WR Long solenoid question

[jcliburn]

I fixed the problem by tightening the lower screw to about 7,000 ft-lbs. Although the screw was already quite "tight" right out of the box, it didn't make contact with the ground tab underneath it, and I was able to wiggle the tab with my finger. So I tightened and wiggled, tightened and wiggled, and tightened some more until I finally couldn't wiggle the tab. No washers needed. No screws cut.

Both solenoids now work correctly and the grapple is in operation.

 

[kennyd]

Good info JC, thanks for reporting back:thumbsup:

 

[nvlong4n1]

Glad to hear the source of the problem was discovered. I don't remember having that problem before. We sent the screws and terminal block last week.

Nelson

Nelson, I found the problem: The screws that mount the connector block to the valve body are a little too long, and they bottom out before making solid contact with the ground tabs (the square silver pieces under the screw heads in the photo below). I inserted a washer under each screw and everything now works. Unfortunately, the connector block plastic cap won't fit over the washers.

I called and asked Don to send a new connector block, hoping that the screws are shorter or the ground tabs are thicker.

Another option, I suppose, is to cut a couple of millimeters off the screws, but I'm loathe to do that because the threads are so fine.

Thoughts?