 Rear Brake bleeding question |
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| Frankvw |
 May 21 2020, 10:09 AM
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#1
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working on my first 914 !  Group: Members Posts: 653 Joined: 13-April 16 From: Holland, the Netherlands Member No.: 19,896 Region Association: Europe  |
Hi all, I replaced the calipers and pads and flex hoses in the rear. (1973 1,7)
Old brake fluid from reservoir removed with siringe and filled with new fluid. I did set the clearance on the inner and outer on both sides. Then I did bleed the brakes and checked the clearance again (was still OK) Now the proportioning valve part....do I need someone to push the pedal to the floor, keep pedal at floor and then I bleed again while pedal is down? Or does it work another way ? Or is it not needed after what I already did ? Thanks for your reply ! |
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| IronHillRestorations |
May 21 2020, 12:46 PM
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#2
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I. I. R. C. Group: Members Posts: 6,918 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None 
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Here's how I bleed a 914 brake system, from my post back in Mar 05.
Remember the "Search" function is your friend! Get a spare cap for the brake fluid reservoir. Get a tire valve & stem. Drill a hole in the center of the reservoir cap, the same size as the hole in a wheel (or measure the narrow part of the tire valve). Pull the valve stem through the hole. Remove the plastic screen in the reservoir. Fill the brake reservoir completely, not to the fill line, all the way full to the bottom of the tube that holds the plastic screen. Put on your new modified pressure bleeder cap. Drain your air tank to 10 psi, for cheaper compressors setting the regulator at 10 psi may not work. If you put too much pressure in the system, you'll blow off the blue lines that connect the supply lines to the reservoir, or worse. Take a clip on air chuck and clip it on your new pressure bleeder cap. Bleed the brakes, starting at the furthest bleeder from the master cyl, and finish at the bleeder nearest the master cyl. Bleeding sequence (RR-LR-RF-LF) EDITED FROM ORIGINAL POST Pump the pedal hard about ten times and repeat the procedure. Do not get brake fluid on painted surfaces it will ruin them. If the pressure bleeder cap retains pressure, bleed it down before taking it off the reservoir. This works very well, and makes it a one person job. Replace brake fluid every two years. Properly discard used brake fluid. PMB has a good method as well: PMB Gravity Bleeding Method |
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Posts in this topic
Frankvw Rear Brake bleeding question May 21 2020, 10:09 AM
davep Do you have a proper solid pedal feel? If you circ... May 21 2020, 10:49 AM Frankvw well...thanks for the reply ! But it is still ... May 21 2020, 10:54 AM cuddy_k :agree: The pressure system is great. I use the Mo... May 21 2020, 01:07 PM 914Toy I use a similar system as the post above, but use ... May 21 2020, 01:18 PM twistedstang Pressure bleed with a homemade setup or a Gunson e... May 21 2020, 01:54 PM Frankvw thanks all for the replies. System did not run dry... May 21 2020, 02:32 PM twistedstang I'm probably wrong but I thought I read somewh... May 21 2020, 03:00 PM Frankvw "I'm probably wrong but I thought I read ... May 22 2020, 01:22 AM
IronHillRestorations One problem with vacuum bleeding is you pull air a... May 22 2020, 07:57 AM |
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