Slave and Master Cylinders for a 2A non-servo shared res

*** WARNING: There's a lot to wade through in this thread so before and if you do... my problem turned out to be a batch of faulty master cylinders with bad threads tapped on the inlet ports.. ***

I've ground to a halt fitting new master cylinders and clutch slave.

I have a 1969 Series 2A SWB RHD Land Rover.

I ordered this clutch slave cylinder, described as fitting Series 2 and 3:
https://www.paddockspares.com/591231g-clutch-slave-cylinder-trw-lucas.html

The S2/2A hose I ordered to go with it is long enough but doesn't fit that cylinder, the threads are too small:
https://www.paddockspares.com/pm035-clutch-hose-braided-stainless-steel-s11-11a.html

The S3 hose I also ordered as a test DOES have the right threads but is too short:
https://www.paddockspares.com/pm036-clutch-hose-braided-stainless-steel-s111.html

Can anyone give me a make and part number for a clutch slave (and hose?) they've recently fitted to a 2A where the slave is upright on the driver's side of the bell housing (RHD)?

And then there's the master cylinders..

I ordered CV style master cylinders described as for a Series 2 & 3:
https://www.paddockspares.com/master-cylinder-s2-2a-trw-lucas.html

But the thread on the inlet port of these master cylinders is too small to accept the larger (I think, 7/16?) fitting on the 1/4" pipe coming in from the shared brake/clutch fluid reservoir, as most Series 2 and 2A vehicles have.. Can anyone give me a make and part number for a master cylinder they've recently fit to a non-servo shared reservoir series landy that accepts the larger 1/4" pipes? (I could make up some 3/16 pipes, with the right fittings, but the old CV cylinders I'm taking off accepted the larger fittings on the 1/4" pipes so I want to understand what's going on before I resort to changing the inlet pipes to suit these new cylinders I've bought. For all I know at this point I've bought the wrong cylinders..)

I know it's a long post. I'm hoping someone has done this recently and might be able to pull out some part numbers that worked for them. Cheers.

RTC 3386 for the pipe. Bearmach do a set for the master/slave.

RTC3386. If it's the same as the brakes' flexi hoses I've tried one and the ends are too small for that cylinder's port. The old hose I'm taking off does not fit the new cylinder either. Note also the 2/2A braided hose I linked (second link above) is a steel version of RTC3386 - it's the right length but the threads are wrong for that slave. (RTC3386 was on the packaging when it arrived.)

What are you saying Bearmach do a set of?

2a Master and slave.

Cheers tottot. As the bee gees once said, you win again.

Another long post but maybe one day in a galaxy far far away these part numbers will help someone.

Bearmach Aftermarket Cylinders

Clutch Slave Cylinder arrived from Bearmach today (https://bearmach.com/clutch-slave-cylinder-br-1084). It's a cheap one, the rubber boot feels loose and flimsy compared with the TRW Lucas one - but the 2A clutch hose fits this one!

Master Brake Cylinder also arrived from Bearmach today (https://bearmach.com/brake-master-cylinder-br-2226). Again, a cheap one, rubber boot loose and flimsy compared with the TRW Lucas - but the fittings on my 1/4" pipes from the shared reservoir fit this one!

Parts and Part Numbers
The OEM slave (591231G) and OEM master (90569126G) cylinders I bought both have G on the end of their part numbers. The Aftermarket master I got from Bearmach today that has the right thread on the inlet port is part number 90569126, the same part number but with no G. Does this G suffix mean 'OEM', or does it relate to something that could have told me the inlet threads would be different? If the OEM and Aftermarket should be identical, should I be sending these TRW Lucas cylinders back saying the inlet threads are WRONG? I checked the OEM master cylinder Bearmach offer (https://bearmach.com/catalogsearch/result/index?q=brake master cylinder&app=86) and it also has a G on the end - which makes me think while it might be better "quality" it'll also have the wrong thread on the inlet port!

For the slave cylinder, I ordered the wrong part - not helped much by the Paddock website which described it as "Vehicle For Series 2 & 3". Paddock do sell the right slave cylinder, the one Bearmach sent me, part number 266694 (https://www.paddockspares.com/266694-clutch-slave-cylinder-s11-11a.html) but the item description is different, "Clutch slave cylinder-S11/11A", you have to know to look for it. tottot knew it was there..

Options
For the slave it looks like it'll be the Aftermarket one I fit because the 2A length braided clutch hose actually fits it and the only OEM one I can find and afford is the TRW Lucas that only accepts the shorter S3 clutch hose. (The only OEM 266694 I can find is £100 - https://www.ebay.co.uk/itm/ROVER-SERIES-2-2A-OEM-GIRLING-CLUTCH-SLAVE-CYLINDER-266694G-/372195736289).

For the masters I have a choice between:

1. Aftermarket masters with the right inlet thread for my 1/4" inlet pipes
2. OEM masters with the "wrong" inlet thread, and make up some 3/16" inlet pipes to suit

And I don't know if having 1/4" inlet pipes is more important to me than having OEM master cylinders. What really grates is the masters I took off were Girling branded and had the right bloody inlet threads! WHY are the inlet threads on new OEM masters different!?

g is usually better quality and definition varies it can be genuine or replacement bearing in mind most of the original manufacturers no longer exist as such just in name used to badge bought in parts

jamesmartin said:

g is usually better quality and definition varies it can be genuine or replacement bearing in mind most of the original manufacturers no longer exist as such just in name used to badge bought in parts

Click to expand...

Cheers. Does sound like the threads should be the same between the G and Aftermarket parts then.

scottonthefen said:

Cheers. Does sound like the threads should be the same between the G and Aftermarket parts then.

Click to expand...

yes they should, but ive found with some parts that some brands no longer fit certain applications

It looks like it might turn out these TRW cylinders I got from Paddock are part of a bad batch.

Someone at Bearmach has gone to the trouble of pulling one of their OEM (also TRW) and one of their Aftermarket cylinders off the shelf and screwing in some 7/16 brake nuts to the inlet ports - and sending me a photo! The threads are and should be the same. (Sorry to say Paddock have not yet even replied about the issue.)

Fingers crossed and two OEM master cylinders on order from Bearmach..

My OEM TRW master cylinders arrived from Bearmach today. Same part number and packaging as the other ones I got elsewhere with the bad inlet threads. The inlet ports on these are the correct thread for the 7/16" fittings on my 1/4" inlet pipes. Hoozah!

After doubting everything else it looks like the problem was a bad batch of cylinders..