Hey guys, i bought a B2620 last summer with the backhoe. I ran it right away with out issues that i could notice. Had disconnected hoe for couple of months in dry storage. Ever since I seem to have issues. Hydraulic connectors have been changed, its been at the dealership formonths. The problem is when i try to raise the boom while running dipper/bucket the boom completely stops raising. Dealer just told me that the boom will stop while curling bucket. Umm....the whole point in running a backhoe is that you should be able to run all functions at once smoothly, right? I never noticed this while it was attached from new, only after it was disconnected. Anybody have some insight? Gotta say Im dissapointed. Thanks guys.
BH65 operations
- Thread starter ljmichl78
- Start date
Bx25 and the bh65 do the same thing. I expected that on the BX25, but not on the bh65. 1 function will take precedent over the other.
When I bought the B3200 with the bh77, I found that I could use 2 functions at the same time.
Your bh65 is a strong backhoe. I did a lot of work with my b2620 and bh65 on my property.
When I bought the B3200 with the bh77, I found that I could use 2 functions at the same time.
Your bh65 is a strong backhoe. I did a lot of work with my b2620 and bh65 on my property.
Only one little problem.....it is NEVER consistant! Sometimes it will run 15 minutes before boom stops. Sometimes it only run for 5 minutes. If this is how they run, why isnt it consistant?
just guessing here , but what you explain does not seem right to me as the boom and dipper need to work in unison to be affective . I have a little b670 BH and both work together to dig a straite bottom trench , that said playing /working on my lil 670 ,I Would GUESS the problem lies in the main valve/spool assembly (where the control handles are) mine are a line of single spool chambers bolted together with 80 dollars worth of seals and o ring in each spool x 6, I would think if ONE flow thru passage got pluged or restricted then multi spool operation would be affected , JUST GUESSING HERE as Im dealing with a bad or dirty spool on my lil' 670 BH and am weighting rebuilding or replacing the MOST EXPENSIVE and complicated part on the BH ... 6x80.00 to rebuild or 1x1200.00 yes 1200.00 to replace (kabota price) . this is when I wish I new more about Hydraulics !
good luck and hope you can find a compitant service tech to help with that problem ...
PS have you down loaded a scamatic or the main valve ass. , very helpful as you should be able to see the pass thru cavities in each spool chamber that allows muti spool use , on mine the are three pass thru ports...Jerr
good luck and hope you can find a compitant service tech to help with that problem ...
PS have you down loaded a scamatic or the main valve ass. , very helpful as you should be able to see the pass thru cavities in each spool chamber that allows muti spool use , on mine the are three pass thru ports...Jerr
Lil Foot
Well-known member
Lifetime Member
Equipment
1979 B7100DT Gear, Nissan Hanix N150-2 Excavator
WTF?
I rebuilt the control valve for my B670 for less than $11.00, didn't need any hard parts, just o-rings & cleaning.
http://www.orangetractortalks.com/forums/showthread.php?t=5482&highlight=b670+rebuild
the seal kit as listed is 70020-00753 80.00 I even called CS cause I thought it was a misprint , and was told Just seals ,o rings & mylar seals , I about choked ,and that's just 1 spool need six ...
SOOO lilfoot that brings us to your rebuild , you say you replaced o rings and cleaned spools , where did you get the orings and expand on cleaning the spools , please as I did not find info in your very good blog on your 670 rebuild ?
Ps mine is not leaking ,but do have a weak dipper spool that is buzzing under lode ,like going down to the relief valve by the filter .
sorry did not mean to hijack.. Jerr
SOOO lilfoot that brings us to your rebuild , you say you replaced o rings and cleaned spools , where did you get the orings and expand on cleaning the spools , please as I did not find info in your very good blog on your 670 rebuild ?
Ps mine is not leaking ,but do have a weak dipper spool that is buzzing under lode ,like going down to the relief valve by the filter .
sorry did not mean to hijack.. Jerr
Lil Foot
Well-known member
Lifetime Member
Equipment
1979 B7100DT Gear, Nissan Hanix N150-2 Excavator
Got the tractor back...dealer says he full stroked boom and dipper without issues. I tried it out today, they do work but not all full stroke. The boom comes up when im using the dipper but thats just the grounds resistance. If i lay the boom and dipper out flat and full stroke boom then full stroke the dipper boom once again stops. Ive got an 8 min video i could try to upload.
