WM LT40 hydraulic question

[Idiocrates]

My LT40 has developed a hydraulic leak somewhere on or around the side support hydraulic cylinder.  I can't really tell if the fluid is dripping from the threaded connections on the cylinder or if its coming from one or more of the fittings associated with the two sequencer valves on the side of the cylinder.  My hydraulic knowledge is pretty limited so I basically have two questions:
1.  Are the sequencer valves subject to leaking failures.....and can they be repaired or must they be replaced?
2.  I couldn't see any "unions" in the hydraulic plumbing around the side support cylinder.  Are the hose fittings connecting the sequencer valves the swivel type or is there some specific sequence required to take off and replace hoses and fitting?

If anyone has had experience with these fittings or this situation I'd sure appreciate any advice you have to offer.  Thanks.
 

[donbj]

Not sure if sequencing valves are rebuildable but give the the area a good wiping dry and then work the hydraulics out in both directions and you should see where it's(leak) coming from. It'll give a better idea where to start

[JustinW_NZ]

as above, clean and check but a wee safety reminder...
never stick your hands/fingers around the supected leaking area (high pressue oil can cut) and dont look close without safety glasses - as before...

Usually after a clean and run the leak shows up tho...

Cheers
Justin

[terrifictimbersllc]

Agree, wipe it all clean, have someone operate the control briefly up & down, glasses & cover yourself up, look carefully to see where its coming from. 

[Chuck White]

What year is your mill?

Mine is a 1995, and I ordered and received the rebuild kit which includes 2 springs and 2 ball bearings for each of the sequence valves.  I just haven't done the rebuild yet!

The valves on my mill are flat and rectangular shaped, WM does have and upgrade model and they are shaped differently!

[Hackeldam Wood Products]

If you can't find it you can dye the oil and look at it with a blacklight. It leaves a fluorescent trail.

[MartyParsons]

Hello, 
   I have seen these sequence valves crack. I would assume from over tightening. You could clean with brake clean and then use baby powder on the area you may be able to see the leak a little better with the white powder. 
M

[Idiocrates]

My mill was purchased new in June of 2015.  The sequencers on this mill look like long nuts (approx 6" long) with a notch cut around one end.  They have 3/8" NPTM to 1/4" NPTF reducers screwed into each end with 1/4" NPTM 90 degree elbows screwed into three ends and a 1/4" NPTM "T" fitting screwed into the fourth.  The area is definitely infested with a bunch of hydraulic fittings.  The leak occurs only when the hydraulic system to the log turner/side supports is active although I haven't been able to determine if it starts before the log turned starts to lift or after.
Thanks everyone for the advice....I'll keep looking.

[Nomad]

     I second what Marty says.  It's definitely possible for a sequencing valve to crack.  Lay a clean rag under the area and look for a drip.  That will give you an area to start looking.

[barbender]

Yeah, never try to find a hydraulic leak with your hand! The pictures of hydraulic injections into people's arms are one of the things that always stick with me from our annual logging safety/cpr classes!