Brakes lock up

Tiny
BRIANGAILEY
  • MEMBER
  • 1991 MERCEDES BENZ 190D
  • 2.6L
  • 6 CYL
  • 2WD
  • 260,000 MILES
I have a 1991 Mercedes 300e and the brakes lock up while driving down the road. As I am driving the brake peddle gets hard and doesn't move and the brakes lock up. I have replaced the brake booster, master brake cylinder, all 4 calipers, all 4 brake hoses and swapped out the abs control box and I have no idea what to do next. Can someone please point me in the right direction?
Sunday, March 13th, 2016 AT 5:48 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Check that you have pedal clearance between the brake pedal and the master cylinder, you should be able to feel a few mm free movement when you push the brake pedal down, there will be adjustment on the pushrod into the booster.
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Monday, March 14th, 2016 AT 3:10 AM

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