View unanswered posts | View active topics It is currently Thu Mar 28, 2024 10:05 am



Reply to topic  [ 4 posts ] 
GT Brake restoration in the UK 
Author Message
User avatar

Joined: Tue Sep 20, 2016 6:38 am
Posts: 138
Location: Sydney
Car(s): Bellett GTR, Bellett GT Group N, Isuzu Lotus,
Reply with quote
Isuzu Club recently received a cry for help from the UK. The question was: Brake rubber kits fir front disc calipers and rear brake kits urgently required PLIZ.

Tom's answer was:
The front disc brake kit rubbers for PR91 are same as Jaguar XJ6 and E type centre piston with both piston and seal able to be used. (FDB52 Dunlop Sumitomo callipers). The original dust seals are no longer available.

If earlier Bellett GT PR90 early 1966 and before then pistons and seals are interchangeable with early E type rear callipers and are again Dunlop Sumitomo DDB 704 callipers. Again dust seals are no longer available.

FDB Calliper Pistons

There are two callipers, the early DDB704 split calliper as per the 1964 and 1965 S1 and S2 Bellett GT and homologation disc brakes and the later FDB52 calliper as fitted to all Bellett GT from 1965 to 1973. The early callipers are the same as the E Type Jaguar rear callipers both body, pistons and seals. DDB704 47x54mm.

The later FDB52 cars use a 2 x piston x 57mm (2.25”) diameter Girlock P/N 64325438 which is the middle piston in Jaguar 3 spot callipers.

Rear seals are just standard 7/8” seals

W/C Rear 7/8”

Cup P5151 - Repco

Boot P4388 - O ring alt

Kit K553s

O Ring seal OR 141216


Tue May 31, 2022 12:47 am
Profile WWW

Joined: Sun Dec 12, 2010 10:04 am
Posts: 385
Location: Boyne Island.Gladstone. Queenland
Car(s): '70 PR91,'69 PR20 x 2,'66 PR20,'65? KR20's x 2,'66 ? PR90,2012 d22 STR Navarra.
Reply with quote
Thank you julieandtom. I have had calipers at my brake specialist for quiet some time. All 4 pistons were shot.
He was concerned that the locating pin in the centre of the piston was necessary and finding a piston with a pin
and diameter required would be hard to get.
I assured him that a piston without the pin would be ok and the Jaguar pistons would fit. I did some research for a
57mm piston through Protex listings and found a few but were too high and would have to be machined down to suit.
The part number that you have given (64325438) was the closest although 1.11mm higher. With not shimming and
possible having to machine the surface of the pad would be the best way to go to have the original calipers fitted to
my car.
This has all come about because I wanted to fit the standard steel wheels onto my GT and although I haven't got GT
wheel covers to fit I have PR20 Deluxe covers (courtesy of Farmer) to go on.

For those who are interested. The DB704 have a rectangular backing with a round pad with the slot for the pin and
has a single mount at the centre top. Pendulum style. The DB52 pads are rectangle backing and pad and with a mount
point at the top corners. Similar to Gemini T series and Mitsubishi's.
Chassis number change was 4202358. 1966.

Dave.

_________________
CQGT.
I'm the Dave with the convertible.


Thu Jun 02, 2022 12:31 pm
Profile
User avatar

Joined: Tue May 10, 2011 2:23 am
Posts: 2816
Location: Melb.
Car(s): '72 Sport Bellett (imported 180912), M/B AMG A35, i30, had Belletts in past, 2 sed, 3 GT's.
Reply with quote
-------------
FDB Calliper Pistons

There are two callipers, the early DDB704 split calliper as per the 1964 and 1965 S1 and S2 Bellett GT and homologation disc brakes and the later FDB52 calliper as fitted to all Bellett GT from 1965 to 1973. The early callipers are the same as the E Type Jaguar rear callipers both body, pistons and seals. DDB704 47x54mm.

The later FDB52 cars use a 2 x piston x 57mm (2.25”) diameter Girlock P/N 64325438 which is the middle piston in Jaguar 3 spot callipers.
------------

Tom
Do you have a part number for the seals for the middle piston in Jaguar 3 spot calipers.
glenn

_________________
'72 PR60 Sport


Fri Jun 03, 2022 5:00 am
Profile WWW
User avatar

Joined: Tue Oct 28, 2008 12:17 pm
Posts: 2611
Location: Rye Park, N.S.W.
Car(s): Doris, AuntyMary, Shrek, Jimmy; GT, Wasp, Flo & Sed unrestos; 65 Elf; 82 Rodeo, 60 TX550, 72 Sport, & a Sigma.
Reply with quote
I found a new set of 4 genuine caliper pistons on Yahoo auctions. They cost me $200, and the postage was about $100 through Jayce handling house. Absolute bargain I reckon. Another set was listed straight away, and were still there last time I looked.
Thankfully Dean supplied me with a set of seals a little while back. :)
Cheers, Matt.

_________________
Life is far too short not to fill it with what you love. - Jackie French.[/size]


Wed Aug 10, 2022 9:29 am
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 4 posts ] 

Who is online

Users browsing this forum: No registered users and 18 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software for PTF.