New Engine Conversion Kit


The M113-series FOV’s heater box-equipped engine, NSN 2815-01-248-7644, is being phased out through attrition. It’s replacement is the glow plug-equipped engine, NSN 2815-01-412-2715.


If you have an M113 that’s due for an engine replacement, order the new version. Keep in mind that you’ll need the glow-plug conversion kit, NSN 2815-01-653-9437. The kit upgrades the electrical system so it can accept the new engine.


You’ll find the instructions for installing the conversion kit in TM 9-2350-277-13&P in IETM EM 0321 (Oct 14).

Questions? Contact Christopher Faiola at DSN 786-8291, (586) 282-8291, or email:

or Floyd Perry at DSN 786-8290, (586) 282-8290, or email:

or Richard Darling DSN 786-2517, (586) 282-2517, or email:


GCSS-Army Turn-in Credit      

GCSS-Army has its own set of document numbers. Once the customer is issued a glow plug-equipped engine, NSN 2815-01-412-2715, a ZRL (return delivery to SSA) purchase request document is created. The ZRL document number is eligible for credit for 180 days.

The customer then turns in the heater box-equipped engine, NSN 2815-01-248-7644, with a ZXS (excess requisition) document since the return has no corresponding issue. The ZXS document will be assigned a return advice code (RAC) of 1W.

The SSA will need to manually match the -7644 return receipt against the -2717 issue document and manually remove the RAC to allow the system to generate credit. The SSA will also need to manually close the ZRL document so that it doesn’t match to another turn-in receipt.

Note: The issue and return MILSTRIP document numbers will be different.


Stop Needless Battery Replacement

Operators, it’s no secret that M400W compact-skid loaders have an ongoing problem with battery drain.

Most of these vehicles use the yellow-top Optima batteries. Even though they’re high quality batteries, they can’t stand the constant drain by the loader’s electrical system. The constant discharge leads to sulfated plates. Over time, the Optima battery can no longer be charged and has to be replaced. The end result is way too many dead batteries in these skid loaders. And the cycle continues.

Here are four ways to stop needless battery replacement:

o Start the skid loader weekly and run it for an hour.

o Every other week, plug a charger into the vehicle’s NATO receptacle and fully charge the battery set. The ProHD, NSN 6130-01-500-3401, is an approved charger that comes with the SATS.

o For long-term storage, make sure you disconnect the skid steer loader’s batteries.

o For skid loaders stored outdoors in the motor pool, use a solar charging system, like the Solar Pulse Monitor System, NSN 6130-01-558-5371. It simply plugs into the NATO receptacle and no modifications are needed.

Are You Flying with the Right Radio?

Pilots, having the right radio in your Lakota rotorcraft is the difference between communicating and not communicating.

The bad news is that some RT-5000 radios meant for Kiowa OH-58A/C models have been installed on the Lakota UH-72A models. The wrong radio sets were moved into unit avionic stocks and used in Lakotas as line replaceable units (LRUs).


Both airframes use RT-5000, remote-mount, multi-band AM/FM transceiver radios. The version used for OH-58A/C Kiowas does not allow for digital transmission and reception of the same frequency signals like the RT-5000 approved for the Lakota.

If your UH-72A’s radio isn’t operating properly, eyeball the part number (PN) and cross check that PN against the proper supplemental type certificate (STC) for the correct Mission Equipment Package (MEP) of the rotorcraft.

Lakotas operating in a security and support (S&S) MEP, need the RT-5000s with PN 400-105525-6011 for comm #4, and PN 400-105525-6111 for comm #5. For Lakotas in a non-S&S MEP configuration, the RT-5000 radio should be PN 400-015525-5111 operating in comm #4.

If you find an unauthorized radio in your Lakota, make the following entry in the aircraft logbook:


“RT-5000 (PN 400-015525-xxxx*) required removal and replacement per aircraft’s STC with correct RT-5000 (PN 400-015525-xxxx*)”

*Ensure the PN(s) reflect the RT-5000 to be removed and the correct PN(s) for the MEP version that is going to be installed.

Got questions about the RT-5000 radio? Contact Keith Stilwell, DSN 645-0797, (256) 955-0797 or email:

Stocking Bench Stock

Keeping stock of shop and bench stock can be a real pain in the rear for mechanics responsible for a wide variety of Army equipment.

