trying to solve solve soft brake pedal since weekend

[Paisano]

I going to pick up 1/4 inch NPT air coupler from Auto Zone today.
I don't know if this is the right one.

I saw this part description online also: 3/8 inch female NPT with 1/4 inch body flow
This seems to make more sense.

The quick coupler I need is already mounted on my air compressor. I just need a second one for the Mityvac.

Can't really screw the hose right in to the mityvac fitting. Air hose fitting doesn't rotate.

I'll follow up

 

[pentode]

I going to pick up 1/4 inch NPT air coupler from Auto Zone today.
I don't know if this is the right one.

I saw this part description online also: 3/8 inch female NPT with 1/4 inch body flow
This seems to make more sense.

The quick coupler I need is already mounted on my air compressor. I just need a second one for the Mityvac.

Assuming I'm following you, just considering the tool end of the hose, what I was suggesting was removing the quick connect from the Mityvac and screwing the hose directly in. In Curious Hound's photo it does look like the quick connect is removable.

Don't want to mess up your plan, just trying to save you a trip.

 

[Curious Hound]

In Curious Hound's photo it does look like the quick connect is removable.

He may have a different model of MityVac system. They make a bunch of products.

 

[pentode]

Very good point, I would just check before I spent money on an uber. I'm just trying to be cheap here.

 

[Paisano]

I cannot screw the air hose fitting onto the mityvac fitting. Yes it would fit. But the air hose fitting does not rotate to screw in.
I have not taken Uber ride yet. The AutoZone is within walking distance. I think what I need is:

quick connect coupling
3/8 inch female thread
1/4 body flow push to connect (no threads)

But I'll find out when I pick up the one from Auto Zone

 

[pentode]

I cannot screw the air hose fitting onto the mityvac fitting. Yes it would fit. But the air hose fitting does not rotate to screw in.
I have not taken Uber ride yet. The AutoZone is within walking distance. I think what I need is:

quick connect coupling
3/8 inch female thread
1/4 body flow push to connect (no threads)

But I'll find out when I pick up the one from Auto Zone

Forgive me because I'm terrible at visualizing things, but couldn't you screw the tool onto the hose? Or rotate the whole hose?

I'll stop offering advice now, hope it works out well for you.

 

[Paisano]

It's ok Pentode and group. I know you're all trying to help.

I picked up a quick connect coupler at AZ and it does fit both air hose threaded fitting and Mityvac plug.
The unit of measure convention for this part type was confusing to me. But the label only says 1/4 " NPT........just like Eric said it would. And it fits

I'll run the Mityvac and report back sometime tomorrow.

 

[Curious Hound]

It's ok Pentode and group. I know you're all trying to help.

I picked up a quick connect coupler at AZ and it does fit both air hose threaded fitting and Mityvac plug.
The unit of measure convention for this part type was confusing to me. But the label only says 1/4 " NPT........just like Eric said it would. And it fits

I'll run the Mityvac and report back sometime tomorrow.

All part of your education. Good luck with the bleeding.


Brake bleeding, that is.

 

[Paisano]

Ok. Thanks.
(To answer your question Gump......tried gravity bleeding years ago and it didn't work out. I also recently retrofitted a new brake line
with upward slope in one spot)

 

[Jazzer]

The upward slope in the line shouldn’t matter one bit with gravity bleeding, as the master cylinder is higher and gravity should push the fluid up and over.

 

[Paisano]

I read your comment Jazzer. Yes......what you and Gump are saying does makes sense now from a physics standpoint.

Please bear with me. I am currently road testing.

 

[Paisano]

Ok. At this time, My truck is drivable to work on secondary roads.
There is too much brake pedal travel......however......the brakes stop the truck before the pedal bottoms out.

I ran the Mityvac on all 4 wheels for a long time this morning.

I'm thinking I should run another complete 4-wheel bleed procedure tomorrow night after work. after I ask the Mityvac tech support a couple questions. At the time I finished the procedure, I was still seeing 'foamy' fluid with tiny bubbles.
The Mitvac bleeder hose has a rubber boot that fits over the bleeder screw. It's not very tight.
I wonder it the vacuum was pulling in some outside air around the boot.

As it stands now.......it appears I am almost there

 

[alwaysFlOoReD]

With my vacuum bleeder, I was pulling air from the threads of the bleeder. I thought about using Teflon tape or heavy grease to block air ingress but never did try. Just bled until the fluid was clear.

 

[Paisano]

Yeah, That's what I was thinking too......pulling in air around the bleeder screw threads.
I might try some silicone grease, or just remove the boot and push the vinyl tube onto the bleeder.