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Roll your own pressure bleeder.

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Don't like the way he attached the Schrader valve, but I guess if it works it works. Same goes for threading an NPT fitting into a rough-cut plastic hole that only allows for maybe 2 engaged threads at most.

Last thing is, I would put an inline filter near the point of use to catch any crap inside.
 
Howard said:
Don't like the way he attached the Schrader valve, but I guess if it works it works. Same goes for threading an NPT fitting into a rough-cut plastic hole that only allows for maybe 2 engaged threads at most.

Last thing is, I would put an inline filter near the point of use to catch any crap inside.
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Yeah the master cylinder cap needs some refinement. Instead of one thick o-ring, flat neoprene washers would be a better choice. More threads left for proper engagement. I'd also change how it's mounted. Instead of using the larger fitting, I'm going to use a brass nut and lock washer. That way you can add a length of tubing to the underside of the cap to keep it from overfilling the reservoir.
 
Kaervak said:
Yeah the master cylinder cap needs some refinement. Instead of one thick o-ring, flat neoprene washers would be a better choice. More threads left for proper engagement. I'd also change how it's mounted. Instead of using the larger fitting, I'm going to use a brass nut and lock washer. That way you can add a length of tubing to the underside of the cap to keep it from overfilling the reservoir.
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My issue is not with the thickness of the O-ring. The factor that determines the thread engagement is the thickness of the plastic alone - I would have preferred to see a bulkhead fitting where there is a nut on the other side.
 
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Howard said:
My issue is not with the thickness of the O-ring, it is used somewhat properly in the guise of a static axial (face) seal. The factor that determines the thread engagement is the thickness of the plastic alone - I would have preferred to see a bulkhead fitting where there is a nut on the other side.
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Oooh, good idea. Thanks. 🙂
 
That's a good system, only problem is you have to keep removing the cap the fill the resevior. ABS systems are much more difficult to bleed (hidden passeges).
 
A mechanic buddy of mine has a system with a universal cap with a strap/clamp on it to ensure a seal. It has a connection that threads onto your tire valve and uses the pressure from your tire air. I can't imagine it's very expensive, though I don't know where to find one or the proper name for it.
 
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