Komatsu D31a-16

[Simon C]

Simon, I tested the cylinders as you said and no oil is leaking by. I then followed the procedure to reduce the length of the angle cylinders by opening the large bolt (I didn't know that was a bleeder) and the two square head bleeder bolts on both angle cylinders. I tilted right and angled left and right and the angle cylinders sucked all the way in when angling both left and right. Video Enclosed. Now, I can probably get them to retract even further but right now I have left and right tilt and left and right angle working fine. I might be able to get a little more left tilt but it's fine for now.

Now I have to put it to work to see if it's going to hold. But at least I know what to do if it needs adjustment in the field.

Thanks Again, Bob

Always good to test the cylinders first as no one can see inside a cylinder to see if something is by-passing. Pushing the rod out with fitting hose off also bleeds all the oil out of the rod end at the same time. Gives a better start to bleeding. No money spent other than a little oil and keep moving on.
Thanks for posting the last video.
Simon C

 

[Simon C]

I can probably get more left tilt but at least I can get to work with this thing now. After the angle cylinder adjustments. That's my wife on the machine. Thanks Simon

Sometimes because of a cylinders set-up the only way you can get all the air out is by disconnecting the rod end allowing the rod to stroke both ways full distance while fittings are loose, one at a time to get air out.
Simon C

 

[Jeffz33]

I just fixed mine with same issue, on the right side c frame is a junction block on the side of the junction block there is a plug that I think is 30mm. Loosen this plug but don’t remove it, it’ll be 5-6 turns out. Lift blade with engine running angle blade all the way right once it’s right tilt blade to left. The blade won’t move just the cam arm. Depending on how bad it’s out you may need to do this twice. Once blade cams all the way left. Tighten that plug, and reset blade to center. Measure pin to pin on BOTH cylinders the sum of both measures should be 68.5-70”. If they’re not do again.

 

[ljmartin]

Does anyone have the part number for the tilt link that bends?

 

[epirbalex]

Does anyone have the part number for the tilt link that bends?

Probably can find it , can you show a picture of it and the Dozer model number

 

[ljmartin]

Model# D31-16. Serial# 25555. I can't seem to get a picture to attach. It's the link that comes off the top of the blade and hooks to the tilt cylinder link.
Thank you