[Tutorial] TM M870 Gas Spewing Out

RainyEyes · January 26th, 2017, 02:37

Hey all, long time no see.

I was wondering if anyone has had this issue before. On the TM M870 when I insert the gas reservoir into the shot gun all the gas gets released out the front barrel. No detours. No Passing go to collect $100. It simply releases all the gas and my tank is cold and empty.

I've taken the firing hammer off the release valve and it still appears to be releasing all the gas even when it's not being engaged. Is it because a spring is weak inside the valve or something else?

Help? :? :? :?

BioRage · January 26th, 2017, 10:07

Try a new tank?

Replace the O-Rings?

Valve needs tightening?

Danke · January 26th, 2017, 14:02

http://arniesairsoft.co.uk/forums/in...tuning-thread/

Read through here.

RainyEyes · January 26th, 2017, 14:08

Quote:

Originally Posted by BioRage

Try a new tank?

Replace the O-Rings?

Valve needs tightening?

The previous owner replaced the o-ring for the expansion chamber and this started happening.

How do I tighten the valve? The damn thing goes both ways.

Thanks danke. It says no permission to see that forum. I'll see if I can make an account or something.

Danke · January 26th, 2017, 19:01

Sign up to Arnie's and check out that thread. Really solid TM M870 problem solving info in it.

RainyEyes · January 26th, 2017, 20:43

Quote:

Originally Posted by Danke

Sign up to Arnie's and check out that thread. Really solid TM M870 problem solving info in it.

I tried clicking on the link you posted but after making an account it still says I do not have permission...

For some reason I didn't get an activation email. Anyway, I'm going to see if I can find a workaround to the site. Couldn't get a confirmation email but I could still log in strange enough.

Edit: looks like Arnie's doesn't like Hotmail either. Accessing now.

Edit Edit: Sorry for the double post. I have isolated the problem to a leaky o-ring due to insufficient hardness.
If anyone has recommendations on where to find harder o-rings suitable please let me know...

RainyEyes · February 2nd, 2017, 03:38

I have found a promising solution: https://www.youtube.com/shared?ci=m2Zs9KdDa7I

Apparently all the o-rings have been slipping due to this similar problem... Will report on the results.

https://www.youtube.com/shared?ci=wwSzPVlYoeA

RainyEyes · February 8th, 2017, 19:04

Just got my quad-rings 104 70 durometer installed. The thing works like a charm, no more leaks but now i gotta fix the damn tank reservoir.

RainyEyes · February 14th, 2017, 00:21

Hey so I've got some good news. I've done the mod 2 times and it seems to have worked both times. As a result I documented my findings and made a YouTube tutorial.

I hope this will help anyone else who has a similar problem:

https://youtu.be/ZIIO6bUd1qg

For anyone else who has this problem feel free to ask.

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January 26th, 2017, 02:37	#1
RainyEyes Trader rating Join Date: Sep 2013 Location: Scarbororororough	[Tutorial] TM M870 Gas Spewing Out Hey all, long time no see. I was wondering if anyone has had this issue before. On the TM M870 when I insert the gas reservoir into the shot gun all the gas gets released out the front barrel. No detours. No Passing go to collect $100. It simply releases all the gas and my tank is cold and empty. I've taken the firing hammer off the release valve and it still appears to be releasing all the gas even when it's not being engaged. Is it because a spring is weak inside the valve or something else? Help? :? :? :? Last edited by RainyEyes; February 14th, 2017 at 00:20..

January 26th, 2017, 14:02	#3
Danke Prancercise Guru Trader rating Join Date: Oct 2007 Location: Danger Zone	http://arniesairsoft.co.uk/forums/in...tuning-thread/ Read through here. __________________ Airsoft, where nothing is hurt but feelings.

January 26th, 2017, 19:01	#5
Danke Prancercise Guru Trader rating Join Date: Oct 2007 Location: Danger Zone	Sign up to Arnie's and check out that thread. Really solid TM M870 problem solving info in it. __________________ Airsoft, where nothing is hurt but feelings.

January 26th, 2017, 10:07	#2
BioRage Trader rating Join Date: Nov 2008 Location: Toronto	Try a new tank? Replace the O-Rings? Valve needs tightening?

February 2nd, 2017, 03:38	#7
RainyEyes Trader rating Join Date: Sep 2013 Location: Scarbororororough	I have found a promising solution: https://www.youtube.com/shared?ci=m2Zs9KdDa7I Apparently all the o-rings have been slipping due to this similar problem... Will report on the results. https://www.youtube.com/shared?ci=wwSzPVlYoeA

February 8th, 2017, 19:04	#8
RainyEyes Trader rating Join Date: Sep 2013 Location: Scarbororororough	Just got my quad-rings 104 70 durometer installed. The thing works like a charm, no more leaks but now i gotta fix the damn tank reservoir.

February 14th, 2017, 00:21	#9
RainyEyes Trader rating Join Date: Sep 2013 Location: Scarbororororough	Hey so I've got some good news. I've done the mod 2 times and it seems to have worked both times. As a result I documented my findings and made a YouTube tutorial. I hope this will help anyone else who has a similar problem: https://youtu.be/ZIIO6bUd1qg For anyone else who has this problem feel free to ask.

[Tutorial] TM M870 Gas Spewing Out

Gas Gun Solutions