That is the return line. Goes to a Tee in the return line of the FEL.
This is the layout I have.
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I just followed this procedure and installed the same third function kit on an L35 and ran into the exact same issue. I used the diagrams from this thread and quickly realized at the end that his pressure and return ports are incorrectly labeled on OP's diagram. I suspect that at the very end of things that he switched the hoses to fix the issue, but if someone were to follow the diagrams he used it wouldn't be correct.
Here's the actual layout of the loader valve so nobody makes the same mistake:
![]()
LT1Pat,I just followed this procedure and installed the same third function kit on an L35 and ran into the exact same issue. I used the diagrams from this thread and quickly realized at the end that his pressure and return ports are incorrectly labeled on OP's diagram. I suspect that at the very end of things that he switched the hoses to fix the issue, but if someone were to follow the diagrams he used it wouldn't be correct.
Here's the actual layout of the loader valve so nobody makes the same mistake:
![]()