How to plumb in the hydraulics

[JerryRigger]

I have just purchased a Mitsubishi 2000 and have just finished designing a loader for it. I have purchased my high pressure cylinders and Prince loader valve from Northern Tool. My experience in hydraulics limited however I think I have most of the design figured out except for how to tie into the hydraulic system of the tractor. The pump in front of the motor has no visible input or output fittings. I see several pipe plugs in the rear under the seat. I am assuming the large line from the pump is the return and the small line is the high pressure. Can I just splice into those lines? I am not concerned about quick disconnects, the loader will not be removed.

I have attached a jpg of my loader design. Any advice or criticism would be greatly appreciated.

Thanks for any help.

 

[blackd]

Just assure that the front arms are sized for the bucket to come down @ 12-15" in front of the bumper. Too long and it unloads the rear tires with just a little weight.

 

[MarkStewart]

Hi, I installed mine like pictured on web page Hoye tractor's website. I went to a local hydraulic shop and bought the fittings that I needed. They just need to know what size your lines are and they can help you. picture of fittings

 

[RonMar]

You might consider using two weld on tabs at each cylinder/frame junction instead of the single tabs pictured in your design. This has a few benefits:

1. Allows the use of thinner material for the tabs. Easier to fabricate, less expensive material, but you do need twice as many.

2. Moves the strain point from the middle of the frame tube face out near the edges. Concrentating a force at the middle of a tube face could cause it to deform and lead to a structural failure. Two tabs alow this force to be applied to the edge of the tube sides which is a much stronger arrangement. Depending on the tube used, you may also be able to weld the tabs to the side faces with an overlapping joint which is stronger than the butt joint used on the single tab design. Even if both tabs were welded with a butt joint, the weld surface area would be nearly double that of the single tab making it much stronger.
3. The use of a single tab can allow the cylinder to move in more than the designed axis, especially as the single center tab becomes worn. Under load, this can lead to excessive cylinder and seal wear and in the worst case, a cylinder collapse(fold/bend). A tab on either side of the clevis attachpoint will restrict movement in all but the intended axis.

The clevis on the cylinder may be set up for a single tab in the middle, but it works just fine with a tab plate on either side. How many production loaders out there are using a single tab for the cylinder attach points?

 

[Soundguy]

if your pump only has 2 lines.. figure one as feed, the other pressure.. look for returns / bypasses at the control valving.. etc.

Soundguy

 

[Slamfire]

If your 2000 looks anything like my 1800 you'll need some kind of subframe to connect the loader arms too. Frameless tractors break at the junction of the engine/bellhousing from the strain. /forums/images/graemlins/tongue.gif

 

[JerryRigger]

Thanks for all the info. I'm am now very concerned by Slamfire's remarks. I'm just planning on moving dirt around. Should I be concerned if I'm not planning on using it as a battering ram on trees? Does this look like your D1800 Slam?

 

[MarkStewart]

Here's one with a koyker loader installed. Maybe you could copy their design or buy an installation kit and adapt it to your machine? I don't think this one is equipped with a subframe... d2000
Here's a pic of mounting bracket from efc's site. looks like it bolts to four holes on engine block frame? and 3 holes in bell housing. bracket

 

[Soundguy]

</font><font color="blue" class="small">( Frameless tractors break at the junction of the engine/bellhousing from the strain. )</font>

Did you mean that to include all tractors? Though I have no exp with yanmar and loaders.. I've never seen an old ford broke in half from a front end loader..and those are framless tractors for the most part... ( backhoe breaks.. yes.. loader breaks? just havn't seen them.. )

Soundguy

 

[Slamfire]

Yes, just like that! All tractors, soundguy, who'd ever say always or never.?