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08-09-2012, 12:41 PM #151
- Join Date
- Feb 2005
- Edgewood, NM USA
- Jinma 354, Ford 1953 NAA Golden Jubilee, Komatsu Bulldozer
Re: Komatsu D20A-6 ?
Yes you can put a valve in series, I did just that to operate my log splitter, dump trailer and future ripper. I also plan on some sort of future TPH arrangement as well. See post 89 on page 9 of this thread.
What you need to do is place a valve in series between the output of the pump and the input of the OEM control valve. One of the large steel lines will have to be removed from the valve that goes to the pump. It's a little hard to get to, but do-able. The seat, seat plate, and floor plate will need to be removed. You have to find a hydraulic shop that can make hoses with 30* JIS (Japanese industrial Standard not JIC) 22 mm dia x 1.5 mm thread pitch metric female (Japanese Komatsu) Metric thread fitting on one end and whatever fitting you need for the new valve on the other. Use at least 5/8" ID hose and a good at least 20 GPM rated valve and you wont have any problems.
LarryMy Fortune cookies:
If you have to ask if you can do something, you probably can't.
Life is short, especially if you forget to wake up the next day.
He who hurries wastes time.
If you must select between two evils, choose the one you haven't tried before.
Tractor hydraulics is not rocket science.