood between the jack and roadwheel
arm to help center the jack and protect
the arm spindle.
Raise the roadwheel arm high enough to keep it from hitting the
center guides when removing the roadwheel.
Use wheel lifter, NSN 5120-01-496-3694,
on vehicles with T150F track
Correct Sprocket Carrier Needed
Before you convert your vehicle to the new T150F track, make sure you’ve got
the correct sprocket carrier.
Some vehicles still have the old-style sprocket carrier, NSN 2520-00-679-7960.
The old sprocket carrier will not allow the 3-in mounting bolts to tighten all the way.
The added length of the 3-in bolts is needed because of the additional weight and
stress of the T150F track.
So check those sprocket carriers before converting to T150F track and replace
them with NSN 2520-00-678-8382 if necessary.
Old-style sprocket carriers, NSN 2520-00-679-
7960, are too thin for 3-in mounting bolts
New sprocket carriers, NSN 2520-00-678-
8382, have bosses that make them thicker
N
eed some additional protection from mines and small arms fire on your
M113A2/A3? Then the mine armor kit, NSN 2540-01-498-9827, is for you.
The kit consists of a 3/4-in thick belly plate and a 3/8-in thick plate for attaching
under the driver’s side sponson.
The M113A3 has pre-drilled mounting holes for the belly armor, but not for the
sponson armor. You’ll need to have holes drilled and tapped and mounting inserts
installed before it can be mounted. You’ll find the inserts listed in Fig 230 of TM 9-
2350-277-24P.
The belly and sponson armor also works with all other A3 variants and all A2s,
but mounting inserts have to be installed before either plate can be mounted on those
vehicles. Instructions come with the kit.
Be forewarned that when belly plates are mounted on A2 models, they obstruct
the access plate on the bottom of the hull. That means you’ll have to remove the
belly plate in order to service the filters.
y’know, this carrier
really needs some
extra armor
before
we deploy!
hmm…
connie!
I’ve up-
armored,
too!!
I know what
we need!
630.04-05(C)
3/28/05
7:42 PM
Page 1
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