G5 Rear brake "snatch"

crawsue · Post by **crawsue** » Fri Sep 29, 2006 7:43 pm

The final (!) part of my G5 jigsaw ,now that the clutch is sorted ,is to eliminate the "bang" which occurs on the 1st. application of the rear brake.Today I loosened the sprocket side spindle nut and "centralised" the brake,this didn't make much of a difference,so removed the wheel.The brake linings seem quite fresh and have not fully bedded-in,but have a nice gradual champfer.The central locking nut was not tight in the accepted sense.The locating slot shows significant wear ,which might be the problem ,combined with the lack of tightness in the locking nut--I will get the slot "tightened" with some weld and then file out to size.Anything else I can look at while the wheel is out? Gratefull or any suggestions.One or two nice looking AMC 'bikes on EBAY at the minute.

lawrence · Post by **lawrence** » Fri Sep 29, 2006 11:14 pm

Sounds to me as if you are on the right track

Don Madden · Post by **Don Madden** » Sun Oct 01, 2006 9:30 pm

If there is any play in the brake anchor the brake will "bang" each time you apply the brake in the opposite direction. So, if you back the bike out of a parking spot & apply the brake, the first time you use it in the forward direction, the anchor will slam against the stop. Cheers, Don.

crawsue · Post by **crawsue** » Mon Oct 02, 2006 7:04 pm

crawsue · Post by **crawsue** » Mon Oct 02, 2006 7:08 pm

OOOPS! Got it all re-assembled as suggested this afternoon,all seems to be working fine.

michael_s · Post by **michael_s** » Sat Nov 05, 2011 10:43 am

After taking out the rear wheel I noticed that the anchor (the slotted cylinder) on my bike is revolvable (pivoted) in the brake plate - is this correct?
A previous owner "secured"the anchor with a kind of selfmade clamp (like a hose clamp) around the anchor...

BigAl350 · Post by **BigAl350** » Sat Nov 05, 2011 7:48 pm

Sounds like a first-class "bodge" or poor repair. In all of my Lightweights, apart from one, the slot in the anchor as you call it has worn and there can be the odd "bang" when applying the brake as there is a bit of a gap. I suppose this gap could be repaired by letting in more metal but it doesn't seem to be a big problem as such...

Al

quote:
After taking out the rear wheel I noticed that the anchor (the slotted cylinder) on my bike is revolvable (pivoted) in the brake plate - is this correct?
A previous owner "secured"the anchor with a kind of selfmade clamp (like a hose clamp) around the anchor...

michael_s · Post by **michael_s** » Sun Nov 06, 2011 9:17 am

Thank you, Al.
Is the locating slot-thingie meant to be revolvable?
The pivot in the back plate looks rather fragile and I cannot see much sense in it...