Printer Friendly

M120/M121 mortar ... what's the matter with my mortar?

Lubrication--Of course, you need to follow the lubrication chart on Page 3-4 in TM 9-1015-250-10. But remember when you squirt grease in the crank handles for the traversing, elevation, and cross leveling assemblies, more is not better. If you squirt and squirt grease in the handles, they can become difficult to turn. Give the handles a couple of squirts each and work the handles all the way in and out to spread the grease. Do that weekly.

Test the buffer--If the buffer binds, the mortar jumps more and that can hurt accuracy. Pull down the buffer as far as possible using the two housing tubes as handholds. Let it go. It the buffer doesn't smoothly return to its original position, something is wrong. Tell your armorer.

In the desert, don't lube all the unpainted surfaces of the bipod with GPL, even though Page 3-2 says to. Corrosion is not the problem in the desert, it's sand. Lube will attract sand, which will chew up the bipod's moving parts and seals. Wipe off all lube from the outside of the bipod in the desert.

Fully screw in the firing pin bushing--After you take apart the breech to clean it with dry cleaning solvent, remember to screw in the firing pin like it says on Page 3-27 when you put the breech back together:

Tighten the bushing hand tight. Then put on the mortar's socket wrench and give the wrench handle one hand tap to fully tighten the bushing. If the bushing is loose, it can ride up above the firing pin. Then the round won't ignite.
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.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Small Arms
Publication:PS, the Preventive Maintenance Monthly
Article Type:Brief Article
Geographic Code:1USA
Date:Mar 1, 2005
Previous Article:Missiles, aviation ... how to improve AMCOM TMs.
Next Article:M121 mortar carrier ... mounting the 120mm mortar.

Related Articles
Looking ahead to the infantry mortar of the 1990s; the trend towards larger calibres and smarter munitions.
A survey of the modern mortar.
Mortar ammunition update. (Technology).
Got your warning decals?
M121 mortar carrier ... mounting the 120mm mortar.
Mortars ... firing pin needs to move.
Do pits matter?

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters