Thanks again for the replies. I succombed and fitted new shoes. The problem is better, but not resolved. Could it be that the shoes need to bed in a little first? If this doesn't fix it, maybe I'll change the wheel cylinders...then the drums? Could be that the drums have worn out of spec - I didn't check this. But then again new shoes would have compensated I would have thought.
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As Andrew said,the adjusters don't work properly on these(never have),so they will take up the slack,but won't do that last bit of adjustment that is needed to get the brakes spot on.I have to go though this performance with my Sierra when the handbrake will not hold properly,I would much prefer manual adjusters on the backplate,or may convert to discs at some point.
Renewing the cylinders will make no difference,if the drums are excessively worn there would be a huge lip.
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As sierraman said,they have never worked properly, so I always adjusted these manually, never had any problems doing so....but do file/grind off that lip on the drums,its easier to get drums on/off
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Could it be that new drums are required?
Even brand new shoes won't work efficiently if the drums are too worn.
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I'm still thinking that the self-adjusters aren't functioning correctly because the h/b cable levers aren't returning fully to their stops.
That was the usual reason for these adjusters not to work correctly - and if they don't work, neither does the handbrake, whatever you do with the cable.
If the drums are worn to a very unusual degree; then the adjusters will be at full travel.
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The adjusters must be clean and DRY;if lubricated won't adjust properly.
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