Hydraulic problem.. I'm stumped

[winston1]

looking at my loader spool valves i dont see a relief valve, so i plan on changing the sanyo 2 gang valve out with something like this

amazon spool valve link with built in adjustable relief valve. this way i can have a spare port used for dump trailer hydraulics etc..

in recent past, i have added a metric washer to my relief valve spring in the 3 point to increase the pressure available to the loader being that it would bypass when trying to pick up a full bucket of dirt (the bucket is only 27 inches wide) when i replace the spool valves on the loader and change the plumbing as you suggested, i might be removing the washer in the relief valve. honestly, when it was bypassing, it wasnt making the typical noise you would expect from a hydraulic bypass valve.

i found this kit for the pump line, Yanmar Tractor Hydraulic Pipe Replacement Kit

i have the banjo fittings, and am probably gonna make the adapter at work and save a few dollars lol...

it is a pretty simple piece, 2 o-ring lands, a center tapped hole, and 2 through holes lol.. i will probably make mine with recessed socket head allen bolts so that positioning the #8 swivel fitting is easier.

any input you may have will be much appreciated. you have been a massive help in figuring out this little tractor. i grew up on a tiny farm, but we never had tractors, we either used a mule or one of the neighbors would barter services with us.

i work in industrial maintenance so i am familiar with hydraulics, mechanics and electrical, just not the intricacies of the tractors lol.

i plan to make a grab attachment to replace my bucket, but that will be a little down the road lol.. .

EDIT looking like i may add a 2 valve for the rear attachments separate and replace the 2 valve setup on the loader with the 2 valve..

I suppose it is possible your loader valve does not have a relief valve but I thought that was normal. Sounds to me you probably know more than me on hydraulics. Keep us informed on your progress. That kit is the original Hoye kit.

 

[grumbolt]

the more i look at it, it looks like someone pieced together an install kit from parts they happened to have.

thanks to the manual you provided i can make a lot more sense of what is going on with it lol..

the loader is definitely powered from the "b" port currently which means the stop valve has to be fully closed or the arms fully up for the loader to function, and the loader is utilizing the existing relief valve located in the stop valve assembly.

the photos show current setup. that little screw on the left of the valve closest to the outside is just a stop to control how far the lever can be pushed forward therefore controlling the speed of the dump function of the bucket.
the orange handled ball valve is the one that has to be closed for the rear arms to operate.


i will be changing the front spool valves out with a 3 position (2 for existing functions, extra port for little hydraulic winch or attachment accessory on the front) and adding a 2 position valve to the rear to control rear mounted accessories (dump trailer, log splitter etc)

the dual valve for the rear will be later down the road, as i havent built a log splitter or dump trailer as of yet.

ill post pics when i make the changes. again, thanks very much for all your help!

 

[grumbolt]

I suppose it is possible your loader valve does not have a relief valve but I thought that was normal. Sounds to me you probably know more than me on hydraulics. Keep us informed on your progress. That kit is the original Hoye kit.

looking around, i found the adapter very inexpensive.. Hydraulic Pump Adapter - Pump to Flex House i cant build this cheaper if i factor in my time..


this part along with the hose, and the jic fittings and a 18mm banjo to an6 jic adapter will do what the expensive kit will do, at a fraction of the price..

i am posting this here for others who may be looking for the same info i was

if you are in a hurry for that above adapter, amazon has it for 35$ Amazon.com: Hydraulic Pump Adapter - Pump to Flex House : Patio, Lawn & Garden

looking like i just need to make up my hoses and buy these parts and ill be all set!

 

[winston1]

looking around, i found the adapter very inexpensive.. Hydraulic Pump Adapter - Pump to Flex House i cant build this cheaper if i factor in my time..


this part along with the hose, and the jic fittings and a 18mm banjo to an6 jic adapter will do what the expensive kit will do, at a fraction of the price..

i am posting this here for others who may be looking for the same info i was

if you are in a hurry for that above adapter, amazon has it for 35$ Amazon.com: Hydraulic Pump Adapter - Pump to Flex House : Patio, Lawn & Garden

looking like i just need to make up my hoses and buy these parts and ill be all set!

Those adapters also originated with Hoye tractor and same seller selling on Amazon. Also find them at Brand M. Yanmar YM1500 / YM1500D Hydraulic Parts