Reverse threads on left side crank bolt??
06-02-12, 01:34 PM
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Reverse threads on left side crank bolt??
I'm getting ready to swap crank arms on a Terratrike, and am wondering if the left side crank bolt is reverse threaded as is the left side pedal??? I don't want to be tightening it when I'm trying to untighten it!! Thanks for a quick answer!
Wes
Wes
06-02-12, 01:49 PM
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There a couple oddball cranks that use left-hand threads on the crankarm removal threads, but they don't apply to your Terratrike.
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06-02-12, 01:49 PM
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Wes- Not typically. But with a trike any thing goes
Andy.
Andy.
06-02-12, 08:44 PM
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Thanks, guys-
I've got a particularly stubborn bolt on one side... the left, of course! Think its going to take an impact wrench to get it out.... :-(
Wes
I've got a particularly stubborn bolt on one side... the left, of course! Think its going to take an impact wrench to get it out.... :-(
Wes
06-03-12, 09:35 AM
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Wes- Good trick is to secure the crank arm to a chain stay with a toe strap wrapped around a couple of times. Andy.
06-03-12, 01:44 PM
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06-03-12, 01:51 PM
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The power beam or whatever it's called should suffice.
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06-09-12, 05:47 PM
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Well, I took the trike to my lbs, and the owner/head mech just shook his head when he looked at it... said he believed the factory had cross-threaded the bolt for it to be tight... his 8mm allen socket was loose in the head- I'd actually stretched the bolthead in my efforts to get it loose. He didn't have his impact wrench in the shop Friday to try that- so was out of luck there.
Put it back on the U-Haul trailer and took it to my local machinist friend... between his air impact wrench and a 5/16" allen socket it came right out. Why was it so stubborn??? TerraTrike put red LockTite on the threads!! And, torqued it down to ridiculous levels- as once I got the crank bolts out, I literally had to beat the wrench on the crank removal tool with a hammer to get the crank to loosen... both sides.
Boo, hiss!!
A 6 month old bike should not be this tough to disassemble.
Wes
Put it back on the U-Haul trailer and took it to my local machinist friend... between his air impact wrench and a 5/16" allen socket it came right out. Why was it so stubborn??? TerraTrike put red LockTite on the threads!! And, torqued it down to ridiculous levels- as once I got the crank bolts out, I literally had to beat the wrench on the crank removal tool with a hammer to get the crank to loosen... both sides.
Boo, hiss!!
A 6 month old bike should not be this tough to disassemble.
Wes
06-09-12, 06:38 PM
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Also, next time, don't beat the tool with a hammer. Slip a long pipe over the end of the handle and exert steady force - leverage is your friend. Hitting with a hammer applies a shock load which may affect more than you think.
06-09-12, 08:55 PM
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Also, next time, don't beat the tool with a hammer. Slip a long pipe over the end of the handle and exert steady force - leverage is your friend. Hitting with a hammer applies a shock load which may affect more than you think.
06-10-12, 10:44 AM
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my giant defy 3 is the same way!!! I was swapping pedals out, and the right side was super easy to do, came off with ease, so I go to the left side, and i have my 15mm wrench on the pedal bolt, and its not budging!! I grabbed a cheater bar for leverage and it still wont move. Im hoping its not stripped out, because i have seen some aluminum shavings! But I think the bolt was just ran to far into the crank and thats what im hoping the shavings are from. PLEASE HELP
06-10-12, 03:09 PM
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You ARE trying to go clockwise with the left pedal, correct??? Just making sure you're aware that the left pedal is reverse threaded..
Wes
Wes
