Over filled portal gearcase
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Over filled portal gearcase
I was checking the fluid level in my portal cases and one in back is very over filled. Can oil get from the differential into the portal cases?
Jim Chance
710M
All my post fully incorporate the Dunning-Kruger effect
710M
All my post fully incorporate the Dunning-Kruger effect
Re: Over filled portal gearcase
You would have to have a lot of very broken things to even
get a drop of oil from the Diff to the portal. It's damn near
impossible.
Did you pull the plug when the Portal was warm? If so you
should expect to see some oil leak out due to expansion.
The second possibility was that your wheel drives where
"spin filled". I was taught this trick by a Pinz mechanic in the
Bay Area. While you are filling the wheel drive, have someone
spin the Tire or Drum, this will cause the gears to "pump" up
the fluid so then you can squeeze in a few more CC's into that
puny chamber -- under this scenario you would be a tad
overfilled.
get a drop of oil from the Diff to the portal. It's damn near
impossible.
Did you pull the plug when the Portal was warm? If so you
should expect to see some oil leak out due to expansion.
The second possibility was that your wheel drives where
"spin filled". I was taught this trick by a Pinz mechanic in the
Bay Area. While you are filling the wheel drive, have someone
spin the Tire or Drum, this will cause the gears to "pump" up
the fluid so then you can squeeze in a few more CC's into that
puny chamber -- under this scenario you would be a tad
overfilled.
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712MK
Driver: Ron // KO0Q
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712MK
Driver: Ron // KO0Q
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- Posts: 1776
- Joined: Fri Apr 16, 2004 8:08 am
- Location: Blue Mounds, WI
Re: Over filled portal gearcase
Lube can get from the diff to the wheel drives. IIRC, there are a couple o-rings and/or seals in the diff that keep the fluids in their proper boxes. It's been years since I did the repair, but I seem to recall a seal that had a critical placement when reassembling things.
Check your diff level to see if it's low.
Check your diff level to see if it's low.
It is better to go skiing and think of God, than go to church and think of sport. Fridjof Nansen
I hope to die in my ski boots... ...just not today. Me
I hope to die in my ski boots... ...just not today. Me
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- Posts: 240
- Joined: Tue Feb 18, 2014 4:59 pm
- Location: Lafayette, LA and Highlands, NC
- Contact:
Re: Over filled portal gearcase
I found some old threads on here and it looks like it does happen. In one thread Jim L indicated it was something that the repair could be put off for a bit as long as oil was not getting on the ground. Sounds like the diff needs to come out but not completely apart. The parts look cheap, but it looks like a lot of work.
Jim Chance
710M
All my post fully incorporate the Dunning-Kruger effect
710M
All my post fully incorporate the Dunning-Kruger effect
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- Posts: 1776
- Joined: Fri Apr 16, 2004 8:08 am
- Location: Blue Mounds, WI
Re: Over filled portal gearcase
For sure, it's a bit of work to pull a diff, but far from impossible. Front is worse than a rear, I believe.
So long as you keep lube in the gearboxes, you can indeed live with the leak/s.
If the seal/s in the wheel drive fail, the wheel drive lube can leak into the brake assembly area. There's a weep hole there which theoretically drains any leaked lube out the back of the backing plate (towards center of vehicle), as long as the weep hole is clean. This is to prevent the lube from contaminating the shoes.
So long as you keep lube in the gearboxes, you can indeed live with the leak/s.
If the seal/s in the wheel drive fail, the wheel drive lube can leak into the brake assembly area. There's a weep hole there which theoretically drains any leaked lube out the back of the backing plate (towards center of vehicle), as long as the weep hole is clean. This is to prevent the lube from contaminating the shoes.
It is better to go skiing and think of God, than go to church and think of sport. Fridjof Nansen
I hope to die in my ski boots... ...just not today. Me
I hope to die in my ski boots... ...just not today. Me
Re: Over filled portal gearcase
I have found the same situation on the left side R.A. when I bought my Pinz in 2016, and only half a quart of gear oil left in my rear diff. I am still driving like that, checking oil levels and correcting them if necessary, watching how fast the oil leaks. It seems to be very slow, so I´m not taking action yet.