BradMM wrote:
Ironically, the guy who came out told me that lubricating the rollers
at the bearings was one of the causes of them wearing out because it
causes dirt and grit to stick which grinds them down. Only lube the
shafts. I'd sprayed WD40 on them many times but didn't seem to make
any difference. I wondered if that was the proper lubricant and he
said use a silicon spray.

WD40 is primarily _not_ a lubricant. It works initially pretty well,
but that is simply the result of the carrier/primary component being,
essentially, kerosene. Once it evaporates, there's very little left.
Silicone is good choice.

The problem w/ dirt is potentially a problem, granted; but...
Running completely dry also causes wear altho a primary problem often is
if they have had lubricant in the past it has hardened and especially in
cold weather becomes a drag rather than an aid. Cleaning that out and
some fresh, non-stick lube will help (and may well solve the entire
problems if that's a prime cause).

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