Wherever maintenance take place, bench stock should be available for use in each location. Bench stock is 30 days of supply (DOS) and is low cost, high use, consumable Class II, III (packaged), IV and IX (less components) items used by maintenance personnel at an unpredictable rate.

All the details are in AR 710-2, Supply Policy Below National Level (Mar 08). Check out Para 2-23 for shop stock and Para 2-24 for bench stock.

Bench stock consists of common hardware like resistors, wire, tubing, rope, welding rods, sandpaper, gasket material, sheet metal, seals, oils, grease, repair kits and more. Always make sure you get semiannual approval for a shop and bench stock list from your maintenance officer.

When you’ve got a lot of bench stock, you’ll need somewhere to keep it. For a few dollars, your unit can order a small parts storage box, NSN 8115-00-663-0212 or two transport and storage cases, NSN 8115-00-663-0213. The first case has 64 plastic drawers that are 3x3x5 inches each. The second case has 24 plastic drawers. Sixteen are 6x2x5 inches. The remaining eight of them are 6x4x5 inches. All the drawers come with dividers and a slot for inserting a label.

Rubber Boot Cracks Don’t Deadline

ms-7488-m-fig-1Some units are deadlining the M1235A4/A5 MaxxPro Dash ISS MRAP during checks and services. Why? Because they see cracks in the rubber boot cover on the steering gear output shaft that connects to the pitman arm.

Step 3 of Items 15 and 106 in the PMCS tables of TM 9-2355-441-10 says to check the pitman arms for cracks and bends. If the pitman arm is cracked or bent, the vehicle is deadlined.

But this is a case of mistaken identity! This particular check is referring to the pitman arm itself, not the output shaft’s rubber boot.

Cracks or tears in the output shaft boot do not deadline your vehicle. Cracks there have no bearing on the form, fit or function of the pitman arm. The pitman arm has an internal seal to protect it.

For more info, check out TACOM Maintenance Information message 16-046:

M2A1 Barrel Questions Got You Over a Barrel?

The bracket for Item 11 in WP 0038 00-2 of the M2A1 machine gun’s TM 9-1005-347-23&P shows the barrel assembly, NSN 1005-01-541-2478, to include the barrel, flash suppressor, barrel cap and carrying handle. But when you order that NSN, you receive only the barrel with the flash suppressor installed.
The bracket for Item 11 in WP 0038 00-2 does confuse things and will be removed in the next revision to the TM.
When you order NSN 1005-01-541-2478, you’ll receive only the barrel and the installed flash suppressor.
The barrel carrying handle (Item 12), NSN 1005-01-539-3410, is BII and should not be turned in with a damaged barrel.
The barrel cap (Item 14A), NSN 5340-01-545-2949, is BII for the BFA, which is covered by TM 9-1005-314-13&P. It also should be kept and not turned in with a damaged barrel.
The barrel cap can be used in place of the flash suppressor during live fire training. When the BFA is going to be used, the barrel cap should be installed like it says in the BFA TM. Remember there is also a barrel protective cap, NSN 5340-01-552-0082, which protects the barrel breech threads. Don’t mix up the caps.

Watch Out for Bulging Tubes

Watch Out for Bulging Tubes

Crewmen, it’s bad enough when explosive ordnance disposal (EOD) has to remove a stuck round from your 155mm howitzer. It’s a lot worse if you’re left with a bulging cannon tube!
That’s what could happen to your howitzer if EOD uses the water blast method to remove a stuck round.   The 155mm cannon tubes most at risk are the M7776 and M284 steel and M7776 and M284A2 chrome barrels.

If EOD uses the water blast method to extract a stuck round from your howitzer, inspect the cannon tube with a borescope. A bulge means the tube has to be condemned. If you suspect a bulge but can’t see one, use a pullover gage to measure the area where you suspect damage.
You’ll find the full scoop on inspecting for damage in TM 9-1000-202-14, Evaluation of Cannon Tubes. Appendix T covers the M7776 tube and Appendix U covers the M284 tube. EM 0065, which covers most small arms, has the TM, as does LOGSA’s ETM website:

Be sure to immediately notify your logistics assistance representative (LAR) or field service representative (FSR) if EOD removes a stuck round from your howitzer.
You are also required to report EOD round removal and any damage on DA Form 2408-4, Weapons Record Data Card, in the remarks column. You can access it at: