Question about 2004 Ford F150
1 Siphon off the old brake fluid in the master cylinder reservoir under the hood.
2 Fill the reservoir with new brake fluid (don't reuse old fluid as it holds moisture and will corrode your brake system).
3 Start with the brake farthest from the Master cylinder, usually rear wheel, passenger side. Pull off the rubber cover on the bleeder valve. Attach the aquarium air line to the nipple on the bleeder.
4 Have your assistant pump the brake pedal up and down 3-4 times, then hold the pedal down fairly hard.
5 Open the bleeder, let fluid flow out through the air line into a waste container. (preferrably a clear bottle so you can see any air bubbles escaping the system). When the fluid stops and your assistant's foot hits the firewall (brake pedal all the way down), close the bleeder valve immediately!
6 Go to step #4 above and drain more fluid out of the bleeder valve until clean fluid comes out. Check the master cylinder every time and top it up as necessary. This procedure uses lots of fluid.
7 Now move to the rear brake on the driver's side. Go to step #4 and repeat the same procedures above until clean fluid comes out of the bleeder valve and no bubbles.
8 Next is the front brake, passenger side, same procedure. Then the drivers side and the same procedure.
9 When finished check for any leaks, remount rubber covers on the bleeder valve nipples. Remount all wheels, re-torque lug nuts after 50-100 miles of driving.
10 Start vehicle and depress the brake pedal. It should feel much less spongy than before this procedure. If not, there is air in the system, start over. Bleed everything again.
Note: if you assistant releases the brake pedal before you can close the bleeder valve then air will be introduced into the brake lines. This is no good! Before you start tell your assistant you will tell him/her PUMP, HOLD DOWN, RELEASE commands.
That's it, you're done. Congratulate yourself on saving some cash instead of handing it over to a mechanic.
Posted on May 13, 2009
I tried to bleed them this way and also with a high power air compressor pump and no fluid came out at all
Posted on May 12, 2011
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Posted on Jan 02, 2017
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Fig. 1: Loosen the front brake line in order to bleed the master cylinder
Fig. 2: Connect a bleed hose from the bleed valve on the front caliper to a jar of brake fluid
Fig. 3: Always follow the lettered sequence when bleeding the hydraulic brake system
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