Hydraulic cylinder gland nut leaking after rebuilding

[cjmc]

Hi all
I recently put new seals in the dipper arm cylinder of my excavator.
Today was the first day I ran it properly since resealing.
There is a small weap of oil coming from between the gland nut and cylinder barrel.
I guess the oil is bypassing the o ring seal on the gland nut.
I used a genuine seal kit and made sure to use plenty of lube when reassembling the cylinder and also followed the workshop manual.
It is a threaded gland nut that is on the cylinder, not a cap with a ring of bolts.
If I was to unscrew the nut halfway, and apply thread tape or compound, and tighten the nut again, would you think it would seal it up?
Thanks

 

[Vetech63]

Some cylinder glands used a o-ring just under the gland lip as a dirt protector. Not sure if yours was designed that way but your idea should work as long as the perimeter o-ring wasn't damaged when you installed the gland back into the barrel.

 

[cjmc]

Some cylinder glands used a o-ring just under the gland lip as a dirt protector. Not sure if yours was designed that way but your idea should work as long as the perimeter o-ring wasn't damaged when you installed the gland back into the barrel.

Thanks for the reply.
Ya I suppose I wont know if its damaged or not until I unscrew the gland a bit. I was very careful to keep everything straight and used plenty of lube to prevent the o rings getting damaged, so hopefully it's ok.

 

[56wrench]

any sharp edges inside the barrel can nick an o-ring. they need to be smoothed before installation of the gland in the barrel