70 series hub help

Submitted: Sunday, Mar 08, 2020 at 09:20
ThreadID: 139769 Views:11065 Replies:9 FollowUps:8
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Hi Folks

Well I fear I have had an old timers moment. In my haste to head away on a trip last year I think I have stuffed up the way I re built my hubs. Quite ridiculous considering how long I have been doing this for.
Can't get any specific pictures from the manual or the net so thought I'd post here.



Looking at the Hub Seal photos. This would be the incorrect way to install, yes?

Now the oil seal, that obviously only goes one way. But does it sit flush with the end of the axle or it it pushed in around one inch?

Thanks for your help.

Regards

Lyndon
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Reply By: Member - nickb "boab" - Sunday, Mar 08, 2020 at 10:27

Sunday, Mar 08, 2020 at 10:27
Haha yes incorrect... that would be a Stroke of Genius how did you manage to get it in... lol
If I understand your question correctly flash would be my opinion but it's been a while since I missed with these too .
I'm sure your are going to get a lot more scientific replies good luck
Cheers Nick b

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Follow Up By: Member - lyndon NT - Sunday, Mar 08, 2020 at 11:45

Sunday, Mar 08, 2020 at 11:45
Beer may have helped :-)
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Reply By: noggins - Sunday, Mar 08, 2020 at 10:47

Sunday, Mar 08, 2020 at 10:47
Isn't a seal meant to stop rubbish etc getting in
Not the lubricant getting out ?





R
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Reply By: Bob Y. - Qld - Sunday, Mar 08, 2020 at 12:13

Sunday, Mar 08, 2020 at 12:13
Seal is 3rd photo is in the correct way, Lyndon. Just need to press it a bit further until the steel part is flush with edge of the hub. That extra bit sticking out the top is for reducing dust/mud getting to the outer seal surface, I believe.

The small oil seal that goes into the axle housing should be flush with the end of the threaded axle bit.

Bob

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Can't remember most of it.

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Follow Up By: Member - lyndon NT - Sunday, Mar 08, 2020 at 13:43

Sunday, Mar 08, 2020 at 13:43
Hi Bob

The seal in the second and 3rd photo's are the same. The new one just isn't driven in yet, but facing the same way.
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Follow Up By: Bob Y. - Qld - Sunday, Mar 08, 2020 at 20:06

Sunday, Mar 08, 2020 at 20:06
You’re right, Lyndon. Long time since I had 20/20 vision!

Thanks,
Bob

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Reply By: Ron N - Sunday, Mar 08, 2020 at 12:23

Sunday, Mar 08, 2020 at 12:23
Lyndon, the shoulder of the seal is normally fitted flush with the inside end of the hub.

But it pays to do a test fit with grease on the lip, to ensure the seal lips are running closely to the original spot they were running on, prior to disassembly.

Also, check the area the lips are running on to ensure that there's no grooves worn in the lip-running area, which will prevent proper seal operation.

If there are grooves where the seal lips ran previously, you may require the installation of a Speedi-Sleeve to provide a satisfactory running surface for the seal lips.

Cheers, Ron.
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Reply By: Member - lyndon NT - Sunday, Mar 08, 2020 at 13:49

Sunday, Mar 08, 2020 at 13:49
https://www.youtube.com/watch?v=5lmQE3_oiNQ

at the 5 minute mark shows seal being put in the other way, though unsure if it is exactly the same seal
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Reply By: tonysmc - Sunday, Mar 08, 2020 at 14:54

Sunday, Mar 08, 2020 at 14:54
I think you have it the right way as all the seals I have ever done have that flat edge of the seal on the outside as is shown in the pictures. As you have stated it just needs to be tapped in until that brass bit is flush. In the video below you can see the same seal and facing the same way as you have it at the 9:45 mark.
https://www.youtube.com/watch?v=l4R6T39u9TY
AnswerID: 630387

