TC45DA curl/dump/regen issue

/ TC45DA curl/dump/regen issue #1  

junkyardjoe

New member
Joined
Oct 11, 2015
Messages
1
Location
Wisconsin
Tractor
TC45DA
Good morning all,

First wanted to say thanks to all those who provide such good content here, I have been lurking on this site for some time now and have sofar always been able to diagnose my issues or learn what I was seeking out based on content here. I am assuming that either jinman or J_J or one the many others here can help me in this situation.

My tractor is a TC45DA with approx 1200hrs. I have the 17LA loader with two rear remotes.

So first the situation that lead to the issue. . I was forward leveling a small pile of dirt with the bucket at full dump at approx 90 to the ground (yes I can hear you cringing now, in my defense it was just a loose 8" pile or so I thought, looks like there was a large rock imbeded in the ground that I hit). Anyway I was moving forward and blew a curl hose on the left cyl. I replaced the hose, cycled the system alot and still am having the following issues:

Issue #1: There is no power in power dumping. I can not back drag, nor lift the front end off the ground (unless the bucket is in full dump, 90deg to ground).

Issue #2: Regen dump is now a curl function.

The valve now functions as follows:

LEFT: curl
CENTER: centered
INITIAL RIGHT: dumps, but only due to gravity
FULL RIGHT: curl

I have not checked the precise pressure on each circuit, but believe that the symptoms both point to a considerably reduced pressure on the dump circuit. Since curl works well, I think an internal leak in the cylinder can be eliminated. Also since I have not changed anything on the dump circuit hoses I think I can assume the issue is with the mid mount valve.

If this is true, is this valve serviceable or do I search out a new valve?
Will knowing if the pressure on the power dump valve position is zero or 500 give an indication to what the root cause/solution(ie is it valuable to measure pressure here as I dont have this set up yet?)
Thoughts on where to go from here?

Thanks much in advance,
 
Last edited:
/ TC45DA curl/dump/regen issue #2  
If you have a regen spool, you also have parts outside the valve under the caps on the bottom of the valve.

Remove the can covers and inspect the parts for broken or misaligned parts.

You might need a valve breakdown for this, or a hyd shop can do the job for you.

You should have fast dump in the first part of lever travel to the right and power dump to the far right.
 

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