BAP
Well-known member
Lifetime Member
Equipment
2012 Kubota 2920, 60MMM, FEL, BH65 48" Bush Hog, 60"Backblade, B2782B Snowblower
Does the tractor have enough hydraulic oil? Have you changed the hydraulic filter and checked the intake screen. Sounds like it is not getting enough oil.
Filter was changed and re topped off before he took tractor back the second time. Right around 50 hours.
Any help on not being able to full stroke boom and dipper? Boom works if i let off full on dipper but shouldnt both be able to function the same time?
Any help on not being able to full stroke boom and dipper? Boom works if i let off full on dipper but shouldnt both be able to function the same time?
I'm not sure about the BH 65 but My BH 77 does multifunction operation. I would think Yours would too. Just incase some one else can answer better though at least this will bump the thread to the top.
My little 619B BH can do multi-function without a problem, at least when it was working a few month back.
I have a 2 year old B3300SU and BH-77 hoe with 175 hours. When it was new you could use boom, dipper and bucket all together in unison. The issues described above seems very similar to what I have been expirencing for the past 50 or so hours except in my case it is only the dipper that randomly and occasionally stops working when it sees any resistance pulling. Everything else works fine. I thought it thru and with everything else working as it should the only logical thing it could be (to me) is a problem with the relief or unloader valve for the dipper control on the backhoe. I removed the panel to expose the valve bank to confirm that all of the mechanical mechanism was working as it should. I have also taken both relief valves off for the dipper and took them apart to see if I could see a problem with them, saw nothing there but I don't know anything about them either.
Mine acts up with no load at all. If i lay boom and dipper out flat and start full stroke on boom to lift, as soon as dipper hits full stroke boom stops completely. If i let off dipper and feather it, the boom starts coming up again. Fluid/filter are full/changed, no chattering in hydraulics ever, as to say it is low on fluid.
I have a B2620 with BH65. I was having what sounds like the same problem as you but it was with the dump/curl on front loader not the backhoe. It just randomly began acting up. It would work just fine for a few minutes, then it would suddenly dump/curl increasingly slowly until it pretty much stopped all together. All other functions were fine.
I took it to the dealer and they did multiple tests and ended up replacing the spool valve on the loader under warranty since I had like 30 hours on it.
The only other thing to check would be as someone else mentioned, make sure the pump isn't going into bypass for some reason. It will do that when the hydraulics reach a certain psi. So make sure your 3 point is free floating and take the pressure off the front loader rams, just let it sit on the ground.
I would venture to guess it's your spool valve on the backhoe.
Also, my BH65 will do 2 functions at once with no problem. It slows down to about half speed with 3 functions but still very useable. Just fyi.
I took it to the dealer and they did multiple tests and ended up replacing the spool valve on the loader under warranty since I had like 30 hours on it.
The only other thing to check would be as someone else mentioned, make sure the pump isn't going into bypass for some reason. It will do that when the hydraulics reach a certain psi. So make sure your 3 point is free floating and take the pressure off the front loader rams, just let it sit on the ground.
I would venture to guess it's your spool valve on the backhoe.
Also, my BH65 will do 2 functions at once with no problem. It slows down to about half speed with 3 functions but still very useable. Just fyi.
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3 point is always down, but when i use the backhoe i put down pressure to help hold it still while digging. It can do 3 functions as long as im not full stroking the dipper all the way. Everything runs the same way everytime, i had always put some down pressure with loader. Not sure why that would affect the hoe functions when rams are in with loader down.
Mine also occasionally acts up with no load. It also occasionally has the jitters like low on fluid but all the time it's always the same function,, pulling with the dipper. I swapped places with the upper dipper relief valve with the upper boom valve and now I have boom out issues so I'm guessing I have a bad relief valve. The problems seem to only happen when the oil gets hot so I'm guessing the valve has tolerance issues. I'll have to quiz the dealer on this. Bet the answer will be " never heard of this"