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M60 - When feed cam return springs go bad...


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#1 mattnh

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Posted 28 August 2019 - 10:03 PM

I thought those here might find it interesting to see a picture of a bad topcover feed cam return spring.

Typically, they do not totally snap - instead, they crack making the return slow/weak - and gun just starts to misfeed...

Notice the very small crack at the top of the 2nd picture.

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Edited by mattnh, 28 August 2019 - 10:13 PM.

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#2 mattnh

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Posted 28 August 2019 - 10:11 PM

Here is a picture of an M60e3 topcover showing where the spring is located under the cam...

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Edited by mattnh, 28 August 2019 - 10:12 PM.

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#3 mattnh

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Posted 29 August 2019 - 06:01 PM

Do any of you guys proactively change feed pawls, topcover pawls, or return springs

of just run 'em until they fail?


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#4 StrangeRanger

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Posted 29 August 2019 - 06:46 PM

Never touched anything in the top cover, never needed to.

 

That statement should jinx my ass but good, I look for it to fall apart at the next shoot.


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#5 mattnh

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Posted 29 August 2019 - 10:56 PM

Never touched anything in the top cover, never needed to.

 

That statement should jinx my ass but good, I look for it to fall apart at the next shoot.

 

OK, sounds like you are in the run it til fails camp...

FWIW, feed pawl, topcover pawl, & return spring are wear items... 


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#6 StrangeRanger

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Posted 30 August 2019 - 08:16 AM

Guess I need to go shopping.  Springs are readily available, pawls not so much although Desert Ord can probably fix me up if I can't find them elsewhere.  Just to clarify, the parts list in TM9-1005-224-29 doesn't show a "top cover pawl."  Are you referring to the pawl in the feed tray or something else?  I just happen to have a complete spare feed tray assy.


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#7 mattnh

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Posted 30 August 2019 - 09:43 AM

Guess I need to go shopping.  Springs are readily available, pawls not so much although Desert Ord can probably fix me up if I can't find them elsewhere.  Just to clarify, the parts list in TM9-1005-224-29 doesn't show a "top cover pawl."  Are you referring to the pawl in the feed tray or something else?  I just happen to have a complete spare feed tray assy.

 

It is the little spring-loaded gizmo with fingers that grabs the belt and advances it.

They are pretty widely avail at the common places...

e.g.

Here is a topcover feed pawl on GB so you know what you are looking for:

https://www.gunbroke.../item/816350660

Aaron has them, too.

 

The other is the feed tray pawl that prevents belt from slipping backwards

also very common

https://www.gunbroke.../item/817486137


Edited by mattnh, 30 August 2019 - 09:46 AM.

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#8 StrangeRanger

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Posted 30 August 2019 - 10:38 AM

The feed tray pawl I've got

The feed cover pawl assembly I should buy along with a spring or two


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#9 mattnh

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Posted 31 August 2019 - 12:29 AM

FWIW, I've never seen the topcover feed pawl spring sold separately


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#10 MG08

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Posted 01 September 2019 - 11:58 AM

I never have had one fail, but do keep a spare in the parts bin.


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