Flexible hose to cylinder pipe

[S3ute]

Hello again from Sherwood.

A quick technical question concerning the rigid pipe that connects the front wheel cylinders to the flexible brake hose on a Series 3 Land Rover. My 2.25 litre is being fitted with brakes from a 2.6 litre truck.

For the dual line models there are two different part numbers specified for 4 and 6 cylinder trucks - NRC4257 and NRC4258 for 6 cylinder and NTC4794 and NRC4795 for 4 cylinder. The pairs being LHS/RHS.

The 6 cylinder variants appear to be hard to get cf the 4 cylinder variants. What is the actual difference between the two?

I can’t really see why they would be technically different (eg. between a 4 cylinder 109” and 6 cylinder 109”) in terms of length or diameter because they are routed from the back of the swivel housing to one of the two wheel cylinders and presumably these are the same dimensions regardless of the engine size?

Where is logic failing me here?

Cheers,

Neil

[S3ute]

Hello again from Sherwood.

A quick technical question concerning the rigid pipe that connects the front wheel cylinders to the flexible brake hose on a Series 3 Land Rover. My 2.25 litre is being fitted with brakes from a 2.6 litre truck.

For the dual line models there are two different part numbers specified for 4 and 6 cylinder trucks - NRC4257 and NRC4258 for 6 cylinder and NTC4794 and NRC4795 for 4 cylinder. The pairs being LHS/RHS.

The 6 cylinder variants appear to be hard to get cf the 4 cylinder variants. What is the actual difference between the two?

I can’t really see why they would be technically different (eg. between a 4 cylinder 109” and 6 cylinder 109”) in terms of length or diameter because they are routed from the back of the swivel housing to one of the two wheel cylinders and presumably these are the same dimensions regardless of the engine size?

Where is logic failing me here?

Cheers,

Neil

Hello again.

Still haven’t resolved this query.

Any insights out there?

Cheers,

Neil

[JDNSW]

The six cylinder has wider brake shoes and drums than the four (although in late production they are the same as the six). This means that, since the centreline of the shoe is the same relative to the cylinder, the cylinder is moved sideways relative to the mounting point of the brake backing plate. This means that the pressed shape of the backing plate is different.

I would assume that this means the pipe has to be a different shape to conform to this. I haven't looked, but it is possible that the wheel cylinders are different as well, although I don't think so.

[67hardtop]

I think that due to the wheel cylinders being fitted slightly deeper on the 6 cyl backing plates, the pipes are just a little bit longer where they screw into the wheel cylinders, to clear the backing plate, so they dont rub on the plate.

[S3ute]

The six cylinder has wider brake shoes and drums than the four (although in late production they are the same as the six). This means that, since the centreline of the shoe is the same relative to the cylinder, the cylinder is moved sideways relative to the mounting point of the brake backing plate. This means that the pressed shape of the backing plate is different.

I would assume that this means the pipe has to be a different shape to conform to this. I haven't looked, but it is possible that the wheel cylinders are different as well, although I don't think so.

Thanks.

[S3ute]

I think that due to the wheel cylinders being fitted slightly deeper on the 6 cyl backing plates, the pipes are just a little bit longer where they screw into the wheel cylinders, to clear the backing plate, so they dont rub on the plate.

Thanks.