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2004 International 7300

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
I guess I need to get a longer handle chain wrench. And maybe try shrinking it. I assume you are referring to dry ice or similar?
 

cfherrman

Senior Member
Joined
Jun 3, 2022
Messages
1,801
Location
Hays, Kansas
Take a torch and heat it up, take a smoke break and let it cool down and the metal will shrink, then try it.
 

Willie B

Senior Member
Joined
Jan 2, 2016
Messages
4,061
Location
Mount Tabor VT
Occupation
Electrician
I'm trying to understand the brass. I see female thread inside the steel barrel. I presume there must be male thread outside the barrel & Female in the brass, but I don't see them.
Do you know the brass comes off? Might repack be accomplished without removing the brass part?
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Cfherrman, I did try heating the steel barrel and letting it cool. I'll try it with just the brass.

Willie, I was able to get the brass nuts off the top two stages. The threads you are seeing are from the next stage that is pushed back into the lowest barrel. Here are some pictures to help clarify

PXL_20220913_205834404.jpg

PXL_20220913_205812199.jpg
 

mekanik

Senior Member
Joined
Aug 20, 2015
Messages
957
Location
Canada's Northwest
It looks like there is a lock pin drilled and staked in place.
0Koe2pg.jpg


sMXXrmm.png
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Yes, there was a brass pin there. I drilled it completely out so it shouldn't be restricting removal of the nut.
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Finished a job a little early today so spent some time this afternoon building a wrench.

PXL_20221011_221323762.jpg

After about an hour of pounding on the wrench handle with a 3 lb hammer and heating the barrel and reinforcing the wrench several times, I was able to get a little over one full turn on the nut. It is VERY tight. Regular work for a day or two will give my arm a little time to recover for the next round.
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Well I gave up on that Mailhot cylinder. I did finally get the nut removed, but must have deformed the cylinder wall in the process because the barrel gets hung up when I try to pull it apart.

I installed a new cylinder from Northern tool, which I'm hoping will have enough force to dump a full load. We will see.
PXL_20221201_170151176.jpg

More recently I've been working on the pintle hitch and trailer wiring. I need to be able to tow an electric brake trailer, so now I'm installing the brake controller. I'm trying to find the best location to install the double check valve that will supply signal air to the controller. The diagram that came with the controller is very basic and I'm not very familiar with air systems. Does anyone have some pointers on where to plumb this in?
PXL_20221229_165116121.jpg
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Also, I'll need to plumb the pintle plunger at some point. What's the proper way to do that? I've read about some guys tee-ing into the lines that release the parking brakes, but I wasn't sure if that's the correct way to do it.
 

Willie B

Senior Member
Joined
Jan 2, 2016
Messages
4,061
Location
Mount Tabor VT
Occupation
Electrician
Your trailer is a bit heavier than mine. Mine gets signal for the electric brake control from the brake light switch, not from truck air.
 

mekanik

Senior Member
Joined
Aug 20, 2015
Messages
957
Location
Canada's Northwest
I really don't think you need to cut both lines and install a double check valve. The two delivery ports are one for rear axle application and one for steer axle and trailer application. I have installed a few air over electric controllers using the rear axle application line to activate them. If you had a trailer air service line then that is the one you would connect it to.
Normally the trailer emergency air goes to operate the pintle plunger. You should be safe tapping into the air that releases the rear park brake chambers.

Be VERY careful working under that elevated box!
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
Your trailer is a bit heavier than mine. Mine gets signal for the electric brake control from the brake light switch, not from truck air.

Probably not much heavier. But I don't like the basic brake controllers that are just on or off. This one senses the air pressure and applies the trailer brakes proportionally.
 

materthegreater

Senior Member
Joined
Jul 25, 2012
Messages
673
Location
VT
I really don't think you need to cut both lines and install a double check valve. The two delivery ports are one for rear axle application and one for steer axle and trailer application. I have installed a few air over electric controllers using the rear axle application line to activate them. If you had a trailer air service line then that is the one you would connect it to.
Normally the trailer emergency air goes to operate the pintle plunger. You should be safe tapping into the air that releases the rear park brake chambers.

Be VERY careful working under that elevated box!

Ok, that makes sense. Maybe I'll put a ball valve in as well so I can shut it off if need be.

Thanks, I use a prop when working under the raised box
 
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