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V8-250 saloon: BW35 - Manual Shaft Oil Seal

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classiclife
Posts: 273
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
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V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife » Sat Feb 23, 2019 1:19 pm

Hello,

I'm looking for some advice on the following issue, please.

ATF leaks very slowly from the manual shaft oil seal (part number 9769) item 3 on the attached diagram of the BW Type35 Autobox assembly.

Looking at the position of the manual shaft and the lever assembly, in conjunction with the space available with the Autobox remaining in situ, is it possible to remove that oil seal without removing the gearbox ?? The area is restricted with the exhaust heat deflector which will require removing, but in general the area is tight.

Logic says no, but logic does not always give the correct answer !!

The leak is not dreadful, but it is there and ideally I'd like to eradicate it.

If it is a g/box out job - then a drip tray will save the day !!

Any help on the above will be gratefully appreciated.

Thank you in advance.

Regards.

Richard.
Attachments
V8-250 saloon BW T35 Auto Box - Item 3 Enhanced.jpg
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

Clive
Posts: 15
Joined: Sat May 12, 2018 2:09 am
Location: Phoenix, USA

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by Clive » Thu Feb 28, 2019 6:14 am

Hi Richard,

I too have wondered. The service manual instructions for removing the box with the engine in place tells you to remove the engine stabiliser allowing the box to tilt down. See Fig 31 in manual. This may give you access to the seals, but it seems a comprehensive job with no guarantee.

Someone on the old forum used rubber washers crushed under locknuts to try to create a seal outside of the leaking seals.

Clive.

johnwager
Posts: 46
Joined: Thu Feb 11, 2016 3:26 pm
Location: Thundersley, Essex

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by johnwager » Thu Feb 28, 2019 11:09 am

Richard
I have changed this seal on my car,with the gearbox in situ fairly easily.
Disconnect the selector cable then undo the retaining nut and remove the selector lever, dig out the old seal with a small screwdriver, taking care not to damage the shaft or housing. Once you have cleaned the area, smear a little grease on the lip of the seal then slide it over the shaft. It can then be pushed into the housing using the nut of the shaft over a small socket or similar (can't remember what I used)
I did this laying on my back under the car.
Hope this helps
John

classiclife
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Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
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Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife » Thu Feb 28, 2019 9:41 pm

Hello Clive and John,

Thank you for your responses - this has certainly given me a better understanding that the job can be performed with the unit in situ.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

classiclife
Posts: 273
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife » Fri Mar 01, 2019 12:11 pm

Hello John,

Re-reading your post, I presume that there is no necessity to disturb the manual shaft at all, with it staying in situ throughout the operation ??

Hopefully Clive, will benefit from the above positive news as well !!

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

johnwager
Posts: 46
Joined: Thu Feb 11, 2016 3:26 pm
Location: Thundersley, Essex

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by johnwager » Fri Mar 01, 2019 10:23 pm

Hi Richard
There is no need to disturb the shaft, or to lower the gearbox at all.
John

classiclife
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Location: Ridgewood - East Sussex
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Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife » Fri Mar 01, 2019 10:53 pm

Thanks for confirming, John, much appreciated.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

classiclife
Posts: 273
Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
Contact:

Re: V8-250 saloon: BW35 - Manual Shaft Oil Seal

Post by classiclife » Fri Mar 15, 2019 3:41 pm

Folks,

Just thought I would update the thread; having completed the job successfully.

As per the advice John gave, it is a straight forward task to replace the seal with the g/box in situ. It is necessary to remove the exhaust heat shield plates to provide better access which will be obvious when you tackle the job.

Once the lever assembly plate (14) is removed plus the associated bits it is then possible to hook the old seal out with ease; the shaft does not need to be disturbed.

I got a couple of seals from DMG, only 1x is required but had an extra on stand-by just in case. With the seal oiled and positioned on the shaft, it is then a simple case of pushing it in to place using a sleeve - I used a thin piece of oversize tube. The oil seal is now in situ and "square", the removed assemblies can then be reconnected accordingly.

Job done. and one less leak to see on the garage floor :D !!

My grateful thanks to John and I hope the above will beneficial for Clive and others who are / may be considering this task at some stage.

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

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