"I'm trying to replace the
"I'm trying to replace the o-ring in my trim piston, as the Seloc manual states, but I can not unscrew the top portion. I have used vinegar to remove the corrosion and soaked it in penetrating oil but it doesn't budge. I am hesitant to use heat due to the rubber seals.
Is there any type of tool that will fit in the four holes? I am currently using a punch and whacking it with a hammer.
Thanks!
piston
"I'm trying to replace the o-ring in my trim piston, as the Seloc manual states, but I can not unscrew the top portion. I have used vinegar to remove the corrosion and soaked it in penetrating oil but it doesn't budge. I am hesitant to use heat due to the rubber seals.
Is there any type of tool that will fit in the four holes? I am currently using a punch and whacking it with a hammer.
Thanks!

