Well, I'm a little stumped. I need the collective experience of the forum to help me figure this one out! Bear with my long post here...
I have a 1960 SII 109 SW and the front right brake is grabbing... in fact I can lock it up and skid pretty easily. At first it only happened with the first few applications of the brake pedal... which I attributed to condensation/scaly rust. After hitting the brake a few times it would even out. That was a few months ago. Then four days ago, it became a constant problem.
The car only has about 10k miles since restoration. It has a SIII type boosted master cylinder with integral reservoir, and everything in the brake system is basically new.
On inspection of the brakes:
-No leaks/oil contamination.
-Even brake wear, lots of lining remaining.
-Correctly assembled shoes/springs.
-Quality wheel cylinders (Girling).
-Cylinders move freely, no apparent binding.
-Drums are intact, maybe a slight ovalization, not bad.
-Springs are strong and intact.
-Snail cams and steady posts intact, working fine.
Both brakes were disassembled and re-greased, reassembled and adjusted.
In fact, each front brake has been adjusted at least ten times in the last two days. I even slackened the grabbing front right brake a little more and left the front left a little "tighter" to see if it would even out... no effect.
I replaced the front left flex hose on the chance it was collapsing or narrowed internally. Another LR parts vendor is within a short drive of me, and they mentioned they'd seen some bad flex hoses recently. That did not cure the problem though.
Finally, I swapped the drums to see if the one on the right was the cause... no difference.
I haven't observed cylinder travel (right vs. left) because I haven't had a helper... but when I push them by hand they move freely with some resistance on retraction, which is normal.
I am about ready to pull all four front wheel cylinders, rebuild/replace them, purge the whole system, and swap the shoes... but before I do that I would love to hear any suggestions. I cant think how the master cylinder would cause this... I keep coming back to a wheel cylinder or line obstruction.
What do you guys think?
I have a 1960 SII 109 SW and the front right brake is grabbing... in fact I can lock it up and skid pretty easily. At first it only happened with the first few applications of the brake pedal... which I attributed to condensation/scaly rust. After hitting the brake a few times it would even out. That was a few months ago. Then four days ago, it became a constant problem.
The car only has about 10k miles since restoration. It has a SIII type boosted master cylinder with integral reservoir, and everything in the brake system is basically new.
On inspection of the brakes:
-No leaks/oil contamination.
-Even brake wear, lots of lining remaining.
-Correctly assembled shoes/springs.
-Quality wheel cylinders (Girling).
-Cylinders move freely, no apparent binding.
-Drums are intact, maybe a slight ovalization, not bad.
-Springs are strong and intact.
-Snail cams and steady posts intact, working fine.
Both brakes were disassembled and re-greased, reassembled and adjusted.
In fact, each front brake has been adjusted at least ten times in the last two days. I even slackened the grabbing front right brake a little more and left the front left a little "tighter" to see if it would even out... no effect.
I replaced the front left flex hose on the chance it was collapsing or narrowed internally. Another LR parts vendor is within a short drive of me, and they mentioned they'd seen some bad flex hoses recently. That did not cure the problem though.
Finally, I swapped the drums to see if the one on the right was the cause... no difference.
I haven't observed cylinder travel (right vs. left) because I haven't had a helper... but when I push them by hand they move freely with some resistance on retraction, which is normal.
I am about ready to pull all four front wheel cylinders, rebuild/replace them, purge the whole system, and swap the shoes... but before I do that I would love to hear any suggestions. I cant think how the master cylinder would cause this... I keep coming back to a wheel cylinder or line obstruction.
What do you guys think?
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