Is this my servo?
Discussion
I drive a 1965 Sunbeam Alpine. If the engine is running (or just after I turn off) the brake pedal is smooth for ¾ of the travel then it feels like it is going over a lump. If the engine is off the pedal travel is smooth all the way down and it stays like that until I start the car again.
I am pretty sure that if I changed the brake pipes and took the servo out of the system it would be smooth all the way down.
Could this be corrosion inside the servo? I am imagining a line of rust and the piston and seal needing a bit more 'push' to get over it. Is that the problem or something else?
Puddles
I am pretty sure that if I changed the brake pipes and took the servo out of the system it would be smooth all the way down.
Could this be corrosion inside the servo? I am imagining a line of rust and the piston and seal needing a bit more 'push' to get over it. Is that the problem or something else?
Puddles
Your photo is a remote servo, so is part of a larger system.
The feel on the pedal is mostly the master cylinder, that's the one connected directly to the pedal.
If there a a lumpy feel then it's possible that its related to the remote servo cylinder.
However the most worrying thing is you describing the "travel of the pedal".
The brake pedal should be firm and very close to the to top it's travel, it should not "travel" at all, and certainly no more than 1/4 of the way down. this is regardless of engine assist on the servo.
You almost certainly have at least 1 leaking cylinder, you need to do a full investigation of all the parts, include the pipes, joints, hoses and inside the drums, arouns the cylinders behind the dust seals and all over the front calipers too, again behind dust seals.
leaking brakes are bad. Pedal should be firm. With engine off, should be solid, running should have a little spring but not any "travel".
The feel on the pedal is mostly the master cylinder, that's the one connected directly to the pedal.
If there a a lumpy feel then it's possible that its related to the remote servo cylinder.
However the most worrying thing is you describing the "travel of the pedal".
The brake pedal should be firm and very close to the to top it's travel, it should not "travel" at all, and certainly no more than 1/4 of the way down. this is regardless of engine assist on the servo.
You almost certainly have at least 1 leaking cylinder, you need to do a full investigation of all the parts, include the pipes, joints, hoses and inside the drums, arouns the cylinders behind the dust seals and all over the front calipers too, again behind dust seals.
leaking brakes are bad. Pedal should be firm. With engine off, should be solid, running should have a little spring but not any "travel".
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