So.... my front end loader on my bx2670 is wonky. When I first start to raise bucket, it falls instead of raising. Only when I pull all the way back does it start to go up... and really only if RPMs are high. Otherwise, it just falls. If I release to the neutral position, it will stop falling. But if I slightly start to raise it, it resumes falling. I don't think its the cylinders because bucket doesn't fall when left overnight. Sounds like a control valve issue and apparently, they cost a fortune! Any ideas. I apologize in advance if my question displays my ignorance!
Front end loader issues bx2670
- Thread starter jmcmul2
- Start date
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
RCW
Well-known member
Lifetime Member
Equipment
BX2360, FEL, MMM, BX2750D snowblower. 1953 Minneapolis Moline ZAU
Just for giggles, put the 3 point hitch all the way down.
You’re also complaining about some engine issues in another thread.
What’s the service history of the tractor?
Number of hours, last services, etc.?
You’re also complaining about some engine issues in another thread.
What’s the service history of the tractor?
Number of hours, last services, etc.?
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
TheOldHokie
Well-known member
Lifetime Member
Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Sounds like the load check valve in the loader valve is not working. May be a broken spring, stuck open, or jammed with some flotsam. Its item number 40 in the parts diagram but it appears the kit is NLA. I suggest you disassemble, clean, and inspect. Maybe you will get lucky and thats all it takes.
Dan
Checked linkage, all looks ok. Of course, I really don't know what it is supposed to look like! Both up/down and curl have a little bit of play/wiggle before they do anything. Seems reasonable.....
Yes, thought it would be simpler to have two threads instead of confusing the discussion. Tractor has 930 hours and I have changed filters and bodily fluids at recommended intervals or more often. Tractor has never been in the shop.
Update on hydraulic issue. Got a test gauge to put on the hose quick connects. Both the lift AND bucket tilt leak pressure, slowly. Each tested separately with all hoses disconnected which eliminates leaky cylinders as the problem. And by the way, relief pressure is around 1700 psi so it is low a bit.
I assume that since there are two check valves on the main hydraulic valve that if one were leaking, only one side would bleed off pressure? Please let me know if I am wrong because I would love to be able to fix issue by the easy repair of check valves. The odds of both check valves leaking at the same time seems obviously low.
So that leads me to the relief valve, another relatively easy fix. If it were leaking, both sides would bleed pressure. I am going to price a new valve at Kubota next week. Any opinions of the chance of that fixing my problem?
There is one check valve for each circuit, boom and bucket, not side to side. The cylinders are in parallel, both boom and both bucket are controlled by their respective valve. So one leaking valve would affect that function.
Have you cleaned and checked them? Unlike some, yours are easily accessible.
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
The relief valve has zero effect on it holding pressure.
I'm really not understanding your pressure measuring methodology?
If you put a pressure gauge on just the valve side you will get leak down, that's inevitable, the valves are not sealed that tight.
Have you pulled the check valves and inspected them?
Not sure you answered my question.... the two sides are independent and a failure on one should not affect the other? If this is correct, not likely that both would have troubles at the same time?
I don't know why you're resisting such an easy procedure. The two check valves are highlighted in blue on this diagram. One for the boom, one for the bucket curl.
Firstly, I don't really understand why there is a reluctance to answer a simple question. But the flow diagram does in fact confirm two systems are indepent.
As to my "reluctance" to remove and inspect check valves. After screwing so many things up that were supposed to be simple in my 70 years, I have made it a policy to "not fix anything that is not broke." It would be like me to break off the bolt or cross the threads. And the fix also requires a removal of at least one hydraulic line, if not two. Not as simple as it seems at first blush.....
As to my "reluctance" to remove and inspect check valves. After screwing so many things up that were supposed to be simple in my 70 years, I have made it a policy to "not fix anything that is not broke." It would be like me to break off the bolt or cross the threads. And the fix also requires a removal of at least one hydraulic line, if not two. Not as simple as it seems at first blush.....