Then I thought I started to hear something. I started to vary things
to give me more clues. I varied the engine speed, with and without clutch
engaged. This time the noise seemed to continue even with the gears disengaged.
It seemed that the cab was a little warmer than the ambient temperature.
Since I have no heater, that means either the engine or me is giving off
more heat. Next, I thought I detected a slight burning smell, and I pulled
over to check things out. I thought it strange that the heat and smell could
have traveled from the rear axle to the cab. It would seem more like the
problem was somewhere in the engine compartment. Of course, it could also
be that the engine was working harder to overcome a bad rear axle bearing.
I found nothing obvious, and there was nowhere else for me to go, so I continued.
After a while I came to the Canadian border, and as I pulled into the border
station, the guard made a comment about the burning smell. Good! At least
I knew I wasn't imagining things. He decided he wanted to search the cab,
so while he did that, I looked under the engine compartment. Bingo! The
generator was smoking, and I knew right away that the little grinding noise
I had been hearing was indeed bearings, but not the ones I had feared. The
generator bearings had burned out. It sounds bad, but to me it was great,
because I had a spare generator, and this was a problem I could handle.
The border guard also noticed that my gas cap was missing. I must have left
it at the station in Skagway. I stuffed a rag in it to prevent dirt from
entering the gas tank. After the guard finished his search and questions,
I pulled on through and put on my mechanic hat to go to work. I spread out
a tarp and weighted it down with rocks on the corners. After a little while
I emerged with the burned out generator and took it apart on the tarp. Yep,
burned bearings, or bushings, really. This one was scrap.
This was the brand new generator that I had installed in Anchorage, just
1,000 miles ago. There are several possibilities for why the bearings burned
out. One, was that it was my fault, because I had been told (and believed)
that the two holes at the front and rear of the generator were oil holes,
and that periodically I should oil them. It turns out, these holes are meant
for grease to be injected at the factory, and shouldn't require any further
lubrication. So that might have caused a problem, but I doubt it, because
I also oiled the old generator, and it was doing fine after about 4,000
miles. Another explanation is that the misalignment of the generator bracket
might have caused abnormal wear of the bearings. However, if this were the
case, I would have expected more wear on the front bearings, the bearings
by the pulley. Instead, it was the rear bearings that were damaged. Finally,
it may have just been a defective generator.
Whatever the reason, I regreased the old generator and installed it. I continued
down the road a while, stopping every twenty minutes or so to feel the bearings
on the generator. They were hot, but maybe they are supposed to be that
way. I feared that perhaps I was supposed to use high-temperature grease
rather than the normal green grease that I have. I have had no further problems,
so I expect that it is OK.
I arrived at Carcross, and made the decision to continue the journey home.
I drove late into the night, trying to get to the next town on the map,
which was Teslin. I arrived around midnight to find that the only two motels
in town were closed and the next one was about 80 miles away. I was tired
and didn't fancy driving another two hours, so I drove just to the other
side of the bridge next to town and explored a little side road for a place
to camp. After dead ending at a couple of houses, I found a place next to
the bridge and set up tent by the side of the river. Trucks roaring by on
metal bridge made lots of noise from time to time, but I had no trouble
falling asleep.