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Autolycus

Member Since: 16 Oct 2013
Location: Derby
Posts: 6

Bracket on 110 front diff

This bracket was attached (two BSF set screws) under the nose of the front diff casing on my 1991 200tdi 110 csw.

What's its function? The track rod had been rubbing quite hard on one of the "jaws", and more lightly on the bottom of the jaw. There's no hydraulic steering damper - is this intended as a friction damper?

Thanks.

Kevin

Click image to enlarge

7th Mar 2015 10:53pm

GREENI

Member Since: 22 Aug 2010
Location: staffs
Posts: 10360

It's to offer 'support' if it gets knocked, to stop the rod bending. If yours has been rubbing, something ain't right, or someone has put thicker rods on and not binned the 'bracket'.

7th Mar 2015 10:56pm

I Like Old Skool

Member Since: 23 Feb 2015
Location: Manchester
Posts: 765

1994 Defender 110 300 Tdi ST Coniston Green

Just to try and prevent any 'bendage' if the off-road stuff gets too rough. As said, if the track rod is rubbing then it must be bent. I have just binned mine after fitting a Simmonites Dam bar over the original tube.

7th Mar 2015 11:09pm

Autolycus

Member Since: 16 Oct 2013
Location: Derby
Posts: 6

Thank you both, very much.

I'll check the tube for straightness, and I'll either apply BFI or add one to my next order. Can even BP get these wrong?

Kevin

8th Mar 2015 9:52am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16879

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

I think you'll find the setscrews are UNF not BSF (60º thread form not 55º).

9th Mar 2015 12:09am

smb

Member Since: 15 Jan 2013
Location: Cheshire
Posts: 1232

2011 Defender 110 Puma 2.4 XS CSW Santorini Black

It could be the angle of the photo, but that bracket looks as if it has been bent downwards which would probably account for the wear on the upper inside face.

9th Mar 2015 1:03am

I Like Old Skool

Member Since: 23 Feb 2015
Location: Manchester
Posts: 765

smb wrote:
It could be the angle of the photo, but that bracket looks as if it has been bent downwards which would probably account for the wear on the upper inside face.

That is how they are made, and it is a chunky piece of extruded aluminium, I expect the bolt heads would snap before the bracket bent at that point.

9th Mar 2015 10:45am

Autolycus

Member Since: 16 Oct 2013
Location: Derby
Posts: 6

Thanks for the further comments.

The bracket is "bent" on its top face, but, as ILOS says, it looks as though it was made like that.

I'd have expected UNC or ISO metric threads, but they're definitely 3/8 BSF, 20tpi. I wonder if the diff housing has had to be re-tapped from 5/16 or M8? One of the mucky-trucky's many mysteries.

Kevin

10th Mar 2015 8:59pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16879

I've just looked them up on Microcat and you are absolutely right, they're 3/8" diameter x 20tpi, 5/8" long, BSF setscrews. I had naively thought they'd be UNF since the propshaft bolts and the studs that secure the pinion housing in the axle case are 3/8 UNF.

I wonder if the Defender is the last production vehicle in the world to use Whitworth, Unified and ISO thread forms all on the same component!

10th Mar 2015 11:44pm

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