B8200 Hydraulic Problems

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Hi everyone, new to the forum. Spoke to Vick briefly and he did point me in the direction i needed but it's sill not resolved. I need help bad and been losing it trying to figure out on my own. I bought a used B8200 with backhoe and fel. It's pretty beat up but i'm fixing things as i can. The loader did work when i bought it but there were leakes all over the place on the backhoe which is PTO driven. Replaced all seals on cylinders and new hoses. The loader worked before this but i know it was really slow. Then the fel just stopped working After fixing backhoe i changed the hydraulic fluid and man was it milky. Drained and filled 4 times before i got clear hydraulic fluid. I clean the filter screen each time and blowing air through it every time. Heres the problem. The loader does not work at all and there isn't any hydraulic oil coming out of the hose that feeds the fel.
I took the pump off as Vick directed me to. It looks clean with no visual damage at all. I checked the pump by putting my thumb on the top (suction) and finger on bottom (return) and turned the tab that goes into the gear from the pump and i have suction. I turned the motor over with pump off and saw that the gear is turning. I looked very closely at connections and hoses back to hydraulic tank and do not see any leaks. By the way it is a gear driven ran transmission. The PTO works, The three point lifts. I'm stumped. Please please give me some advise. Is it air? how do i get it out. Is it the pump. I did buy another relief valve hoping that was stuck but it didn't help. How do i prime the pump?.Losing my mind on this and tired of wearing hydraulic fluid. Sorry for the long post but wanted to give as much info as i can. Thanks
 

North Idaho Wolfman

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Then the fel just stopped working After fixing backhoe i changed the hydraulic fluid and man was it milky.
This statement make me think you have a problem with a suction line to the pump, it's pulling in air and whipping the hydraulic fluid.

Suction lines won't leak when they are bad, they will just collapse in on themselves sometimes just on the inside.
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Thanks Wolfman for signing on to me. The only problem is that all the lines on the tractor are metal. Now there is one section about 6" on the suction side that does have a hose that's not metal and it looks consistant with factory installed.
I took the fel off so i could get to the pump. Meanwhile i can just push in on the quick connect to see if it's pumping. How do you prime the pump?
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Thanks Wolfman for signing on to me. The only problem is that all the lines on the tractor are metal. Now there is one section about 6" on the suction side that does have a hose that's not metal and it looks consistant with factory installed.
 

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
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113
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Lets get some clarity, post some pictures of your pump setup.
 

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
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Sandpoint, ID
You said it has 2 pumps right?
The pump your showing is the stock pump that is running the 3 point/ which you said works, so most likely not your problem.
Is the loader running off of this pump too?
If it is and the three point is working properly and has good lift power then your problem is in the spool valve of the loader.
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Hey Wolfman, It only has one pump. I spoke to someone today who said the same thing. You said spool valve, now is that the valve that you turn in one direction or the other for the hydraulic to flow to the loader or turn to the back for those hydraulic to work. Yes this is the only hydraulic pump and yes the 3pt will lift up. It is slow but i can't say that exactly because i don't remeber if i had the throttle reved up but it does lift.
 
Last edited:

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
9,106
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Sandpoint, ID
Spool valve is the control valve for up, down, dump, and roll back.
I really need to see the lines and how they are routed to give you any more Ideas on what else might be going on. Just start at the pump and follow the smaller out line everywhere it goes.
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Update. Got home to see if the hydraulic flows. Well after about 5 minutes i turn the spool valve towards front and push in the quick connect to see if guild would shoot out and not it just drips so i pushed lever for 3pt to lift and it did not lift. i turned the spool valve to face the back and tried lifting the 3 pt again and it didn't lift. I did hear the pump for the 3pt making a noise and it stopped when i turned the spool valve forward. I didn't mention this before but i did take the spool valve out before and there isn't much to it. The holes isn't clooged and the o rings looked good. It was clean.
When i get a chance i'm going to take the suction line off off the pump and fill it up with hydraulic fluid then start it up and loosen the return line on the pump to see if it sprays fluid under pressure.
Wolfman, i appreciate you chimming in and giving me your ideas. I have no problem buying a spool valve but i'm not getting how this part could be bad. Theres nothing to it.
I really appreciate your time. Based on other posts i'm surprised others haven't given ides. So you know thanks for your time.
 