Reply By: Allan B (Sunshine Coast) - Sunday, Mar 08, 2020 at 14:59

Sunday, Mar 08, 2020 at 14:59
.
Well at least Lyndon, they are damned good photos. lol
Cheers
Allan

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Follow Up By: Member - lyndon NT - Saturday, Mar 14, 2020 at 08:54

Saturday, Mar 14, 2020 at 08:54
Thanks Allan

Yes, the S10 takes a good photo :-)

Still yet to work put what the issue is though. See below,

Cheers

Lyndon
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Follow Up By: Allan B (Sunshine Coast) - Saturday, Mar 14, 2020 at 09:06

Saturday, Mar 14, 2020 at 09:06
.
Hi Lyndon,

I drive a 2002 Troopy and carry spare wheel bearings and seals.
My mechanic has shown me how to change them but it was some time ago and I hope I never need to on the track. If needed, I will observe carefully and take photos as I dismantle as I sometimes do with electronic items. However, I am no help to you here.
Cheers
Allan

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Reply By: Member - Serendipity(WA) - Thursday, Mar 12, 2020 at 20:47

Thursday, Mar 12, 2020 at 20:47
Your seal is positioned correctly.

From my memory there are two types of seals for the rear hubs on a landcruiser. One which is flat and one with extended outwards extra rubber. The flat one is still current but more associated with older cruisers.

I believe the one with rubber extended outwards like you have is supposed to be more water and dust proof.

I have used both.

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Reply By: Member - lyndon NT - Saturday, Mar 14, 2020 at 09:39

Saturday, Mar 14, 2020 at 09:39
Hi Folks

Well the mystery is still yet to be solved.

The oil and grease issue is happening both sides. This took less than 5 thousand from last rebuild to occur.

The way I have the seals installed is correct.

I have an in-law that is service manager at one of the Toyota branches.

He suggested a blocked breather, yes, YES, I thought. It all makes sense now.
Nope, breather clear :-(

"Maybe it was the type of grease?" In his workshop they use CALTEX DELO GREASE EP 2

I thought that perhaps the grease I was using wasn't up the the exposed temperatures.
Caltex HTB 2. 200c rating. Mmmmm, well this has a higher rating than the grease Toyota are using in their workshop. Mmmmm

I see the one Toyota are using is Lithium based. Mine is not. Maybe it is mixing with the Grease during water crossings and creating the issues. Can't say I do a lot of water crossing though.....
Tried mixing a bit of the HT grease with boiling water, as I expected, didn't tell me much. can't really simulate pressure and temperature.

The rear of the axle where the hub seal runs looks ok.

Just maybe, i was sold the wrong oil seals, the 75 runs a 35 mm axle, the 78 series 36mm. Mmmm...

One thing I do know, I'm really not interested in replacing the Hand brake shoes every year, not to mention repacking the bearings etc etc. I'm quite capable of doing these things but don't have a set up workshop with a hoist, so it takes a WHOLE WEEKEND!

Regards
Lyndon
Now is the only time you own
Decide now what you will,
Place faith not in tomorrow
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Follow Up By: axle - Saturday, Mar 14, 2020 at 14:34

Saturday, Mar 14, 2020 at 14:34
Hi Lyndon,
Are you sure your getting the bearing pre load right?, and there not loosening up after a while.

That can upset seals no end,



Cheers Axle.
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Follow Up By: Member - lyndon NT - Saturday, Mar 14, 2020 at 14:45

Saturday, Mar 14, 2020 at 14:45
Hi Axle

Toyota manual says 60 Nm. They what I set them to. There is no knock in the wheels (side to side when jacked up). Thanks for the thought though.
Now is the only time you own
Decide now what you will,
Place faith not in tomorrow
For the clock may then be still

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Follow Up By: 9900Eagle - Saturday, Mar 14, 2020 at 18:40

Saturday, Mar 14, 2020 at 18:40
Lyndon, reading through this thread the only other thing that could cause your problem is a bent diff housing.

Anyway all the best in finding it.

Cheers from the retired Eagle.
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