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What do you use to secure O rings before installing

C

corvetttteguy

Member
In many instances I have to install
small O rings underneath a part before installing
it down. (pump manifold, remote hydraulics, ect)

What do you use to keep them in place.
(super glue, non hardening permatex,???)
 
The pump manifold and remote hydraulic oring applications are all a face seal type application. Being a face seal, the orings fit into a counterbore that keeps the oring in place if the correct diameter oring is used. The correct oring will not just loosely fit into the counterbore, you will have to push the oring into the counterbore where will stay put.
 

I'm with the Vaseline crowd! Heat will dissipate Vaseline whereas some of the greases can stay intact and cause problems if they get in the wrong place.
 
Vaseline, use it inside auto transmissions to lube o-rings on rebuild. It's petroleum and melts at a low temp.
 
I took your advise
First I installed the 8 O rings on the bottom of the plate.
I installed dry. Then turned it over and tapped on the
plat to insure no O ring would fall off.
15632.jpg

Then I used the vasalene to coat around the bottom
plate holes. To insure that if the plates miss-register on
bringing them together The O rings would slip on the
bottom and not tear out the O ring from the socket.
I also set up two long bolts to use as guides to hopefully
make good registration.

15633.jpg

Then I put the bolts through the top plate and
turned a few threads. Then lowered the top plate
till it was flat on the bottom.
15634.jpg


I hope all went well.
 
Somehow you missed something in the translation. You smear vaseline around the recess and use it like glue to hold the o-rings in place. Then you can also lube the o-rings themselves so they slide and not grab the mating surface,
 
Yes,
I thought that if the O rings were holding
in the recess I would be OK. I took it
apart and re-did the rings with Vasalene
and then reinstalled the plates. With a
total of 8 O rings both large and small
it is good to use any trick that will
forestall an error.

Next is to install the hydraulic pump to
the motor and manifold. Any tricks to
minimize trapping air in the pump?
 
(quoted from post at 16:44:52 04/29/18) Any tricks to
minimize trapping air in the pump?
Click to expand...

Nope! Just bleed it out once it's all installed. I usually pull the coil wire and crank the engine until oil fills the pump with its bleeder plug removed. Then I replace the plug and coil wire. If this is a diesel, just don't turn the fuel on and crank it with the throttle lever in the shutoff position.
 
(quoted from post at 17:44:52 04/29/18) Any tricks to
minimize trapping air in the pump?
Click to expand...

If all you did was pull the valve on the top cover and clean things up and put it back on, then the pump shouldn't have lost prime, Everything in that area where you were working is past the pump in the hydraulics circuit and any air introduced there should work itself out on its own.
 
(quoted from post at 19:58:08 04/29/18

If all you did was pull the valve on the top cover
Click to expand...

I believe he indicated that's not all he did. Reread all his replies and perhaps you'll see it.
 
No
This is a transplant of the entire hydraulic
system from a donor 641 to my 821 industrial
backhoe tractor.

When I was checking out the 641 engine with
the hydraulics lid removed and pump still
attached, I found that turning the motor over by hand
caused the pump to push fluid out the hydraulics tubes.

However, the pump was removed 1 year ago.
 
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