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Cristoforo

Member

• Jul 3, 2019

• #1

Hi everyone do any of you know if the 109 4 cylinder front back plates and the 109 6 cylinder / V8 back plates are the same and its just the slave cylinders that are different? I have a set that I think has come off a 109 v8 and I want to use them to upgrade my 88 front brakes so I want to use the the 4 cylinder tls brake cylinders but I'm not sure if they will fit, thank you all

 

tottot

Well-Known Member

• Jul 3, 2019

• #2

You can not use the 4 cylinder brake cylinder's The 109 uses twin leading cylinders, They have a single piston one on each shoe. The whole unit can be fitted.

 

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Cristoforo

Member

• Jul 3, 2019

• #3

There are two types of 109 brakes they are both tls and 11 Inch one though is I think 3" wide that is used on the 6 cylinder engine and V8 models the other is 2 inch wide and used on the 4 cylinder engines I wondered if the brake back plates are the same but now I think not as when you look at the back of the wheel cylinders one is round ( 6cyl and v8) and the other is oblong

 

tottot

Well-Known Member

• Jul 4, 2019

• #4

The 3" ones are known as the "one ton" brakes as they were for the one ton carrying capacity 109's.

 

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Wildefalcon

Well-Known Member

• Jul 4, 2019

• #5

Definitely different. Different part numbers, plus, as said above, the hole for the wheel cylinders is different.

 

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rob1miles

Well-Known Member

• Jul 5, 2019

• #6

And I bl;eive very hard to get hold of the back plates, drums and shoes are around.