d-15 series 2 loader bucket conversion

mgmm

New User
hello I have a trip bucket on my d-15 and would like to convert to full hydraulic I purchased the 2 way spool at a auction (hopefully good) and I would like to find out how to plumb this on my tractor any ideas? thx in advance
 
Most D-15's that have an all-hydraulic loader have a crankshaft driven front hydraulic pump. It is a separate hydraulic system, utilizing an oil tank inside the loader frame tower on one side. This system is "live" and works whenever the engine is running. Your current hydraulic pump is dead when you push in the foot clutch. Not saying it won't work, but isn't as handy. Also, your current hydraulic cylinders are probably high pressure cylinders made specifically for your 3700 psi hydraulic pump. When you connect that 2-way valve you just bought, it is going to be 2,000 to 2,200 psi relief pressure, so your maximum lifting power will be diminished somewhat, unless you change to low pressure cylinders.. I'm not saying I know you have high pressure lift cylinders, but I'm saying that's what they should be, unless someone has grafted a loader onto your tractor with low pressure cylinders.
 
a lot of spools can be adjusted up to 3000psi. This would help. You also have the power director to aid in have almost live hydraulics. You would have to connect to you rear coupler and plumb a return back to the reservoir.
Your pump would not put out enough GPM to use low pressure cylinders. Therefor a front mounted pump would be required.
LOL Bob
 
Here"s my aux setup on the D17. Feeds a single valve that I use on a rock wagon hoist. Relief valve cuts pressure down to about 1500psi so I don"t blow the cyl out, but volume is obviously slower than usual. Also operates two-way cyl.
IMG_7065.jpg
 
Every hydraulic pump/hydraulic system has to have a relief valve to pop-off at a specific maximum pressure. If there were no relief valve, hoses and hydraulic cylinders would explode when a cylinder reached the each of its stroke and bottomed out OR you picked up something that was too heavy. Your D-15's internal hydraulic pump was set for a maximum of 3,700 psi when it was new. It has probably settled down some with age, but is probably still 3,000 psi plus. When using a high-pressure/low volume system like this, the cylinders were smaller in diameter and also rugged enough to take the pressure. A low-pressure system cylinder is larger in diameter and takes a larger volume (GPM) pump to operate with the same speed/cycle time as the high-pressure system. The hydraulic valve stack you have purchased probably has an adjustable relief valve built into it, that is set for 2,200 or so psi. To adjust it to 3,000 psi?? I don't know if you can....maybe....maybe not. If it has one, it's usually got an acorn nut that needs to be removed to adjust it to a lower or higher pressure setting.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top