loctite and hydraulic fittings.

glennster · Apr 20, 2015

one of the lift cylinders on my skidder has been leaking hydraulic fluid. looked at the fitting closely and appears some time in the past a heli-coil was installed into the cylinder itself so the line fitting could be installed. getting fluid leakage around the heli coil insert. was thinking about trying to seal it with loctite. have 242 medium strength, 271 hi strength and 290 wick n lock. any thought on which would work the best?

NCWayne · Apr 20, 2015

If it's leaking around the thread repair, then I'd try the 290 as you'll want something that will wick it's way into the area behind the threads and seal it there, as well as between the inside threads of the repair piece and the fitting.

Steve@Advance · Apr 20, 2015

Is this a taper pipe, flare fitting, or straight pipe with oring?

If it's taper, loctite might hold. Won't hurt to try, just put some heat on it to get it apart.

If it's a flare, chances are there is a crack in the line where it's flared, the seat is damaged, or the repair insert was installed crooked. If the seat is damaged or the insert is crooked, loctite might hold.

If it's an oring seal, look at the sealing surface, see if it's damaged, maybe some JB weld and dress it flat for the oring to better seal.

Fawteen · Apr 20, 2015

Get some Loctite 545. Specially formulated for hydraulics. Amazing stuff, we used it at the fish cannery.

Take a deep breath before they tell you the price tho...

big a · Apr 20, 2015

(quoted from post at 17:22:26 04/20/15) Get some Loctite 545. Specially formulated for hydraulics. Amazing stuff, we used it at the fish cannery.

Take a deep breath before they tell you the price tho...

This is good stuff.

bison · Apr 21, 2015

I would pull the helicoil out and drill and tap for the next size pipe fitting.
If you locktite it in you won't be able to remove the fitting in case it gets damaged later on.

my 2c

glennster · Apr 21, 2015

steve, i havent pulled the fitting out, but i suspect it is a tapered pipe, probably 3/8 ths inch. the fitting 90's out from the cylinder and then goes to a line fitting which looks to be flare. i am going to try the wick n lock as wayne suggested, i have it already. if it holds i can get thru the summer with it, and if need be, pull the cylinder apart in the fall and have it machined.

loctite and hydraulic fittings.

glennster

Well-known Member

NCWayne

Well-known Member

Steve@Advance

Well-known Member

Fawteen

Well-known Member

big a

Member

bison

Well-known Member

glennster

Well-known Member

Similar threads