jaap
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Re: How To: Reduction Gear Oil Change

Tue Oct 12, 2021 2:00 pm

Nubo wrote:
Tue Oct 12, 2021 1:25 pm
Was the car level when you refilled the gearbox?
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voltamps
Posts: 166
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Re: How To: Reduction Gear Oil Change

Tue Oct 12, 2021 5:41 pm

jaap wrote:
Tue Oct 12, 2021 5:34 am
I filled it until it came out again from the filler hole. That was approx. 1.4 liters.

Where is this breather tube connected? It's hard to see in this exploded view (and also in the engine compartment without taking the engine out).
It's the black tube in the picture below, connecting to the gearbox to vent air pressure in & out. It connects slightly above the oil level. (Note the position of the fill plug relative to the connection point.)

Not sure how fluid can escape in any significant amount thru the breather unless fluid was drawn in to the breather connection consistently. Doesn't seem likely.

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nlspace
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Re: How To: Reduction Gear Oil Change

Tue Oct 12, 2021 7:44 pm

If you follow the bottom of the tube in the diagram, it is supposed to attach to a nipple on the brush ring cover; the top end runs up to connect to the breather element up high on the inverter, held by clip FN9 in the diagram. The tube is connected at both ends, there is no open end of the tube.

knightmb
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Re: How To: Reduction Gear Oil Change

Tue Oct 12, 2021 8:27 pm

jaap wrote:
Tue Oct 12, 2021 2:00 pm
Nubo wrote:
Tue Oct 12, 2021 1:25 pm
Was the car level when you refilled the gearbox?
Image
Seems to be tilted about 1 degree forward, all is lost! :mrgreen:
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jaap
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Joined: Wed Dec 02, 2020 7:14 am
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Leaf Number: 123456

Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 12:33 am

nlspace wrote:
Tue Oct 12, 2021 7:44 pm
If you follow the bottom of the tube in the diagram, it is supposed to attach to a nipple on the brush ring cover; the top end runs up to connect to the breather element up high on the inverter, held by clip FN9 in the diagram. The tube is connected at both ends, there is no open end of the tube.
In my car it's loose on one side. It seems the breather and a piece of tube is missing?

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voltamps
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Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 2:43 am

jaap wrote:
Tue Oct 12, 2021 2:51 am
..... the oil seems to be inside the little tube too. I'm sure it's not the plugs, they are dry and the oil is on the right side of the gearbox, not on the left side where the plugs are.
Sounds like the breather tube is not leaking at the attachment point to the gearbox, which is the same side the plugs are on. The right side (non-plug-side) is where the tube goes to, so it's traveling up the tube. Some fluid escape is normal, usually just fumes. Big leakage is strange.
2020 Leaf SV - sold - I'll get another EV later...Reserved the irresistible Maverick Hybrid, here in a few months
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nlspace
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Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 7:41 am

The breather tube is mounted nearly vertical such that liquid that condenses out from the vapors will drip back down into the gearbox; with the top open and folded down over the other side of the gearbox, the liquid has a path to run down the right side. If it were slightly overfilled then it might be more prone to pumping in the tube.

Somebody must have removed the breather or the tube broke.

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Stanton
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Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 8:23 am

So we've morphed from Gen1 to Gen2 Leafs? Not sure how much of a difference it is where the gear box is concerned, but still a bit of a curve ball. I am getting ready to do this on my Gen1 Leaf (with Valvoline ULV).
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voltamps
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Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 2:16 pm

nlspace wrote:
Wed Oct 13, 2021 7:41 am
Somebody must have removed the breather or the tube broke.
I see you're prob right. Also note how jaap's last picture above showed oil spots all over the orange parts.
The breather "cap" on the end looks like it is super important to have in place, only allowing small openings up there, not a big open tube to burp fluid out.

Maybe a mechanic was in there very early in the life of this vehicle, damaging it, before jaap bought it, or some num-nut at the factory installed only part of the tube (minus breather). Or, it could have fallen off. All seem like they would be rare. ???

Hoping no funny noises start coming from the gearbox from low fluid for a bunch of miles! Should be easy to replace the breather tube assembly or at least the cap part. Just weird this happened at all.

An aside: Don't jaap's front ramps look flimsy? Needs X shaped bracing on the sides. Maybe I'm paranoid.
2020 Leaf SV - sold - I'll get another EV later...Reserved the irresistible Maverick Hybrid, here in a few months
2016 Ford Focus Electric (traded in at 34k miles, 5 years)

nlspace
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Re: How To: Reduction Gear Oil Change

Wed Oct 13, 2021 4:46 pm

jaap wrote:
Wed Sep 22, 2021 1:58 am
...when I opened the drain plug, nothing happened. After a while a tiny stream of pitch black oil came out. What came out was less then 0,10 liter!
Oh yeah now we know how and why it was so extremely low on oil--it all puked out the tube with the missing breather valve.

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