Hydraulic Hookups

   / Hydraulic Hookups #1  

BrentD

Silver Member
Joined
Dec 12, 2008
Messages
224
My dad had to replace some hydraulic hoses on the front end loader on our 4340C, and it appears we have something reversed. Our 3-point lift will no longer raise unless we operate the loader at the same time. The loader appears to operate normally, and it doesn't really matter which loader function we use to cause the 3-point hitch to lift. Does anyone have a diagram of the hydraulic hookups for the loader on a 4340C or maybe a good pic of the hookup to the valve body?
 
   / Hydraulic Hookups
  • Thread Starter
#3  
Did you accidentally convert the loader valve to closed Center.

Well, i'm wondering if he could have somehow swapped the feed and the return. I looked at it, but I can't really tell what is what.
 
   / Hydraulic Hookups #4  
Check and make sure the PB and return didn't get switched.
 
   / Hydraulic Hookups
  • Thread Starter
#5  
Could someone with a 4340 or 4940 snap a quick pic? That would be really helpful.
 
   / Hydraulic Hookups #6  
Loader 2.jpg

I've recently gone through the process of sorting this out on my 4340. The picture is the block where the hoses come from going to the valve. The "P" port is pump (out) "R" is return (in), and "T" is low pressure return or tank.

I'd try swapping R & T, and that should solve the problem.
 

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