Series 2 New brake cylinders

[kermit_rr]

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)

 

[Wildefalcon]

I would coat the dust seals in red.

 

[tottot]

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

 

[kermit_rr]

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

 

[Bobsticle]

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

 

[kermit_rr]

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

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

 

[Bobsticle]

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

One hopes so.

 

[kermit_rr]

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?

 

[lynall]

Pretty sure bigger is front.

 

[steve2286w]

 

[steve2286w]

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

 

[kermit_rr]

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

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

 

[lynall]

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

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.

 

[kermit_rr]

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

 

[steve2286w]

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