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49r · 07-08-2017, 01:18 AM

In my '49 F1 6 years ago I fitted new wheel cylinders, master cylinder, brake lines and brake linings. Thereafter I replaced the brake fluid annually to avoid condensation issues (not using silicon fluid). New front drums were fitted 10 years ago.

Recently the front right brake suddenly began grabbing under heavy braking at speed, under light braking at walking pace speed, but with no grabbing at higher speeds with normal braking.

Adjustment checked, no leaking cylinders or oil on brake linings. I also checked for cracked drums, which had been my reason for fitting new drums after a cracked RH drum caused a violent grab - fortunately in my driveway.

I replaced both front brake cylinders and problem solved. I am surprised at the effect of what I assume was a sticky RH cylinder. The brake cylinders have 'USA' stamped on them, so assume were USA made.

Anyone experienced similar issues?

07-08-2017, 01:18 AM	#1
49r Senior Member Join Date: Jul 2011 Location: Wellington New Zealand Posts: 308	F1 front brake grabbing In my '49 F1 6 years ago I fitted new wheel cylinders, master cylinder, brake lines and brake linings. Thereafter I replaced the brake fluid annually to avoid condensation issues (not using silicon fluid). New front drums were fitted 10 years ago. Recently the front right brake suddenly began grabbing under heavy braking at speed, under light braking at walking pace speed, but with no grabbing at higher speeds with normal braking. Adjustment checked, no leaking cylinders or oil on brake linings. I also checked for cracked drums, which had been my reason for fitting new drums after a cracked RH drum caused a violent grab - fortunately in my driveway. I replaced both front brake cylinders and problem solved. I am surprised at the effect of what I assume was a sticky RH cylinder. The brake cylinders have 'USA' stamped on them, so assume were USA made. Anyone experienced similar issues?