John Deere 390 plow blade

sleepynightowl · Feb 20, 2009

Hi i built a quick attach for my 870 Jd to fit the 390 Jd blade on the loader it worked out great used a cushion vlv also to protect the hose and rams .The blade was new that i had purchased it at a auction . i found it had a bad plow cylinder and replaced it with a new one from Jd 390.00 does any one know of a ram to replace the JD one. it is the quick switch ram. thanks sleepy.

kennyd · Feb 20, 2009

What was "bad" with the cylinder? You can purchase new seal kits for about $20 or so (I just rebuilt mine a few months ago)

sleepynightowl · Feb 21, 2009

Hi hyd oil was spraying out the vent hole when activated to extend does that have a ball check where the vent is? any info would be great thanks Sleepy.

kennyd · Feb 21, 2009

sleepynightowl said:
Hi hyd oil was spraying out the vent hole when activated to extend does that have a ball check where the vent is? any info would be great thanks Sleepy.

NO! There is no check valve, you just need to seals. The only reason to replace a cylinder would be having a bent or excessively scored/pitted piston or bore.

Look at the picture I attached.