If you have a "leaky" valve on a stabilizer cyl......is it leaking externally (dripping on floor) or leaking internally (not holding load/bypassing)
If it's leaking externally then go for it, carefully strip it down, clean all parts and inspect for pitting on spools (not good), then reseal using clean #2 grease and reassemble carefully
the problem with trying to "reseal" a valve with wear problems internally is the seals will not cure the bypassing.......the spools are close fitting to the housing bores and are not fixable with just a reseal........best to replace that section of control valve
Best to mark all hoses and cap them, and remove the valve to do any repairs, don't try it on the machine.....it just makes more work
And, oh yea, a good pressure wash before you remove it will be a godsend......:thumbsup: