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New tracks for an old warrior.

There's a new track available for your M113-series vehicles, crewmen. T150F is a double-pin track that lasts longer and performs better than the old T130E1 single-pin track you're used to.

TB 9-2530-369-20-1, Modification to Convert M113A3 FOV Carriers, M113A2 FOV Carriers, M548A1/A3 Carriers and OSV/MBT Vehicles TI30E1 Track to T150F Track, will soon be published to provide guidance on the conversion process.

Each new track shoe comes with NSN 2530-01-496-4444. It takes 63 track shoes for the left side and 64 for the right side of M113 FOVs. The M548 takes 66 track shoes for each side.

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.

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.
 Item NSN/PN Qty in kit

Sprocket wheel 3020-01-496-4445 4
Mounting plate 5340-01-497-7433 4
Rubber sprocket cushion 2520-00-679-9657 4
Mounting bracket 5340-01-497-5173 4
Flat washer, 2-in dia 5310-01-497-2285 4
Flat washer, 1-in dia 5310-00-809-5998 8 *
Screw, 1.25-in long 5305-00-071-2067 4 *
Screw, 1.5-in long 5305-00-071-2069 4 *
Bolt, 1.25-in long 5306-01-132-3363 20
Bolt, 3-in long 5305-01-496-6745 40
Track pin alignment gauge 5220-01-504-2610 2
Track wear gauge 5220-01-496-3692 1
End connector puller 5120-01-496-3689 1
Wrench 55719-IM-362 1
Wrench handle 45225-H-377 1
Handle extension 55719-36A 1

* NSN brings 100 each. The kit comes with the quantity listed.
COPYRIGHT 2005 PS Magazine
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2005, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:M113-Series FOV ...
Publication:PS, the Preventive Maintenance Monthly
Date:May 1, 2005
Words:423
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