Hydraulic filter gasket or O ring.

[sfedeli3]

Hi Art, I used the one from Parker and later the one from Cat (part #119-7844)
when I re-serviced the system. The o-ring fits into a small groove on the top of
the filter canister. I lubed it with a bit of 10W30 motor oil (same as what is
in the large filter tank) and then hand tightened the canister onto the filter
head. Since the canister had fine, machine threads, it was really challenging to
get the threads lined up with the canister full of oil. You also had to be
careful not to knock the filter element off the nipple where it hangs from the
filter head. The second time that I did it, I installed the filter element on
the head, filled the canister only about 1/2 full of oil and that really kept me
from making a mess. If you don't insert the filter onto the head first, it will
usually not line up with the nipple when it's in the canister. It's an awkward
place to work and hard to apply much force up on the canister while laying on
your back. Once it is hand-tight, you can only turn it about 1/2 a rotation
before it is fully seated. The canister is made of aluminum, so be very careful
not to cross-thread it.

Shane Fedeli
85PT40
Hershey, PA

--- In WanderlodgeForum@yahoogroups.com, "artw" wrote:
>
>
>
> --- In WanderlodgeForum@yahoogroups.com, "sfedeli3" <sfedeli3@> wrote:
> Shane,
>
> Which of those seals did you use. Also, the canister takes a 1 1/8 socket to
> tighten it. I would assume that means very tight. I did tighten it about one
more turn while at Monterey. That slowed the leaking down
> from two Qts. every 100 miles to one Qt. It took almost an hour to get the
rear of the coach clean. Shoud the seal be lubricated with something
> before installing? I don't remember doing that when I changed that filter.
>
> Art Weatherly
> Riverside Ca
> '85 PT36
> >
>