Bushmaster M242 25mm Chain Gun - Maint w/Pics

[1feral1]

Here is some M242 pics.

Janes can tell you more, but thought I'd post these.....

1. Type 1 ASLAV

2. and 3. M242 Feeder.

 

[1feral1]

4. Reciever and barrel

5. Buffer after rebuild

6. Barrel extention w/ recoil mech

 

[1feral1]

7. and 8. recoil mech lock wired in.....

9. Reciever

 

[1feral1]

10. BPI

11. Underside of reciever

12. Same but stripped

 

[1feral1]

13. reciever guts

14. reciever guts re-assembled....

15. muzzle/business end.....

More to fol once I get the beast back together.....

Meanwhile, do enjoy, as I am sure many of you got the TI on this gun also.

OWDU

 

[dangerboy]

Wes

Nice pictures

Do you have a problem with lost bridge plates, we did a mod installing a chain to permanently attach them to the feeder.  We had a lot being lost
in the bottom of the turret.

 

[1feral1]

Yes, and they're not cheap, but none are attached permanantly....

More pics today....

I must try and rack out, rev is at 0500, and its just 0200 now. TGIF!

I hate these sleepless nights!

Cheers,

Wes

 

[1feral1]

I would be interested to know what type of grease is used in the colder climates, here its XG276 for the tropics. I would imagine the 276's viscosity would be like rubber in the cold, and therefore not effective.

Cheers,

Wes

 

[dangerboy]

I would be interested to know what type of grease is used in the colder climates, here its XG276 for the tropics. I would imagine the 276's viscosity would be like rubber in the cold, and therefore not effective.

Cheers,

Wes

We use Grease, molybdenum disulfide (81349)
MIL-G-21164
NSN 9150-00-754-2595

If that tells you any info or not.

 

[1feral1]

I'll have a squizz at that, and see what compatable stuff we have. On our guns, the 276 is used generously. Its dark grey and also moly.

I would also be interested in what level of maintenance is done at the Unit level. Is the gun stripped right out annually? Here we peel it down pretty mcuh to nothing, including lockwire etc. even the bbl ext is removed from the reciever. total service if things go good is about 8 hrs labour. If the gun has issues (and sometimes they do) it can be longer.

Cheers,

Wes

 

[karl28]

Overwatch Downunder

                  Thanks for posting those pics I thought there where really good . Gives us Civies a chance to see something that we normally wouldn't .

 

[dapaterson]

But can you use it to hunt womp rats from a T-16?

 

[1feral1]

Overwatch Downunder

                  Thanks for posting those pics I thought there where really good . Gives us Civies a chance to see something that we normally wouldn't .

No worries Karl. Janes can tell you much more and have better pics/info.

Cheers,

Wes

 

[1feral1]

Here's why they call it a chain gun  :nod:

Bolt and track.

Note the similarities to other smaller weapons systems WRT cam and rotation. 

 

[1feral1]

With feeder on the reciever, and bbl attached.

This beast is missing the feed select cable.

Cheers,

OWDU

 

[DirtyDog]

I'll have a squizz at that, and see what compatable stuff we have. On our guns, the 276 is used generously. Its dark grey and also moly.

I would also be interested in what level of maintenance is done at the Unit level. Is the gun stripped right out annually? Here we peel it down pretty mcuh to nothing, including lockwire etc. even the bbl ext is removed from the reciever. total service if things go good is about 8 hrs labour. If the gun has issues (and sometimes they do) it can be longer.

Cheers,

Wes

While I'm not a weapon's tech, with the tempo our LAV fleet is running at right now, being shipped from unit to unit, I doubt the guns have been getting much thorough routine maintenance. 

 

[1feral1]

Really?

Here there is a detailed log book, which accompanies the vehicle, and carries all the information and history for the life of the gun, including annual tech inspections, repairs and prefires.

There is also an electronic report which expires anually, and if it expires the gun is grounded.

Here the gun has critically lifed components, such as firing pin (condemn at 12,000 rds), and other certain parts of the gun when exceeded 25,000 rds. This is all tracked, and a right royal pain too.

A major part of the annual inspection is the bore, where at Unit level, a BG20 (an English thing) electronic measuring device is used at various lengths (16 positions), and so recorded, as there is warning and failure limits.

Cheers,

Wes

 

[karl28]

Overwatch Downunder

        Thanks for the pics on the chain part never realized there an actual chain in the weapon system as to why its called a chain gun .  Looks really complicated to do the work I think I will stick to my PSW job in the nursing home that I work in  .

Karl