Egon
Epic Contributor
Any chance you could find a spring of the same diameter and rate that could be cut down. Industrial suppliers may have one??
FEL strong but Backhoe Weak... What would cause this? VIDEO
- Thread starter parluskq
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Now that the weather isn't -12 and snow i was able to look more into my problem. If i leave the front bucket off of the ground and not under any pressure the backhoe is much more stronger and able to dig, but if i put downward pressure on the front bucket the power goes away. I am still able to move the BH and it has power, but not enough to do much with, and kicks the relief valve pretty easily. I also removed the broken piece of the spring and put a nut about the same size as the broken piece in its place.
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
What you are saying is absolutely true, and is to be expected in an open center hyd system.
The first valve in the flow path has priority, and can take all flow from the next valve.
If the loader is only used half flow, then the BH will get the other half.
When using the BH only, you get full pump flow.
The first valve in the flow path has priority, and can take all flow from the next valve.
If the loader is only used half flow, then the BH will get the other half.
When using the BH only, you get full pump flow.
I am a little confused, I thought even in an open system once i lift the front end off the ground using the bucket and am not touching the controls, it shut off pressure to the cylinders. But what you are saying is that there is constant pressure being sent to those cylinders, even if the valve is not being pushed? I will try and make a video tomorrow, it is hard to explain by writing.
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
I never said there was flow to the cyl with the valve in neutral.
When you lower the bucket and raise the front wheels off the ground, and release the levers, that is a done deal.
If those cyl are good, the machine should stay in that position.
One your cyls are set, the the loader relief is separate from the lift and curl.
The relief is still usable if it is the first relief in the hyd circuit, and protects the pump for any downstream operation such as the BH.
You should have full pump flow and pressure to the BH.
A flow and pressure test will tell you a lot about your hyd system.
It involves a flow meter, pressure gauge, relief valve and needle valve.
Your relief setting on the BH should be the same or higher than the loader relief valve.
When you lower the bucket and raise the front wheels off the ground, and release the levers, that is a done deal.
If those cyl are good, the machine should stay in that position.
One your cyls are set, the the loader relief is separate from the lift and curl.
The relief is still usable if it is the first relief in the hyd circuit, and protects the pump for any downstream operation such as the BH.
You should have full pump flow and pressure to the BH.
A flow and pressure test will tell you a lot about your hyd system.
It involves a flow meter, pressure gauge, relief valve and needle valve.
Your relief setting on the BH should be the same or higher than the loader relief valve.
I was a little confused, thanks for clarifying. The relief is the first and only relief in the system. I called around today and could not find anyone that could do a flow test. You would think in the town where i live (a coal mining town) someone could. I have a pressure gauge that I can hook up and take some measurements. As far as i know the front cylinders are good. They never leak down or drift. When I get some more time I am going to do some more testing on the relief valve and cylinders. Something has to be leaking somewhere internally, I would imagine. Thanks again J_J you have been a wealth of knowledge and help.