Thread: series 2a dual circuit master cylinder convertion

Does it have rear drums?

If yes just get the whole pedal box, booster and master cylinder off a 110 County. You may have to extend the cut out on the top of your series footwell for the brake pedal but all the bolts should line up.

Otherwise if you have rear discs you need a Defender all disk MC.

Diana

diana
fanks for the infos
this is going to be inspected by a mods certifier to b blue plated
they were strongly suggesting new components
is there much cutting of the fire wall?
cheers coopers

Depending upon your model of SIIa there may not be any cutting at all.

It is just the hole on the top side of the footwell where the brake pedal pokes through. The 88" and 4 cyl 109" had the early design brake pedal box/master cylinder bracket where the brake and clutch holes are the same size. The six cyinder had a brake booster on the pedal box and the slotted hole for the pedal needs to be longer. From about 1970 most of the firewalls have the longer hole even the 88s and 4cly 109s.

The engineer should not even be able to see the cutting as it is all contained within the brake pedal box.

The only other problem you may have is the space on the inner mudguard for the booster and master cylinder which protrude forward. You may need to acquire the RHS inner mudguard for the suffix H SIIa or SIII.

The image below is a 110 firewall, but the holes are the same. In most SIIa and SII firewalls the holes are the same size as the clutch one in this pic. You have to extend the hole to be the same as the brake one in this pic.