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Old 04-08-2019   #1
Wideopen38
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Default Hydraulic pressure

I have a l2500 4x4 with a lb400 loader. I just replaced the hydraulic valve. The problem is the loader arms goes up about 8 inches and stops,it will go down fine those 8 inches.The bucket will not roll up or down,all of it was working fine before new valve. Does anyone know what the pressure should be,the valve is set at 2600 psi just starting there.
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Old 04-09-2019   #2
Captain13
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Default Re: Hydraulic pressure

Did you happen to disconnect any quick connect fittings when you replaced the valve. If so, go back, completely disconnect and the ensure a positive connection is made. I've seen that cause similar problems on tractors before.

If that's not the issue, you may have some gunk or trash that has gotten into the valve.
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Old 04-09-2019   #3
buffumjr
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Default Re: Hydraulic pressure

Quote:
Originally Posted by Captain13 View Post
Did you happen to disconnect any quick connect fittings when you replaced the valve. If so, go back, completely disconnect and the ensure a positive connection is made. I've seen that cause similar problems on tractors before.

If that's not the issue, you may have some gunk or trash that has gotten into the valve.
I have been considering building a loader attachment for my L175. That bit of info is vitally important. It's not covered in the instruction sheet.
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Old 04-09-2019   #4
Captain13
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Default Re: Hydraulic pressure

It's not in any troubleshooting charts either. I have seen it on two John Deere tractors where this trick worked on the front loaders.
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Old 04-09-2019   #5
North Idaho Wolfman

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Default Re: Hydraulic pressure

Quote:
Originally Posted by Wideopen38 View Post
I have a l2500 4x4 with a lb400 loader. I just replaced the hydraulic valve. The problem is the loader arms goes up about 8 inches and stops,it will go down fine those 8 inches.The bucket will not roll up or down,all of it was working fine before new valve. Does anyone know what the pressure should be,the valve is set at 2600 psi just starting there.
Sounds like you have lines crossed up.

Or as Captain13 said, you have quick disconnects that have problems.

Did you use Teflon tape on the fittings?
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Old 04-09-2019   #6
lugbolt
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Default Re: Hydraulic pressure

Feedback rod out of adjustment.
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Old 04-11-2019   #7
Wideopen38
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Default Re: Hydraulic pressure

Ok I fixed the bucket problem it was the lines were wrong so thanks for helping with that problem. Now I have another problem the lift in the back will not go up. I have the 4 lines that go to the bucket and three other lines that go to the back one goes all the way to the back behind the seat and two others that goes to a valve with knob in front of the seat. I moved to lines around and the bucket stopped working and the lift worked by putting the lift leveler in lift and moveing the joystick on the hydraulic valve. Can anyone tell me where the hoses should go on the valve.
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Old 04-11-2019   #8
North Idaho Wolfman

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Default Re: Hydraulic pressure

You have the three in and out lines crossed up, the line from the pump is in or pressure line.
If you don't know which one that is crack the 2 lines from the block, hold the stop engine lever and crank it, fluid will come out of the Pump line that goes to IN or Pressure for the valve, The other on the block will be PB (power beyond) and the last line will be tank(return).
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Old 04-14-2019   #9
Wideopen38
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Default Re: Hydraulic pressure

Ok I did everything you said to do but nothing works at all bucket or lifted I looked at it about 10 times I'm lost.
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Old 04-14-2019   #10
Dave_eng
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Default Re: Hydraulic pressure

Quote:
Originally Posted by Wideopen38 View Post
Ok I did everything you said to do but nothing works at all bucket or lifted I looked at it about 10 times I'm lost.
First tell me how many lines are connected to the new valve, 6 or 7?

Can you provide the exact make and model of the new valve and where you bought it.

Do you know how to post photo(s)? If not take a few minutes and try and figure it out as it will save you a lot of typing. The simple way for a novice is to join a free external web hosting service like Imgur.com.

Alternatively, scroll down when you are posting, to the section marked "Additional Options."

Go to Manage Attachments. Here you identify where the photos are on your computer that you wish to post. Once you have done that, select Upload and a thumbnail will appear in your post that others can click on and see the big picture(s).

Did you do the first test Wolfman suggested? With the engine off, open up the line you believe is coming from the pump. Crank the engine but do not start it. Fluid should flow out. Make certain that one line is connected to the valve port marked IN.

Dave

Last edited by Dave_eng; 04-14-2019 at 04:22 PM.
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