Series 2 New brake cylinders

Got myself some new ones as the old ones are had it, rusted solid
Do i fit them straight out of the box or do you clean off the 'grease' inside and put proper brake grease instead? (The red rubber stuff)

I would coat the dust seals in red.

As above, often the grease that comes with them has gone dry/stiff while in storage.

I'll clean all the stuff off and start again then, I've got plenty of red

Pack the red grease under the rubber dust cap. Stops them rusting up again with our delightfully salted roads.

Bobsticle said:

Pack the red grease under the rubber dust cap. Stops them rusting up again with our delightfully salted roads.

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And the piston on the dry side of the seal, i expect

kermit_rr said:

And the piston on the dry side of the seal, i expect

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One hopes so.

i think i've been a bit dim!!
which is front, which is rear? bigger diameter pistons with the stronger internal spring on the front?

Pretty sure bigger is front.

I’ve. Just put 2 new wheel cylinders on front passenger side , I put the red grease all over seal and piston , one leaked , one didnt but had been sitting in garage for 5 years
one was silvery TRW other steel like ones above which leaked , just ordered new

steve2286w said:

I’ve. Just put 2 new wheel cylinders on front passenger side , I put the red grease all over seal and piston , one leaked , one didnt but had been sitting in garage for 5 years
one was silvery TRW other steel like ones above which leaked , just ordered new

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Twin cylinders on the front?
Your book says front and rear should be the same, my book says different and the part numbers match what I've got
I took them out of the boxes and now i can't remember which is which

kermit_rr said:

Twin cylinders on the front?
Your book says front and rear should be the same, my book says different and the part numbers match what I've got
I took them out of the boxes and now i can't remember which is which
View attachment 300859

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Twin wheel cyl set up is for the front s on the 109, the slaves only have one piston compared to the normal two pistons.

Steves book says June 77 onwards, so series 3.

I've studied photos on eBay..
Definitely the bigger cylinder on the front, the part numbers match and difference is obvious
I've had them back to front.. like.. forever!!
Never had a braking problem though

pologies always assume everyone talking series 3 as that’s what I got, but agree, when you brake, need bigger brakes at front as load transfers to front and so you dont have rear wheel skids, my goal is to get all 4 wheels to lock up on gravel when I get my new wheel cylinders