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    Re: Help with engine ID.

    The 121.924 is from a 190C sedan.

    Walt
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    Re: Club alternator issue

    I think what is occurring is that your second light goes from the terminal block to the lamp to ground but the dash light goes from the terminal block to the dash light to the positive battery...
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    Re: Club alternator issue

    Steve,

    The light should be out with the engine running. At which “terminal block” are you checking voltage? Also, are you sure you haven’t wired the two lights in series rather than parallel?
    ...
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    Perhaps this will help - Walt

    Perhaps this will help - Walt
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    Re: Any Poppet Valve removal advice?

    Itís just that I have never seen anything other than natural aluminum on a 190sl. Iím always open to being proven wrong.

    Really appreciate the work youíre doing on providing a replacement part. ...
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    Re: Any Poppet Valve removal advice?

    Wally,

    I would debate that the original coloring was natural aluminum.

    Walt
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    Re: Rear axles are out...

    Could you have possibly mixed the left and right axle shafts? The left side is longer.

    Walt
  8. Thread: brakes

    by wpuryear
    Replies
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    684

    Re: brakes

    My thoughts also.

    Walt
  9. Thread: brakes

    by wpuryear
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    684

    Tom, Yes, 23 inches vacuum less any loss...

    Tom,

    Yes, 23 inches vacuum less any loss across the check valve. For the rear (high) side of the piston I did not use the rear port but the more convenient one on the front as the photo below. ...
  10. Thread: brakes

    by wpuryear
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    684

    Re: brakes

    Yes, vacuum is the same on both sides in a static condition. As pedal pressure is applied, atmospheric air is admitted to one side producing an increasing differential proportional to the master...
  11. Thread: brakes

    by wpuryear
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    684

    Re: brakes

    Tom,

    I have 500 to 550 psi with no vacuum measured at the slave cylinder output. The vacuum readings are taken at the test port for the high side and tee’d into the vacuum pipe near the battery...
  12. Thread: brakes

    by wpuryear
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    684

    Re: brakes

    Installed my new high pressure gauge and a vacuum gauges on each side of the big piston. Used a vacuum pump down to 23" Hg and even with that differential couldn't get over 900 psi hydraulic...
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    Re: Rear axles are out...

    I was always able to insert by moving the axle around until it found the universal (53). You might try a flashlight and turn the left wheel until the slip universal lies on the bottom of the axle...
  14. Thread: brakes

    by wpuryear
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    Re: brakes

    I think we are saying the same thing - it's the pressure differential across the big piston. The chart is in absolute pressure terminology but when we speak of vacuum we're referring to gauge...
  15. Thread: brakes

    by wpuryear
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    684

    Except increasing control pressure should make...

    Except increasing control pressure should make vacuum decrease on one side of the piston and stay relatively constant on the other. I thought perhaps differential across the big piston but the...
  16. Thread: brakes

    by wpuryear
    Replies
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    684

    Re: brakes

    Coy,

    With 500 psi inlet (control) pressure, I read the graph as saying the T50 should produce 850 to 950 psi for 15 to 20 in. Hg vacuum. Not 2:1 but certainly more than I'm achieving. I still...
  17. Thread: brakes

    by wpuryear
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    684

    Re: brakes

    Spoke to Will Samples today who informed me the booster should have a 2:1 advantage. 500 psi from the master cylinder should be doubled to 1,000 psi after the booster. Rebuild time.

    Walt
  18. Thread: brakes

    by wpuryear
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    684

    The mystery continues. Deglazed all the brake...

    The mystery continues. Deglazed all the brake shoes, braking improved but still can't lock up a wheel. There is no evidence of leaking brake cylinders, not a lot of dust, no oil or grease, and as I...
  19. Thread: brakes

    by wpuryear
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    684

    Re: brakes

    Yes, have those. I’m going to document hydraulic pressure with and without the booster tomorrow. I know it’s over the top but it’s fun - and good for future reference.

    Walt
  20. Thread: brakes

    by wpuryear
    Replies
    32
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    684

    Re: brakes

    Yes.
  21. Thread: brakes

    by wpuryear
    Replies
    32
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    684

    First I checked for leak down, started thr...

    First I checked for leak down, started thr engine, blipped the accelerator to get maximum vacuum which was 19mm mercury, then shut it down. It leaked down to 18 inchís in an hour so all is...
  22. Thread: brakes

    by wpuryear
    Replies
    32
    Views
    684

    brakes

    My brakes are not working as well as they should. I tested the booster this morning and it's performing as it should, holds vacuum well and progressively bleeds down with increase pedal pressure. ...
  23. Sounds like the large piston (72) is passing over...

    Sounds like the large piston (72) is passing over a bad spot(s) where atmospheric air is escaping around the seal resulting in a loss of vacuum and a harder pedal. Tom’s test of removing the hose...
  24. I see only two routes for air to reach the intake...

    I see only two routes for air to reach the intake manifold through the booster. Past the seal formed by the rear of the vacuum poppet and valve diaphragm (79 and 11) and around the power piston seal...
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    The surface in Marco's third photo (with the...

    The surface in Marco's third photo (with the ruler) is where leakage might occur and it can be examined without disassembly. The other poppet seal, (84) on the outside but not visible, admits...
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