dibbons
Well-Known Member
This rebuilt master cylinder was installed more than ten years ago (photo #1). Recently, I found it empty and the brake pedal going all the way to the floor (the '65 Valiant Signet convertible it belongs to had been parked and not driven for a long, long time).
On the end of the piston (just above to where the screwdriver is "pointing" in photo #3) there was a small, dark glob of some kind of muddy substance. Inside the master cylinder bore at about the same place, the bore is now pitted.
According to the '65 FSM (blow-up diagram on page 5-9), a washer is to be used between the end of the piston and the primary cup (the primary cup is placed on the right side of the spring in the photo). I did not find this washer upon dis-assembly of the previously rebuilt master cylinder, I don't know what purpose it would serve, and I don't know if it being left out contributed or not to the failure of the master cylinder.
On the end of the piston (just above to where the screwdriver is "pointing" in photo #3) there was a small, dark glob of some kind of muddy substance. Inside the master cylinder bore at about the same place, the bore is now pitted.
According to the '65 FSM (blow-up diagram on page 5-9), a washer is to be used between the end of the piston and the primary cup (the primary cup is placed on the right side of the spring in the photo). I did not find this washer upon dis-assembly of the previously rebuilt master cylinder, I don't know what purpose it would serve, and I don't know if it being left out contributed or not to the failure of the master cylinder.
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