What can go wrong in a spool valve?

   / What can go wrong in a spool valve? #11  
Boggen is correct that if you are seeing pressure the spool is shifting. Next step would be to watch the hoses on the lift circuit when you operate the valve. Do they look like they are getting pressurized? I.e. stiffen up? If yes is it one or both hoses. Like Boggen stated quick disconnects can fail and act like a check valve in the circuit. Usually they will allow flow in one direction and not the other but they can also completely fail.

I would say you are getting closer to solving your problem.
 
   / What can go wrong in a spool valve?
  • Thread Starter
#12  
I got it figured out. On the back side of the valve there was a second piece to the check valve. It looks like a plug from the outside, and is keyed to indicate the direction. I did not realize it was directional and did not put it back in the correct direction when I first had the valve apart looking for obstructions. It is now in correctly and the valve is completely functional.
 
   / What can go wrong in a spool valve? #13  
Glad you solved your problem.
 

Tractor & Equipment Auctions

UNUSED CFG Industrial MX15RX Mini Excavator (A47384)
UNUSED CFG...
Lull Highlander 1044C-54 Series II 10,000LB 4x4 Rough Terrain Telehandler (A50322)
Lull Highlander...
2005 CATERPILLAR 12H MOTOR GRADER (A51406)
2005 CATERPILLAR...
New Holland 499 Hydra - Swing Mower Conditioner (A50514)
New Holland 499...
NEW HOLLAND LB75B BACKHOE (A51242)
NEW HOLLAND LB75B...
UNUSED AGT SAWMILL (A51244)
UNUSED AGT SAWMILL...
 
Top