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D3B Clutch and cylinder rebuild

Discussion in 'Dozers' started by AllDodge, Oct 29, 2019.

  1. AllDodge

    AllDodge Senior Member

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    Decided to get into removing the clutches, and while I'm at it need to have the lift cylinders rebuilt.

    Drained the hydraulics, then removed the seat, battery and down to the hydraulics and linkage. The good think is most things are 9/16 of 3/4, the bad, is some of the 9/16 bolts have very little room and can only use the short wrench. Did manage to lock 2 wrenches together to get me some more leverage

    D3 1.jpg D3 2.jpg D3 3.jpg D3 4.jpg .
     
    Last edited: Oct 29, 2019
    DMiller likes this.
  2. AllDodge

    AllDodge Senior Member

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    As others have said, its best to get everything out of the way, but I had to try and do some without removing all. Still need to drain the lube, and have already dropped wrenches and had to retrieve. Doesn't look like the piston moves the arm much at all, maybe 1 inch at most. The break band looks brand new (never saw a new one) because there is a good 1/4 to 3/8 pad on it
    D3 6.jpg D3 7.jpg D3 8.jpg D3 10.jpg
     
    Last edited: Oct 29, 2019
  3. AllDodge

    AllDodge Senior Member

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    Removed lines and the front pin came out easy, but neither of the rear pins wants to move. Have remove the bolt which does thru the back side. May be another one of those need lots of heat

    cylinder pin.jpg
     
  4. AllDodge

    AllDodge Senior Member

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    What kind of tool(s) would be used to gain leverage on smaller bolts removal? Just looking at the 9/16 on the clutch cylinder, space is limited
     
  5. AllDodge

    AllDodge Senior Member

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    Looking at the manual for clutch rebuild and I can see right now I don't have the tools for it. May be able to figure something out, but right now still need to get them out.

    The bolts on both sides have very little room to get a wrench on them, except for the outside ones by removing a plug so a socket can be used. The issue with both is the machine needs to be moved FWD/REV to gain access to each bolt.

    The ones on the inside can only be turned by using a straight 3/4 wrench. The boxed end has to be straight because even a slight normal angle of the standard wrench reduces the available room

    Anyone have any suggestions?
     
  6. AllDodge

    AllDodge Senior Member

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    Both panels off

    D3 12.jpg

    Cylinder and brake band bracket removed

    D3 13.jpg
     
  7. AllDodge

    AllDodge Senior Member

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    Got the left side brake band disconnected, now need to lift the blade and chain it off the ground. Removed the outside plugs with 3/4 impact to get and outside bolts. Need my backhoe to move the dozer fwd/rev to loosen all the bolts. Problem is I loaned the BH to a friend and now the battery's are dead, so have to go get 2 new bats.

    Two of the bolts snapped off on the left side cylinder. Oh goody more fun

    D3 16.jpg
     
  8. AllDodge

    AllDodge Senior Member

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    Quote from CAT for 100% replace disk and plates is $1375 each side (parts 525, labor 850). Would be less if plates can be reused, I doubt it, but hope to find a way to get it done cheaper
     
  9. Old Magnet

    Old Magnet Senior Member

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  10. AllDodge

    AllDodge Senior Member

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    Thanks will have a look. Maybe once I get them out I might be able to figure out how to rebuild myself. Looking at the manual I'm just not sure I have the tools to do the deed, but will see
     
  11. sled dog

    sled dog Well-Known Member

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    I use a hydraulic jack under a track pad grouser to move forward or back. Moves slow, so you can put it right where you want it. Either at the sprocket, or the idler.
     
  12. Welder Dave

    Welder Dave Senior Member

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    That doesn't seem like a bad price. I had the steering clutches rebuilt in my 931B with dry clutches and it was close to $3500 a side CAD!
     
  13. AllDodge

    AllDodge Senior Member

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    That sounds like a good idea, I was thinking of using my backhoe, but a jack will do it slower.

    Will use the backhoe to pic the blade up and then chain off to keep it off the ground. I've going to try and use a pipe wrench on the lift cylinders nut then just take the rod in for rebuild. Waiting on buddy which has a 4 footer that will let me use it
     
    sled dog likes this.
  14. AllDodge

    AllDodge Senior Member

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    I guess its not really that bad, and not taking into account what my time is worth, and way past what the dozer is worth by now.
    Bought $4500
    Motor rebuild $6500
    Clutches $2750
    Cylinders $200 guessing and could probably do my self, just getting the nut off/on the end maybe
    Misc $300
    Total 14,250 and I have a good dozer, just guessing thats about all its worth
     
  15. Welder Dave

    Welder Dave Senior Member

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    What's the undercarriage like? That probably determines value more than anything but if it is better than 50% and the rest is repaired it, I'd think it would be around a 20K dozer.
     
  16. AllDodge

    AllDodge Senior Member

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    The undercarriage is at least 80% if not closer to 100. Would need to know the specs, but sprockets, pads, grousers all look great.

    Oh forgot, also going to replace some hydraulic lines, so there is more money. They are not leaking but real old and brittle
     
  17. AllDodge

    AllDodge Senior Member

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    Hey sled dog, the manual states to keep two bolts in spaced across then remove when lifting out. My question is there is very little room and just how is it possible, or more so how did you remove yours?
     
  18. sled dog

    sled dog Well-Known Member

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    I'm not sure what you're asking. I take all the bolts out, bevel gear side, and final side. Sling around the hardware on the top of the brake band, then lift it out
     
  19. sled dog

    sled dog Well-Known Member

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    Cat actually has straight box end steering clutch wrenches...
     
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  20. AllDodge

    AllDodge Senior Member

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    I have several 3/4 wrenches, I can heat one up and straighten it out

    The bolt thing is written in the manual, but figured just keep removing bolts until there all out and lift. I'll get it done, just going to take me longer