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89 K1500 master cylinder replacement

Discussion in 'Chevy Trucks' started by Northman, Jan 13, 2011.

  1. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    Any one got a link for 89 K1500 master cylinder replacement.

    Had mine start leaking by the o-ring inside itself yesterday. Goes to floor almost and red brake light comes on, couple pumps brings the pedal back.

    Any links for a step by step master cylinder replacement appreciated.
     
  2. kashman

    kashman PlowSite.com Addict
    Messages: 1,070

    iv got the shop tech book for it . if your by cleveland more then happy 2 use it if not ill scan and post for you
     
  3. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    I ordered a new one today for $20 more the cost of a re-manufactured one. So should be in tomorrow and hope to try a install this weekend.

    1.5 hrs south of clev. No need to copy.

    I was just wondering about the bleeding part at the master cyl etc. Will soon see.
    It looks straight forward, I hope :drinkup:.

    Need to put a new heater control module in the wifes suv too. So it might be 2nd in line.
     
  4. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    same as any other basic master from the last 50 years. :dizzy:

    pull from box.

    install bleader hoses or plugs what ever comes in kit.

    fill with fluid 3/4 full.

    push plunger pistion area SLOW to watch all air blead from the master. good 5-10 min job .

    then install on truck and blead all 4 wheels .
     
  5. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    Thats the part I couldnt remember. Replaced 2 on a 91 back in the 90's but for the life of me couldnt remember that step. Hell getting old ;). :laughing:
     
  6. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    push fast = get a bath :laughing:
     
  7. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    Well this was a first.

    Put new, not a re-manufactured one either master cylinder on and brakes are worse then it was.

    Pre-bled master cylinder per instruction sheet etc and like I have done in past. Then bled all 4 brakes at brake cylinders and calipers. I'm at loss now. :help:

    Not losing any fluid.
     
  8. kashman

    kashman PlowSite.com Addict
    Messages: 1,070

    did you do them in the right order
     
  9. zzamud

    zzamud Member
    Messages: 49

    Didnt bleed lines enuff
     
  10. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    OK your going to have to explain this one :confused:. Never heard of such and I have been bleeding brakes on 60's 70's 80's 90's cars and trucks.

    I'm hoping just not bled enough too. Had my teenage son pumping the brakes and could be part of my problem.
     
  11. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    farthest away from master first then work your way up the system.

    your rig will be rr/lr/rf/lf

    and some 80's-90's crap box cars had cross blead setup. lr/rf then rr/lf stupid crap like that. :dizzy:
     
  12. kashman

    kashman PlowSite.com Addict
    Messages: 1,070

    abs brakes have 2 bleed in a certain order RR LR RF LF
     
  13. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588



    abs or not on this vehicle thats the order. as its the longest run to shortest run in order.

    abs has basicly nothing to do with the order on this vehicle.
     
  14. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    Never new about this bleeding order stuff Thumbs Up. I have been getting away with it for years doing, my usual fl,fr,lr,rr. No certain order. Got lucky I guess till now.

    Will give it another go soon.


    Thanks for info guys.
     
  15. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    yep got to get the longest run done first. or possible air bubble can get traped in the system.
     
  16. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    Well yesterday I bled the whole system the way that was described above. When done the pedal still went to the floor before very little brakes were applied, just enough to get stopped and brake light comes on.

    So now I am going to wait til I can pull all 4 corners and check whats going on with the front calibers and rear brake cylinders.

    This one has me puzzled, any other trouble shooting ideas? Anti-lock crap or proportion valve?
     
  17. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    did you forget the pin between the master and booster mabye ?
     
  18. Northman

    Northman Senior Member
    from Ohio
    Messages: 201

    I'm not understanding, pin between? :help:
     
  19. kashman

    kashman PlowSite.com Addict
    Messages: 1,070

    or a blown seal at the rear cylinder
     
  20. zzamud

    zzamud Member
    Messages: 49

    Is the pedel hard when engine off? If not theres air somewhere. If so and pedal goes to floor when engine running you have other problems