GuglioLS
Veteran Member
- Joined
- Feb 13, 2005
- Messages
- 1,143
- Location
- Edgewood, NM USA
- Tractor
- Jinma 354, 1953 Ford NAA Golden Jubilee, Komatsu Bulldozer
Does anyone know if the hydraulic system on a D20a-5 is stackable i.e. can I add another hydraulic circuit to the system? I want to make a 3 point hitch to the back of my dozer and this would be the easiest way to do it. I want to be able use some of my 3 poin tools and make a ripper attachment also. Any ideas/help would be greatly appreciated
John,
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.
http://www.tractorbynet.com/forums/construction-equipment/99717-komatsu-d20a-6-a-9.html#post1246392
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.
Larry