J d 1010 crawler dozer blade won't lift 1964

Bigger mike · Jan 5, 2015

Have a john Deere 1964 1010 crawler - dozer with a 6 way blade. The blade won't lift at all, has proper fluid height. This machine is a new buy for us, any one have this happen? Any sheer pins? Everything else works as it should, just not the blade!!!

Stimw · Jan 5, 2015

My best guess is that a lift cylinder is blown and the fluid is going past the seals.
If you take one hose loose and try to move it, if it is bypassing fluid will come out the other side of the cylinder.
I have bought new cups (like in a wheel cylinder only bigger) for Clark forklift cylinders. They were blanks and I had to punch bolt holes in them.

Bigger mike · Jan 6, 2015

I thought that at first also, my bobcat and power traks have done that- and it just seems like a different issue, I will try what you suggested and go from there, thanks a ton, Mike

Stimw · Jan 6, 2015

Even if you have two cylinders if one is bypassing the other can't build pressure if the seal failure is bad enough. It can be deceiving.

Gordon Gould · Jan 7, 2015

Does the tilt and angle work ?? If they do then the best two choices are a cylinder like Stimw says or the valve spool. If a cylinder is bypassing it may, and I say may, be possible to feel that the bypassing cylinder gets warmer from the fluid passing through it.

You can remove the hose to the lift side of one cylinder and plug it with a cap or plug. If that cylinder was bypassing the other side should now lift. Try both sides. If you get no lift either side then suspect the valve spool or linkage unless both cylinders are bad.

Good luck.

Gordon Gould · Jan 7, 2015

I should have said one of the first things you should probably check is your pressure. Disconnext the two hoses off the cylinders put a meter on one hose end and a plug on the other. Then make sure you get pressure when you operate the valve. If you do, then do the cylinder test to see which is bad. If don't check else where, the control valve or your pressure relief valve or your pump.

Norm W · Jan 8, 2015

Check to see if the relief valve is not stuck open. Pull a valve against a stop and listen for a change in the sound of the pump. It doesn't take much to stick the relief valve open. Also check to see that the pump is actually pumping. There should be a good flow from the return line.

Bigger mike · Feb 22, 2015

Well! We found out what the issue was!!!! The gears in the pump came apart and sheared the input shaft into the pump. We took off the hoses and found no pressure. Took the front end off and removed pump and saw right away, splined shaft, clean break,. Solves that issue. My father is 74 years old and can't wrestle the blade around to angle it. So we are hatching a plan to install hydraulic cylinders on each side of the arms where they slide in and out. Has anybody done this yet? And how did it work? Thanks for looking!?,