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donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

WHich rear calipers to order?

Well, I've had "one of those days". Following my fight with shock absorber bushes, I went to fit the new rear calipers and found...... they didn't fit either. Too fed up for words.

So I think I may have done this to myself, ordering 300Tdi calipers, and forgetting that the car has a more recent axle.

The existing casting - the one that came with the axle I suspect - is larger/wider here - the white line in the middle of the circle:

Click image to enlarge

New caliper is narrower:

Click image to enlarge

So, if I put the new caliper over the disc, the bolts won't line up with the threaded holes in the axle.

There's not much of a difference. I did measure but can't remember now - maybe 5mm or so - but enough that it won't fit. Same on both sides.

THe axle was a 'new take off' 2009 job - but as I've no VIN number I'm finding it hard to decide which parts to order. Can anyone help out? As always, I do appreciate it. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

14th Mar 2020 8:14pm

donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

or.... after googling some more .... could I have the wrong disc?

Have the rear discs been the same for ever, or did they change? Specifically would the disc itself move inwards or outwards relative to the end of the axle?

I don't know if ABS will complicate things - my car doesn't have this, and I don't think the new axle did either. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

14th Mar 2020 9:39pm

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2651

I think post-2002 ish the rear pads on 110s were made thicker to alleviate premature wear, which would mean wider calipers?

14th Mar 2020 9:39pm

donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

I didn't think to measure the width of the slot for the pads - didn't get past the point where I realised it just wasn't going to fit over the disc in the first place.

Its occurred to me that another option is for me to get a piston and seal kit and just refurb the calipers that fit - but the inner pistons are well and truly seized on both calipers. I don't have a compressor or 'air' to blast them out.

For the price of a caliper, it will be so much easier to buy new - if I knew which to get. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

14th Mar 2020 10:02pm

donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

well that was interesting.

Existing caliper has a 53mm slot for the pads, the new one is 46mm.

Click image to enlarge

Click image to enlarge

So, lookimg very much as if I have ordered the earlier ones by mistake. A part number for the 2009 one would be ideal! Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

14th Mar 2020 10:28pm

epictrail

Member Since: 20 Sep 2013
Location: High Wycombe
Posts: 395

https://www.lrworkshop.com/diagrams/land-r...rums-discs

15th Mar 2020 9:04am

donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

^^^^ Thanks very much. I found my way to that page myself and it's looking like SMC500260 and 270 are the things I'm after.

I'll wait till Monday and speak to my parts shop. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

15th Mar 2020 9:39am

epictrail

Member Since: 20 Sep 2013
Location: High Wycombe
Posts: 395

Worth comparing prices. I went AP last year when I changed mine but my mechanic says the Britpart ones are identical.

https://www.lrdirect.com/SMC500260-Calmper/?keep_https=yes

15th Mar 2020 3:39pm

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