JD 535 Baler

Ran baler this weekend, had problems with tension-er system on baler and door latch.
When starting a bale have to keep bumping the controls to keep gate closed, once I see pressure start to build on the gauge indicator on baler i can quit bumping controls.
The baler tension or what ever you call how tight to wrap a bale, the pressure does not stay, if I do not bump controller pressure goes to zero, baler will fill up real quick because there is no pressure on the tension-er system.
There seems like there is pressure bleeding through the block on the frame that controls the tension cylinders.
Any ideas where to look first.
One other thing, every time I close the gate pressure will not stay on baler system, it bleeds off.
 

Close tailgate then disconnect hoses from tractor. If male tips don't leak now bale a bale to see if pressure on baler gauge will rise as bale is formed. If pressure doesn't rise it's possible that tension valve,tension cylinders &/or gate cylinders are at fault. Tension cylinders can be checked for internal leakage by removing lower(butt) end hose then move scv lever direction to close gate & only a very few drops of oil should exit open orifice on cylinder.
 
I will bet that the trouble is in the tractor SCV not the baler. 80% of the time when a JD baler will not hold pressure it is the tractor SCV not the baler. The only reason it stays latched when you baling is the hay is creating more pressure than the SCV is leaking off.

If the tractor has another SCV try the baler in that one. IF not switch the hoses around. This moves the baler circuit on to a different internal valve in the SCV. Yes the lever will be backwards but it MIGHT hold pressure then.

A gate cylinder leaking internally can cause a leak off in pressure but that usually will not leak slow enough to bale with.
 
I believe your tension cylinder is leaking oil past seals inside easy way to find out is remove the bottom line on the cylinder work hydraulic lever on tractor 22 drops of oil per minute is spec mine poured oil had cylinder rebuilt
 

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