rmel wrote: Sun Mar 08, 2026 10:31 am
Typically the front Master and Slave are the first to have engagement/release issues
as it is used the least. If your 4x4 is stuck engaged they probably all need rebuilding.
Disconnect the Hydraulic lines from the Banjo connection. Far easier to reconnect.
Use new crush washers. You should be able to find a Metric copper crush washer
assortment kit with the proper size or UXCELL will have them ala AMZN or McMasters.
SAV does have a Master rebuild kit. I can tell you getting the rear piston seal on is a PITA.
Get yourself some Silicone dielectric oil for re-assembly. You will likely see residual debris
on the cylinder wall from the outermost seal which needs to be removed. Use a kitchen
non-scratch Scotch-Brite pad. The cylinders are Nickle platted and hopefully not pitted.
Getting the cylinders out is fun too. I've used the "Kinetic Energy" approach. Straddle the
Master flange between two blocks of wood and slam down, piston will come out eventually.
If you plan on rebuilding the Slaves (at least do the Front locker slave), there are only seals
available, pistons are no longer available. If the Pistons are pitted on the Hydraulic fluid side
you kind'a SOL. There are replacement Slaves, they are not Banjo connected so there will
be a little manipulating to get the line connected. If the Piston is pitted but only on the
Witches hat side, use a 1200 grit or so Emery to remove any sharp edges, might save that
piston for re-use. I've been lucky so far with my pistons.
I have successful used a Motive Brake Bleeder on the locker reservoir with a Metric adapter
but use a very low pressure <5psi.