M116A3 Master Cylinder Help

[Skispcs]

I picked up my M116A3 today and when I was checking it out, I discovered the interesting mod to the master cylinder cap as shown in the attached picture.
Needless to say, I drove it home without brakes after asking if I could swap it with one of the other trailers

Any idea what this was done for? Maybe they were trying to bleed the brakes and had it in a large container of brake fluid?

The big questions is, does anyone know where I can get a replacement master cylinder cover?

 

[Evil Dr. Porkchop]

I don't see any mods to that cover. Looks like the standard cover on most a3 series trailers.

 

[Skispcs]

The Tech manual shows a regular screw on cover like you would expect, TM 9-2330-202-13&P page 003-1
But the trailer has the bent piece of brake line with the hose clamped onto the end.
Where the brake line enters the cap has a heavy layer of silicone.

If the hose is supposed to be there, then why does it spray out brake fluid when the surge is activated.
I added some brake fluid and went on a test drive. Came back and the whole front of the trailer was covered in fluid that sprayed out of the hose.

 

[Evil Dr. Porkchop]

Earlier trailers had different covers, most a3 trailers (that I've seen) have that style cover. As far as a replacement, its a standard part used in civilian applications.

 

[Skispcs]

Thank you for the reply.
I did find a drawing of that hose in another part of the technical manual.
Something doesn't seem to be right though if the trailer is spewing brake fluid out of the hose.

 

[juanprado]

The other style which works just as well is a vented cap. Available at croft trailer part 850279

http://www.crofttrailer.com/hydro-act-surge-brake-actuator-parts/?sort=featured&page=2

I don't like that tube style because of wasps/mud daubbers etc.

I wonder if you have another problem because the fluid should not come out. Maybe your shock is worn and it over activating or possibly the master cyl is bad?

Is the fluid clean? I have seen some trailers with borrowed caps full of rust/water

 

[Jeepsinker]

The cap is right. It is spraying fluid because the master has a failed internal seal.