John Deere 455 Steering Valve Reassembly Question

[KablooeyLouie]

Hello all. I've been lurking for some time and am just completing a rebuild of the steering valve for my 455. I'm left looking at the seven bolts that close the unit up, wondering if there shouldn't be something used to seal them. Their bores are inside of the unit's O-rings, which means they exist within the pressurized side of things... is torque enough to keep them from weeping fluid? I reeeally don't ever want to have to touch this thing again.

Ever.

Thanks in advance!
Lou

 

[beenthere]

Welcome to TBN

Post up a pic or two of what you are working with.

 

[KablooeyLouie]

Not my picture, but should give you the idea... The bolts on the end all exist within the large O-rings used at the joints in blue. That tells me they're inside the pressure zone, and theoretically capable of leaking at the bolt head. Of course, John Deere and their platinum-priced hardware may have some kind of wonderful magic happening, but just thought I'd solicit the giant throbbing brain here to see what people's experiences were.

 

[oldnslo]

Lou,
Looked at the TM1517 service manual and I could find nothing stating that any sealant needed to be applied to those bolts. Just states install cap screws and tighten to 150 in-lbs using criss cross pattern.