that is rather odd, i still believe that 3373 code was actually an hour meter reading.
as far as the scr2? i find it odd it didnt throw up any codes like 44,45,47,49 or 50 as all those codes are related to the 2rec.
and of course if it was hydraulic related it would be the same codes but in 3 digit such as 144,145,147 etc.

But in all actuality all these codes are basically general codes related to some type of failure in that circuit and there can be other reasons these codes could be triggered that are not even related exactly to how the manual describes the symptom and related components. They are just guides to help find the actual problem.

All in all it is good that you found the issue and got it repaired
good job!
Lets just hope you didnt repair a ghost problem and it doesnt return at some later time, its been my experience to go ahead and check all the other scr's while in there because sometimes this can come back and bite you ;o)