2025 was not our best year

 

You might remember my '78 Polaris Cobra, pictured here back in hapier times. Today the dang thing won't run because its got no spark on the MAG side. Generally I could get spark back if I cleaned the points some. Well this year that isn't working. So I figured it was finally time to throw some parts at the issue, so far I've replaced the external coils which didn't help at all. I bought, but have yet to install, new plug wires. Since this is a points machine the wires need to be copper core, not the new fangled graphite type. 

I think the real fix will be to replace the actual ignition power coil inside the mag. I got frustrated when snow was on the ground and just parked it up. I think I'm going to haul the machine to Maine and swap it with the old '70 Ski-Doo, that needs some welding on the frame and a gas tank clean but the repairs required are straight forward.

This is actually a more pressing concern. Adam and I took the ASV out to groom, this was back in mid February. We were just about as far south as we'd need to go when Adam commented that the machine felt down on power. Pretty soon we found that while the machine would go forward it wouldn't turn right.

We farted around with it on the side of the trail for a little bit but didn't find anything so we parked it up and walked out. It was nearly a mile out. Adam brings a backpack with nine thousand pounds of tools with him and as he was still recovering from surgery I got to lug that out.

The following weekend we went back with the Tucker and dragged it most of the way out to the road.

Turns out the machine can go straight ahead fine and turn left fine but can't turn right at all. This is good because the Tucker doesn't have enough power/traction to pull the whole combination up hill at all. So as we were hauling we'd start slowing down as Adam carefully adjusted the steering wheel to find the magic point where the machine would only go forward without trying to steer. The steering on this has always been sensitive and that didn't help. 

Overall I call this recovery a win, it worked way better than I'd expected.

Another weekend and we dragged the machine the rest of the way out and got it on the trailer. This was especially frightening because the trail looped around to the right so I ended up driving up on to the trailer and just hoping it was straight enough. Most of the trip onto the trailer I couldn't see anything but the plow and sky...

Now it sits in Ben's driveway where we've made a couple interesting discoveries. Mostly that it always turns left, forward or back. This means you can go anywhere you want but you need to do it as a series of left turns. Interestingly this tells me that both drive motors work correctly, to turn left going forward the right drive motor pushes forward. To turn left going backward the left drive motor pushes backward.

The left drive motor won't push forward and the right drive motor won't push backward.

Digging into it more we exposed the pump section of the system which, the manual says, has oil pickups for the pumps that feed the drive motors. The pickups are supposedly covered with screens so right now our best bet is to clean those screens. Unfortunately the screens are underneath 35 gallons of hydraulic oil...

A new whip

 Well, a new-to-me groomer. The former operator left the club so we needed to shuffle around a little and I drew the short straw. Fortunately we had been training another operator and it made more sense to put him in the ASV which parks with the Pisten Bully. That way if he had trouble Ben would be close by to help.

Anyway this beast is a 1989 Tucker Sno-Cat 2000.

It's got a Cummins 6BT like a Dodge pickup and as you can see, 4 tracks.

I've heard it called "Farm equipment with aspirations" and that's not wrong. It's an interesting beast but not without issues. The drivetrain is really simple, the 6BT mates to a 3 speed automatic transmission and single speed transfer case. The axles are, I think, Spicer truck rear axles that pivot at the centerline of the axle. So the tracks are firmly attached to the axle and the whole axle moves. Both axles pivot so its effectively "four wheel (track) steer". This one in particular has something wrong with it and steers really hard at the limits, it also doesn't seem to steer as far as our other machine. I don't know what the issue is but its annoying.

I had terrible trouble with it icing up early on. The output of the fuel tank is right in the very bottom of the tank and I think it had some water that settled there. That water froze and in cold temps the machine would just barely run. The first time I took it out it took half an hour or more to get it warmed up enough to go out. Fortunately that run seems to have cleared the blockage. Before the second run I changed the water separator and fuel filter and it ran fine.

Some chucklehead took a side by side out in wet snow, this was real fun to fix

Driving is an odd experience, the automatic transmission has its work cut out for it making shifts with all the drag of the machine. A few times I've been fooled into thinking that we were losing power when in reality I just needed the machine to downshift. The 4 tracks are *relatively* nimble as long as you're going forward, it'll slalom fairly well. The 4 track system is nowhere near as nimble as either of the 2 track machines we have though and it's REALLY slow in reverse. I plowed snow with it one day and it took forever. I'd have been better off getting the ASV started, waiting while it warmed up and then plowing...

The most positive thing is that it's fast. It'll pull a pretty good load of snow at 10mph where the ASV can only do serious work in slow gear, 5-6mph. This is important for the run the Tucker is assigned which goes from Winchendon, MA to Barre, MA. The first trip was down and back and took something like 9 hours. That one we had to open a bunch of gates and of course deal with the machine being frozen. The second run I only went one way and made it in about 4.

Angie went on the second run with me and said she liked the Tucker more than the ASV. I'll put that down to it having been years since she was in the ASV...

Broken Groomer Part 1

Well, its not a dead sled but groomers are not without troubles.

Early on last season Ben had trouble with the Pisten Bully, none of the hydraulics at the front of the machine would cooperate. He couldn't lift the blade or manipulate it in any way. A little investigation revealed water in the hydraulic oil. After running the engine for half an hour or so the fluid would warm up enough so the water would go liquid and everything would work until the next time. This, of course, was a big issue. We swapped the fluid (its actually Automatic Transmission fluid, ATF) from the reservoir but the lines and pistons still had significant water. It was looking to be expensive (and a lot of work) to swap all the fluid when I hit upon an idea, could we boil the fluid to drive the water out? Thus began the saga of the weirdest thing I'd ever done with a Coleman stove:

In the post script we actually pulled and replaced the fluid 3 or 4 times, we'd draw the fluid out, boil off the water, let it cool, put it back in the machine and let it cycle for awhile and then repeat. Actually to be 100% honest we had 2 sets of fluid so I could be boiling off water while another batch was picking up water. This seems to have cured the issue, we also pulled the filter out of the fluid and actually submerged it in boiling fluid to get the water out of it, I think that helped a lot, I suspect water had gotten trapped in the filter and was being slowly released back into the dried fluid.

Chris and Harold, meanwhile, had both had trouble with tracks on the Northern and Southern Tuckers. I guess I haven't mentioned the Tuckers. When most people think "Snow-Cat" they're thinking of a "Tucker Sno-Cat". The club owns two, here's a terrible picture of the Northern Tucker.

I've heard a Tucker called "Farm equipment with delusions of grandeur. As near as I can tell its a 1 ton, rear engine pickup with tracks. They make several variations for personnel carriers but ours is the common type, its bigger than my ASV but smaller than the Pisten Bully. Power comes from a Cummins 4BT, the drivetrain is an automatic transmission with essentially 2 rear axles, the front axle pivots to steer.
I don't have much experience with them but so far the weak point seems to be the tracks, we replace/repair a lot of tracks on our Tuckers, like 2-3 a year.

Anyway with Ben, Chris and Harold all having troubles I was pretty pleased to get to the end of the season having zero breakdowns and feeling pretty smug, sadly that smile would get wiped off my face all too soon.