Couple of air line questions / Secondary tank

[Reworked LMTV]

Hi Guys,
Been a while since I have been active on here. Heat in the south was too much to work on truck much.

Couple of air line questions. What type of valve is pictured here on the secondary tank ? Is it the 2 way check valve or the inversion valve? Looks like it vents excess pressure. There is a 1/4" line at the top. Does this feed the air over hydraulic manifold? I pulled on the line and it was not attached to anything. Obviously went somewhere lol

Thanks!

 

[coachgeo]

Hi Guys,
Been a while since I have been active on here. Heat in the south was too much to work on truck much.

Couple of air line questions. What type of valve is pictured here on the secondary tank ? Is it the 2 way check valve or the inversion valve? Looks like it vents excess pressure. There is a 1/4" line at the top. Does this feed the air over hydraulic manifold? I pulled on the line and it was not attached to anything. Obviously went somewhere lol

Thanks!

think an airline schematic has been posted while you were away. I'll see if I can find it

 

[coachgeo]

think an airline schematic has been posted while you were away. I'll see if I can find it

well..... not finding a schematic but

this should help you easily

another with some info

 

[Ronmar]

Hi Guys,
Been a while since I have been active on here. Heat in the south was too much to work on truck much.

Couple of air line questions. What type of valve is pictured here on the secondary tank ? Is it the 2 way check valve or the inversion valve? Looks like it vents excess pressure. There is a 1/4" line at the top. Does this feed the air over hydraulic manifold? I pulled on the line and it was not attached to anything. Obviously went somewhere lol

Thanks!

The one off the secondary tank is a 2way check with that remote control valve in your pic attached. It uses park air to control air supply to the manifold and AOP. Keeps someone from raising the cab once the park brakes are released.

The 2way it is attached to provides pri or sec air. The larger line comes from park air to control output on the smaller line to the AOP valve on the hydro manifold.

I just did a video on Youtube removing that valve and the 2way as my AOP is long gone… I didn’t cover that valve in the other brake video Geopen linked to above.

 

[Reworked LMTV]

well..... not finding a schematic but

this should help you easily

another with some info

Thanks! Still could use that schematic if you know where it might be : )

 

[Reworked LMTV]

The one off the secondary tank is a 2way check with that remote control valve in your pic attached. It uses park air to control air supply to the manifold and AOP. Keeps someone from raising the cab once the park brakes are released.

The 2way it is attached to provides pri or sec air. The larger line comes from park air to control output on the smaller line to the AOP valve on the hydro manifold.

I just did a video on Youtube removing that valve and the 2way as my AOP is long gone… I didn’t cover that valve in the other brake video Geopen linked to above.

My AOP is gone too. Too many issues. Do you have a link to your video?

 

[coachgeo]

My AOP is gone too. Too many issues. Do you have a link to your video?

for future reference.... you can click on someones youtube video (like RonMar's above) and then click to go their home youtube page....... you can then find all their videos they posted

Im guessing Ron is referring to this one

 

[Ronmar]

Yep, that s it…

 

[Reworked LMTV]

Yep, that s it…

Nice informative video!

 

[wheelspinner]

Thanks! Still could use that schematic if you know where it might be : )

I have all of the electrical/air/hydraulic schematics in a separate PDF. I thought I had downloaded them here? I know I did on one of the LMTV FB groups. I’ll try to get them up here also

 

[Reworked LMTV]

I have all of the electrical/air/hydraulic schematics in a separate PDF. I thought I had downloaded them here? I know I did on one of the LMTV FB groups. I’ll try to get them up here also

Great! Appreciate your efforts for the LMTV community. I don't use FB, since they sell your data to players, including China.

 

[Ronmar]

Thanks! Still could use that schematic if you know where it might be : )

Message me with an email and I can send you a copy of just the schematic section .PDF clipped out of the main service manuals…

 

[Reworked LMTV]

The one off the secondary tank is a 2way check with that remote control valve in your pic attached. It uses park air to control air supply to the manifold and AOP. Keeps someone from raising the cab once the park brakes are released.

The 2way it is attached to provides pri or sec air. The larger line comes from park air to control output on the smaller line to the AOP valve on the hydro manifold.

I just did a video on Youtube removing that valve and the 2way as my AOP is long gone… I didn’t cover that valve in the other brake video Geopen linked to above.

When you removed the valving, what did you do with the large air line. Did you plug it or cap and its other end?

 

[Ronmar]

When you removed the valving, what did you do with the large air line. Did you plug it or cap and its other end?

You would have to do that yes as it would deliver park air to that line when you released the park brakes. In my case I had already removed that line when I deleted the front gladhands.

That line runs up to behind the drivers side grill to the output of the top 2way check valve. There is a pressure sw there that controls the park and emergency dash lights. I think it Ts off right after that switch…

 

[coachgeo]

.....copy of just the schematic section .PDF clipped out of the main service manuals…

Ron maybe you can add this to the TM forum here???

moderator/Admin ?? could he???

 

[Ronmar]

Ron maybe you can add this to the TM forum here???

moderator/Admin ?? could he???

Yea there wasn't any option to post in the TM section when I looked to do this a while back, so I assume it will take an admin to allow it…

 

[Ronmar]

Something I have noticed since I removed these valves is that my truck is holding air really well now. I havn’t run it in nearly a week and it is still setting over 90PSI as of this morning… I suspect this valve was leaking air back into the park air line…

 

[Reworked LMTV]

Something I have noticed since I removed these valves is that my truck is holding air really well now. I havn’t run it in nearly a week and it is still setting over 90PSI as of this morning… I suspect this valve was leaking air back into the park air line…

Interesting. Yeah, only as strong as the weakest link I guess.