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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Brake caliper replacement
After my issue with the brake caliper piston being pumped out too far (my mistake) and now the piston wont go back in. I think I will have to remove the caliper to fix it.
Maybe this is time to replace the caliper and have the old one for a rebuild?



Click image to enlarge



Good practice to replace both so the braking effort should be more equal given new calipers?

A quick look yesterday there are two multi spline bolts holding the caliper to the hub - is this correct?
and then its a case of remove the brake pipe.
Remove the caliper swap the new one, and refit pipes/bolts etc?

I have braided hoses on the front so I wont be able to clamp these up? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950101 22nd Apr 2022 10:48am
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Retroanaconda



Member Since: 04 Jan 2012
Location: Scotland
Posts: 2520

Scotland 
Those pistons are unserviceable anyway so I would say a new pair of calipers would be your best bet.

Yes unbolt it all, remove the pipe and refitting is the reverse of removal, plus bleeding the brakes. You will need a good fitting bi-hex socket for the bolts as they are very tight and have threadlock.

Braided hoses can’t be clamped no, so plug it with something clean to minimise fluid loss.

Be prepared to break the brake pipes if the unions are seized when undoing them. Worth changing the short solid pipes on the calipers anyway if they’re old. Also worth spotting the brake pipe bracket if not already done, so that future work on the hub can be done without bleeding the brakes.
Post #950102 22nd Apr 2022 10:55am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Cheers RA.
Any idea what size bi-hex socket is needed?

The brake pipes got replaced a good few years ago with new copper ones(automec)

Also worth spotting the brake pipe bracket ? Spotting?

Now is the hunt for calipers. Quite a price range on the likes of Ebay (LR Trade parts, Transglobal trading, Ribble valley 4x4 etc.) 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950104 22nd Apr 2022 11:01am
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Retroanaconda



Member Since: 04 Jan 2012
Location: Scotland
Posts: 2520

Scotland 
Sorry that should have said slotting - making the hole into a slot so that the pipe can be removed without breaking into the hydraulics.

I think it’s 13mm for the caliper bolts from memory but definitely check before buying anything as my memory is awful!

Paddocks and other places sell proper AP-branded calipers for not too much money. Personally I would avoid the cheaper unbranded aftermarket ones.
Post #950106 22nd Apr 2022 11:10am
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3141

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
I think he meant slotting. So can slide out the brake pipe without undoing the pipe, and have to bleed again. But I could be wrong. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #950107 22nd Apr 2022 11:11am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Slotted - that makes sense Smile

1 x AP brake caliper £135 with VAT.(Paddocks) 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950109 22nd Apr 2022 11:18am
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5408

2006 Defender 110 Td5 USW Zermatt Silver
Post #950110 22nd Apr 2022 11:26am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Cheers, not sure I can stretch to £290+VAT Sad 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950111 22nd Apr 2022 11:29am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4350

United Kingdom 
In the same position John. New calipers on the way, not with SS pistons unfortunately. Justification is impossible at that price when you are a student Shocked Rolling Eyes
Post #950115 22nd Apr 2022 1:01pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Sad

Were did you order from/Which ones did you go for?

I was heading to Bala Railway in the 110 tomorrow, but now my mate is playing taxi. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950117 22nd Apr 2022 1:12pm
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kenzle8a



Member Since: 12 Feb 2020
Location: None
Posts: 1074

 
I did my 110 TD5 with the OEM branded ones from Rimmer Bros, both came stamped as AP

Vented

Right

https://rimmerbros.com/Item--i-SEB500460P1

Left

https://rimmerbros.com/Item--i-SEB500470P1

Went on perfectly with my LOF brakes.
Post #950119 22nd Apr 2022 1:38pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3141

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
excossack wrote:
Cheers RA.
Any idea what size bi-hex socket is needed?


My 1988 is 1/2". I tried on the puma, but 1/2" is a tight fit. Unsure if because they are a bit rusty, or if they changed to 13mm which is slightly larger than 1/2".

The pistons are unserviceable, but maybe the calipers are still ok.
remove the pistons and check the bore.. if all good, a new set of stainless pistons on your refurbished calipers will be a good and cheaper option. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #950121 22nd Apr 2022 1:50pm
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4350

United Kingdom 
excossack wrote:
Sad

Were did you order from/Which ones did you go for?

I was heading to Bala Railway in the 110 tomorrow, but now my mate is playing taxi.


Ok, the best deal I have found is from JGS4x4

Front 110 - https://www.jgs4x4.co.uk/defender-front-br...ted-discs/

Rear 110 - https://www.jgs4x4.co.uk/defender-110-130-...iper-pair/

I am afraid they will not be as long lasting as the equivalent with SS pistons, however at around £215 for all four calipers it gets my student wallets' mark of approval. I do plan to give the new calipers a lick of paint to prolong the exterior condition though. At least even if they do not work very well in 5 years they may still look good Rolling with laughter

It is also worth replacing the bolts as well - https://www.jgs4x4.co.uk/defender-discover...r-bolt-x5/

Obviously if your discs and pads need replacing then this is the time Thumbs Up

Wonder if JGS4x4 would do a forum discount?! Rolling Eyes


Bala Shocked that is pretty much the next village over from me Rolling with laughter It is going to be busy tomorrow I suspect, the tourist season has really kicked off.
Post #950125 22nd Apr 2022 2:15pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Cheers. The fronts look to be stamped AP ?
I have just ordered a set of bolts so I can make sure I have the right size socket..
I was in the middle of doing pads which is why I am in the muddle I am in now Sad

Discs will need doing in the near future.
JGS4x4 forum discount.... mmmm would be handy Smile I have used them a few times.

I suspect it will be busy at the railway. Hopefully we can get done what need to do sharpish. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950127 22nd Apr 2022 2:25pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
[quote="geobloke"][quote="excossack"]Sad



Wonder if JGS4x4 would do a forum discount?! Rolling Eyes

No they dont Sad 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #950130 22nd Apr 2022 2:44pm
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