Walker Hydrostatic Drive-Rebuild?

Discussion in 'Mechanic and Repair' started by ed2hess, Apr 29, 2005.

  1. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    Mr. Fixer

    I grasping for straws here but is there a chance that my leaking seal could be allowing air into the system? When I rotated the right wheel with my hand it didn't have constant force on it, making me think that hydro is bad. Will that right side hydro come out without removing the blower? Looks like I will need to use a puller on the pulley.

    Thanks you again for all you comments...
     
  2. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    Part of the blower will need to come out. The funnel shaped piece on the front of the blower needs to come out. There are only 3 nuts holding it to the blower box. Just to replace the input shaft, bearing and seal you do not need to remove the pump. NOTE= Speical tools are needed to replace the seal. The first will be a puller to get the pulley off the shaft. A regualr puller will not do and you will have to make or grind a puller to use. I use a modifed puller at work. I will try to bring it home to get pictures of it. The second tool is a puller as well and it is made from a 2" piece of pipe. I will draw that one for you. There is a snap ring that holds the bearing in place and it can be a pain to get out. Good luck.
     
  3. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    I pulled the hydro pump out no problem. I see that this pump can be pulled apart but I assume that this is not necessary if I get a new pump. I just take off the actuating lever, pulley and gear? I have NO hope of putting a new seal in this thing and getting it to work. I can turn the pulley manually with the lever actuated and I get practically no constant output to the gear.
     
  4. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    Fixer67-I have decided not to replace the seal. Would you post a picture of the modification you made to the puller to get that pulley off? And the actuating lever, what is best way to get it off? All this is pot metal and will break easily I would assume.
     
  5. Triple L

    Triple L LawnSite Senior Member
    Posts: 504

    Ya, it kind of kicks out for a second, then it kicks back in. I can still back up no problem thought I have to pull one back further then the other. Do you think its the pump. I can't drive a straight line when I have it anywhere near full speed, Going slow though it seem to be pretty good.
     
  6. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    The actuating lever is just held in place by one of the four bolts that holds the pump to the final drive. Just take the bolt out and the actuating lever will fall off. NOTE=The actuating lever one the right side (Battery side) has a nut that goes on the bolt that goes all the way though the pump and holds the surport for the jackshaft. That nut has to be removed before the bolt can be unscrewed. I will post then pictures for you of the puller.
     
  7. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    The puller is AmPro Model T70068

    http://www.partsamerica.com/ProductDetail.aspx?mfrcode=APO&mfrpartnumber=T70068

    Picture one shows the cut out you will need to make.
    Picture two and three show how it fits. I had an extra pulley to go by when this puller was made but I am guessing you do not have an extra pulley. The cut is about 1/4" to 5/16" in and a little better than a 1/2". The puller works great. Good luck

    Puller 1.JPG

    Puller 2.JPG

    puller 3.JPG
     
  8. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    I am assuming that when you say actuating lever you are talking about the pump by pass dump valve lever so you can push the machine if need be.
     
  9. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    No there is a "L" shaped Lever that you turn the pump on/off with. I got all the linkage disconnected. The lever has a nut on it which i have taken off. These darn parts are so espensive I don't want to break anything.
     
  10. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    OH, you are talking about the flow control lever on the bottom of the pump that has the linkage going up to the handles. One you remove the nut you will need a puller to pull it off. The arm is mounted on a tapered shaft that has a woodruf key in it. The key is small and is easy to lose. I use a bolt type ball joint separator like you use in the front end a car to get them off. I will post a picture of what I am talking about for you as soon as I find one. Speaking of pictures did you see the pulley remover pictures I posted?
     

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