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
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Sandpoint, ID
What your turning is NOT the spool valve the spool valve is the valve that controls the loader. What I think your turning is the selector valve.
You shouldn't have to prime the pump! If it's not picking up fluid from the back then something is plugged, have you pulled and cleaned or replaced the screen! Yellow highlight is screen.
8200 screen.JPG

Oh and these are spool valves, just so we are clear:


 
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flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
hi again. I read to check the vent located above the 3pt and at the 3pt pump. I unscrewed it and a lot of air came out. I tried to updoad pic of the pump but it said i exceeded the limit. So i don't know what else to do. I took the loader off so i could work on getting pump off. Even still when i push in on the quick connect that feeds the spool valves that moves the loader it still just weeps out. I tried turning the directional valve forward backward up and down and still have nothing.
 

North Idaho Wolfman

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Staff member
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Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
9,106
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Sandpoint, ID
If you pulled a vent and air came out then you have plugged vents, that's BAD, that alone will cause some crazy hydraulic problems!
Drain the fluid pull the screen clean it, take off any vent caps and clean out the holes in them and make sure they let air flow in and out without restrictions.
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Hey wolf man, cleaned the vent. Tomorrow night i'm taking off the suction line and i'm going to blow air to make sure it's not obstructed. Then i'm taking the returns off and blowing them through. I have had enough piece mealing this and guessing at everything. I'm going to make sure lines are clean. Then i'm pulling that filter and blowing that plus i'm going to hold the filter up to the light and put the fluid back in and starting this bad boy up. Don't you give up on me yet ya hear. Your the only one throwing advice at me. Wish me luck. By the way on that direction valve, what on that can possible go wrong? theres nothing to it but some O rings and they look great, plus was i right by getting suction on the pump and turning the tab by assuming that the pump is ok?. Thanks Man and you and yours have a safe and great Bird Day.
 

bandaidmd

Member

Equipment
B2620 w/LA364 FEL ,BH65, ssqa , 1982 B8200E w/BF300FEL
May 19, 2013
603
0
16
Middle of DELMARVA
Spend some cash on a new filter screen, cleaning mine never worked. I could see light thru it and partswasher fliud also seemed to flow but it still didnt work properly until a new one was installed.

Sent from my SCH-I605 using Tapatalk
 

flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
Today spent 10 hrs. working on tractor.
i removed every section of the hydraulic hoses and blew them out with air.
I replaced any O-rings that looked worn.
I unclogged the only vent there is which looks like a hook.
I purchased and installed new screen filter as you and bandaidmd stated (spent the money.
Drained hydraulic fluid and installed new.
installed new relief valve on hydraulic block.
again i cleaned the directional valve and replaced O-ring even though it's a bolt with a hole in it.
I still would like some one to tell me that since the pump sucked in my thumb when i turned it does this mean the pump is ok.
i will be starting this up tomorrow and let you know if it works.
Can't think of any thing else to do. If this does'n work then i'm going to sell it. Thanks
 

North Idaho Wolfman

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Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
9,106
113
Sandpoint, ID
The combination of the suction line collapsing and "it sucking your thumb"...(Thats just soooooo wrong!:eek:) Your pump does not seam to be the problem.
The only logical choices to your problem are a clogged vent, clogged screen, defective hose, or maybe too heavy of hydraulic fluid.
 
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flh77hd1

New member

Equipment
B8200
Nov 17, 2013
18
0
0
Berkeley Springs, WV USA
ok heres what i got. Somethings working right because now i have power steering and 3 pt. Tried hooking up loader but have to wait until i get an extra set of hands. I know i have some pressure coming through the hoses that connects to the loaders spool controls but since it supposed to be high pressure i can still push in the nipples to the quick connectors but it is a lot better flow then before.
Now i got another problem, theres motor oil blowing out the breather tube. What the hell is that all about?. This is so damn depressing. Any ideas on this oil blowing out the breather tube. It's straight motor oil
 

North Idaho Wolfman

Moderator
Staff member
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Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,888
9,106
113
Sandpoint, ID
It blew the seal out the back of the hydraulic pump, the motor is probably full of hydraulic fluid now.
Good thing it it's very common for that to happen, and it probably didn't do any damage to the engine.
Your going to have to pull the pump again... and replace the seal.