
The big takeaway that I had was what parts wear out. The lower arm assembly had all seized
bearings and pitting on the shafts. The
upper arm had a lot of wear but would still be able to function.
I also replaced the belt on the porter cable hand held belt
sander. The drive belt would keep
slipping if there was any pressure put on it.
This was a much more frustrating repair because of the design. I actually had the maintenance department put
the belt on because I could not figure out how to do it. Most belt driven systems have a tensioning
lever to them. This does not so the belt
has to be stretched onto the two pulleys.
These belts do not stretch easily, but they do stretch a lot over
time. Mine was about 3/8 bigger in
diameter then the new belt.
Installation of the belt was a pain. What ended up working
was using an allan wrench as a lever and being ready to tighten it down as soon
as it slipped into place. It works great
now.
Here is the most frustrating part of doing the repairs,
shipping costs. There are a lot of part dealerships
but the shipping costs are usually more expensive than the part or the part is
overpriced.