Showing posts with label Drive train. Show all posts
Showing posts with label Drive train. Show all posts

Tuesday, August 30, 2011

Day Thirteen

     After another day of riding, the weakest points on the cartbike failed. A crash knocked off the front handlebars, they were luckily going unused, but it just shows that zip ties aren't that strong. Also, the plastic that held the crank set away from the bottom bracket collapsed, leaving that back at square one. After two rides to and from the hardware store, Clydefrog and I got the right brass washers (cheaper than stainless steel, and thicker), and finally resolved this problem, though another spritz of lube was necessary. 








Back to square one.








Very Bad






Only one of these was the right size (it was the big one.) Measuring is important!






Fixed!


Tuesday, August 23, 2011

Day Four

      Today's the day that it's finally starting to come together. My friend Clydefrog came over, and he had the crankpullers that I didn't, as well as a bit (lot) more bicycle knowledge than I do. He came, and instantly diagnosed the bottom bracket as a cartridge, which was music to my ears. We took the drive-side crank off, and the entire crank set with it. However, we almost stripped the crank and nearly ruined the crank puller. But, we persevered, and eventually got it off in one piece. 
     Before doing anything with that, I sanded down the chainstay that was wrecked by the gears, and sprayed on a clear coat to keep the rust out, and it looks a lot better. 
     Then, to avoid the chainrings digging into the frame again, we needed to rig up something to keep it away from the frame. Clyde, coming from the school of thought of having things look good and work well, wanted to put some washers on the crank nut, however, that didn't solve the problem, the crank still wanted to move inward on the bottom bracket. Me, coming of the school of thought of having things work, well or not, I punched a hole in a bottle cap, sawed it off, and then slid it on the axle to keep the crank out. After a couple drops of lube, it works. I understand that this is only solving a symptom of the greater problem, but one of my goals is to do this on as little money as possible, if any at all. 
     The derailleur limits had to be changed, since the crank set was further out. I decided that realistically, we'd only be using the lowest gear, so I just took it off. Tomorrow I'll need to finish cleaning the chain. Overall, today was a very productive day.






The Chainstay after the crank set was taken off, really rusty and awful-looking.





After sanding it off and spraying on a clear coat, it doesn't necessarily look good, but it looks better, and is better.





Intense enough? Clydefrog's feet make a Cameo.





Nut and washers, wasn't used



The bottle cap on the axle. I used a 1/2" Spade Drill Bit, (the cutting one) and just rotated it by hand util I got a 1/2" hole. The plastic I used was soft enough that I didn't have to use a drill.






After sawing it off. If I can find washers large enough, I'll replace it, because while there would be a bit more friction, but it'll be more sturdy.





It's no longer dug into the chainstay, but this picture's also evidence of how much more I need to do on the chain.





Another angle of above.
 




Derailleur!

Saturday, August 20, 2011

Day Five

     I cleaned the chain today, and got it back into working order, but this bike is having fewer and fewer redeeming qualities. The rear derailleur works fine, though I might have to adjust the limits, that's an easy task. I believe the front derailleur is in the same condition. However, the bottom bracket will take more work than previously anticipated, I'm hoping it'll just involve tightening the cranks to realign it, but it's shaping up not to be that simple. Additionally, the middle chainring is wrecked, and right now I'm trying to decide whether it would be worth ordering a new one. I might not, considering that there are parts that I'll won't be able to do without on this bike, and a chainring is not one of them. I will most likely just take the second ring off, adjust the chainline and derailleur, and cross my fingers. This all depends on the condition of the small chainring, if it's wrecked, it'll change my game plan.




Super rusty.













One segment cleaned, about eight to go.





Not factory clean, but it's a vast improvement. A wire brush and a bottle of Rock and Roll work wonders.


 Horrible crack. It's beginning to scare me how someone let their bike get in this shape, there appears to be something, that alone would be serious enough to have to get the bike repaired, wrong with every part group.


I have no idea how this bulge even happened.

Tuesday, August 16, 2011

Day One

     I was on my way home after picking up some lube, and thanks to construction in the street, I had to turn a block early, and I chanced upon the perfect candidate for the cartbike's frame and drive train. An old GT Outpost, light, multi-geared, 26-er.








(Right) The bike after hosing it off, leaning to dry, and drain. (See the bottom picture)







I foresee some plaid duct tape and a bottle of rubbing alcohol in this seat's future.





Rusty, rusty, rusty chain.











To emphasize my point, chains do not zigzag in that fashion under anything resembling normal circumstances.








The main problem here is that the bottom bracket has come loose, there's a gap between the left crank and it, where it should be flush. This caused the chainrings to dig into the chain stay and become immobile, cause large amounts of sadness, and non-biking scenarios.







There's a better shot. If anything, that will make or break this bike, and decide whether I'm using it for parts or not.







Those are some gorgeous break pads, and the breaks themselves are just as pretty.





The cassette looks alright, it's just the chain that's got it rusted static. It's coasters work fine though.





This bike has THREE triangles. Not two, but three. Apparently that tiny triangle makes it one million times better.





I loaded it into the trunk, and it bled all over. Strange liquids came out of the frame and covered the back of the car. It may well be cursed...










Foreboding.