Compression Struts Metal Spar

[JLCUB]

While cleaning and prepping my compression struts for epoxy primer I noticed some dried up grease in the end cavity where the threaded inserts are. I came across this statement by Richard (reileyr) in another thread and have a couple of questions:

What is "pink/red"? If it is a lubricant does someone have a part number or source?

Is there a torque value for these bolts? If not is snug good enough since the drag strut bolts have a plate lock on them?

If this is a metal spar wing, each end of compression strut has a threaded aluminum end piece that the bolt screws into. Piper lubricated (pink/red) these bolts prior to installation to prevent galling the aluminium threads. Common for these bolts to be reinstalled without lubrication, stripping the threads. Try slightly tightening the bolt, but if it turns without tightening the drag strut, you can conclude the end fitting is stripped. There are plenty of Cubs flying with stripped compression strut end fittings. Easiest to repair when wing is uncovered. I don't remember if wood spar wings had a similar set-up. Richard

Jack

 

[bob turner]