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#1
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Brake system bleeding, master cylinder bleeding + a damage warning
Bench Bleeding
http://www.valvoline.com/carcare/articleviewer.asp?pg=res20020701bm&cccid=5&scccid=9 Installing a new master cylinder requires a bench bleed to ensure all the air is removed from the unit. http://www.misterfixit.com/brakbld1.htm Bench Bleeding the Master Cylinder http://www.custompistols.com/cars/articles/dw_benchbleed.htm http://www.google.com/search?hl=en&lr=&q=how+to+bench+bleed+the+master+cylinder&btnG=Search Last edited by whunter; 03-18-2007 at 11:15 PM. |
#2
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Thanks Whunter! Very helpful information.
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Roc '74 350SLC (Euro) (For Sale) '01 CLK55 '02 Jaguar XK8 '04 E320 Wagon '89 Ferrari Mondial T Coupe '57 Volvo PV-444 (Vintage Racer in build) (For Sale) '80 Mazda RX7 Enduro Race Car (For Sale) |
#3
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Warning: Over-stroking the master cylinder may cause it to fail.
This can happen to even the most experienced mechanic, "Especially" on a high mileage car.
The old school manual brake pedal "down" - "up" - "down" - "up" bleed method risks over-stroking the master cylinder. The master cylinder piston seals can get scored if they're pushed into a normally unused - corroded, region of the master cylinder's bore. If this happens, you'll have little or no brake pedal, and will need a new master cylinder. I strongly recommend using a pressure bleeder to avoid the issue. Last edited by whunter; 10-02-2011 at 10:29 PM. |
#4
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I searched for the nipples for bench bleeding mine for a while.. since they are metric.... finally found them at NAPA.... I think the kit had both SAD and METRIC multiple sizes for less than $10... just remember where you store it and you are fixed for life...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#5
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FYI
Quote:
Home depot or Lowe's always have a cheap one gallon bug sprayer. #1. Buy it, the cheap sprayer I got today cost me $8.99. #2. Buy a quart or gallon of brake fluid. #3. Rip or cut the wand nozzle off. #4. Replace the wand nozzle with a piece of vacuum hose that fits the tube + is large enough to fit over the master cylinder line port. #5. Put at least a quart of brake fluid in the bug sprayer. #6. Pump up the bug sprayer. #7. Mount the master cylinder/reservoir assembly in a vice or on the car. #8. Remove the reservoir cap. #9. With one hand, hold the vacuum hose firmly on the master cylinder line port you want to bleed. #10. Squeeze the wand trigger with your other hand. #11. You should hear a brief bubbling gurgle, but keep reverse filling until you are sure that section of the reservoir is at least 1/4 - 1/2 full. #12. Repeat steps #9, #10, and #11, on each line port. #13. Attach the brake lines, fill the master cylinder and bleed at all four wheels as needed. Total master cylinder bleed time is generally less than 90 seconds. 1-Gallon Economy Sprayer-1401P at The Home Depot
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#6
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Bump
for customer
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
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