Xfaxman
Super Star Member
- Joined
- Feb 8, 2013
- Messages
- 12,889
- Location
- Guthrie, OK
- Tractor
- Toolcat 5610 G - Bobcat V417 - TORO+Loader
Did it work before you cleaned the filter changed the fluid?
Yes it was connected until I pulled the entire side cover. Not sure if this is my problem but here is a pic of the relief valve on my tractor. Everything I read in the manual as well as your picture says I should have a relief valve pictured as you've shown however, mine looks like the one attached with a large bolt on the end instead of a cap and screw.
JC-jetro
Elite Member
That is a type the pressure is adjusted by adding or subtracting shim to change spring stiffness causing new hyd pressure setting. Try to answer question I asked on feed back arm.
JC,
JC-jetro
Elite Member
although it is a rare occurrence but your spool valve might be faulty. Has this thing ever worked? did you have 3 point movement prior to oil change? with the cylinder head removed and engine on did you try to manipulate the lift arm handle? anything happened then ? did you here relif rattling onec you lifted the arm all the way up as far as you can move it?
JC,
According to the previous owner it worked fine until he changed a bent axle then it quit all together. It sat for 3 years until I purchased it in non running condition but a hot battery took care of that. I have yet to get any movement from the 3 pt at all before or after fluid change. With the engine on and cylinder head removed I get fluid from the top flowing back into the diff no matter what the position of the handle maybe. No rattling when the arm is all the way up.
JC-jetro
Elite Member
Ok. when you removed the head then there is a passage way and an o-ring that transfers oil to the head and thru a needle valve to lift piston. are you saying that nothing came out of that hole and all was transferred to diffy internally? right?
Two things can prevent that from happening,
1- less likely issue with spool vlave with blow out seal that or somehow stuck in neutral position (transferring un-used oil back to diffy)
2-Your relif device is stock open . More likely.
I suggest to you to remove the nut from relief device and inspect shims, and spring, run the tractor to see if oil come out of that hole. take a bucket to avoid mess on the floor. I hope you have some dirt that stuck in there and keeping the valve open. (same as kidney stone). Clean the seat of the poppet valve for the relief and put back together. start tractor and see raise and lower the arm to see if any oil come s out of the hole on the lift cover hole lining up with the hole on cylinder head.
Try it and report back.
JC,
Two things can prevent that from happening,
1- less likely issue with spool vlave with blow out seal that or somehow stuck in neutral position (transferring un-used oil back to diffy)
2-Your relif device is stock open . More likely.
I suggest to you to remove the nut from relief device and inspect shims, and spring, run the tractor to see if oil come out of that hole. take a bucket to avoid mess on the floor. I hope you have some dirt that stuck in there and keeping the valve open. (same as kidney stone). Clean the seat of the poppet valve for the relief and put back together. start tractor and see raise and lower the arm to see if any oil come s out of the hole on the lift cover hole lining up with the hole on cylinder head.
Try it and report back.
JC,
JC-jetro
Elite Member
Yes , that is the spool valve. the hole on the top might be relief port when the spool is pushed to normal position by action of feed back arm. I have not opened mine, did not need to bu there are I belive two spools, two highly polished shaft with some oring that direct the flow to three point cylinder head/piston and unused portion of the hyd oil back to diffy. Your hyd is constantly pumping hence live hydraulics.
Do what I suggested earlier before you get in to the spool, you do not want to damage the innards if it still good. Eliminate one item at a time from small to big.
Jc,
