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Old 02-09-2019, 09:22 PM   #11
Mini-Skoolie
 
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Location: Arkansas
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Year: 2005
Chassis: School bus
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Quote:
Originally Posted by one_eyed_jack View Post
If you have a cap it would be real easy, just drill and tap it to 1/8 pipe and get a valve stem that has 1/8 pipe thread on the other end.
I've got spare caps so I'm good there
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Old 02-09-2019, 09:24 PM   #12
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Quote:
Originally Posted by one_eyed_jack View Post
If you have a cap it would be real easy, just drill and tap it to 1/8 pipe and get a valve stem that has 1/8 pipe thread on the other end.
I've got extra caps so I'm good
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Old 02-09-2019, 09:29 PM   #13
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Originally Posted by magnakansas View Post
There are two ways the bosch/bendix hydro max can be wired.

1) more basic low level system, has fewer wires and parts.

2) more woop dee doo level system has more parts and a kind of diagnostic module

The electric pump runs all the time if there is some sort of fault or a problem in the system. The pump is a back up to the power steering pump.

on the work bench, you should have a fitting in the master cylinder outlet ports. then on the fittings you have some sort of pipe or tube going back to the reservoir. brake master sitting up right ..fill reservoir with brake fluid, now with some sort of tool push in - full stroke - on the plunger of the master brake cylinder..... you should see brake fluid and air bubbles going out the tubes into the reservoir. after several strokes, you should see pretty much just brake fluid. This is called "bench bleeding"

Now that this is done... wait...... Is the plunger -- the little rod thingy sticking out of the end of the booster? this part is going to be the thing that pushes in on the brake master cylinder when you step on the brake pedal.

okay, now that we know the push plunger thing is there. bolt the master cylinder in place, loosely. those tubes and fitting things should still be in place.

take out one of those fittings... and as quickly as you can thread in by hand the brake fitting/pipe of the bus into the hole... get at least two turns by hand, tighten fitting. care full how tight, you can crack or split the end of the brake line if you tighten too much. err on loose, you can tighten a bit more if we have a leak there. now do the other pipes to the master cylinder.

now that all brake pipes are connected and tight, tighten the master cylinder.

now you are ready to bleed brakes.... maybe.

you should be able to gravity bleed brakes.....

fill to the top the brake master cylinder. leave the lid off the reservoir, unless there is dirt, dust, rain hail or snow able to get into reservoir. In that case just set the cap on the top, do not screw it on.

now go down to the front right wheel and open the bleeder screws. you should have fluid run out with air bubbles after a minute or two.....

If you do not have fluid leaking out after a couple of minutes, your rubber brake lines are likely in need of replacing..... The bummer thing is.

in order to check your rubber brake lines, you will destroy the part in the process. if the fluid is not flowing..... loosen the top end of the right front brake hose where it connects to the brake pipe...... I would then expect the fluid to weep or leak here after a minute or two. if you have fluid at the top of the rubber hose, but not down low at the caliper/brake drum. Then it is highly likely your rubber hose is shot.

cut the rubber hose in the middle, use some thing very sharp to get a good clean cut.... I expect you find the center closed up, like a millimeter or less.

you need new rubber brake hoses... replace them all.

fill the master again, attempt to bleed.

william
Ok Awsome info thank you very much going to check them hoses after new pump is on also been looking at that no woopdee do wiring probably going to go that route
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Old 02-12-2019, 09:39 PM   #14
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Well I got a remanufactured master cylinder and apparently somewhere along the lines I dropped the primary and secondary compensating valve's out of my old master cylinder and so the new master cylinder which has both valves works great thank you all for your help
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