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05-18-08, 04:17 PM
Background:
My old man is one of those guys who believed that if tight was good, tighter was better. As a result, I could use broken bolt extractors at an age when most other kids were learning the difference between flat-blade and Phillips head screwdrivers.
Situation:
While I've become quite smitten with the Motobecane, there has been a hitch in the drivetrain on the drive side when you hammer on it or grind up hills. I figured it was a not-quite tight enough crank bolt, and snugged it down. No joy.
I then pulled the cranks and discovered that the spindle had been greased. I cleaned it up and re-installed the cranks. Worked for about 5 miles, then the hitch was back.
Pulled the cranks again, mounted them 90 degrees from where they had been, and torqued the crank bolts to 30 ft/lbs. Still no good.
In times of stress you revert to your earliest training. I dug through my parts, found a couple of crank bolt washers, installed them between the crank and the bolts, and wound on. Got to 30 ft/lbs and kept going. At 40 ft/lbs I though 'just one more little pull and.....SNAP!':eek:
http://i128.photobucket.com/albums/p183/top506/spindle1.jpg
http://i128.photobucket.com/albums/p183/top506/spindle2.jpg
Top
My old man is one of those guys who believed that if tight was good, tighter was better. As a result, I could use broken bolt extractors at an age when most other kids were learning the difference between flat-blade and Phillips head screwdrivers.
Situation:
While I've become quite smitten with the Motobecane, there has been a hitch in the drivetrain on the drive side when you hammer on it or grind up hills. I figured it was a not-quite tight enough crank bolt, and snugged it down. No joy.
I then pulled the cranks and discovered that the spindle had been greased. I cleaned it up and re-installed the cranks. Worked for about 5 miles, then the hitch was back.
Pulled the cranks again, mounted them 90 degrees from where they had been, and torqued the crank bolts to 30 ft/lbs. Still no good.
In times of stress you revert to your earliest training. I dug through my parts, found a couple of crank bolt washers, installed them between the crank and the bolts, and wound on. Got to 30 ft/lbs and kept going. At 40 ft/lbs I though 'just one more little pull and.....SNAP!':eek:
http://i128.photobucket.com/albums/p183/top506/spindle1.jpg
http://i128.photobucket.com/albums/p183/top506/spindle2.jpg
Top