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I have a Challenge Folding Bike,unable to remove crank arm.

I have a Challenge Folding Bike & I am unable to remove 1 of the crank arms. I have removed the bolt but it still won't move,It as if it is welded on. PLEASE HELP.

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The info you need is at this site:http://www.parktool.com/repair/byregion.asp?catid=59&imageField2.x=18&imageField2.y=5 Please let me know if this helps.

Posted on Nov 20, 2009

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3 Answers

How do I remove the crank arms


You need a tool like this
Bike Bicycle Cycle Crank Extractor Remover Puller

Sep 23, 2016 | Cycling

Tip

Bottom Bracket & Spindle Replacement of LeMond RevMaster


Part 1 Video Discussing the Dis-assembly & Inspection of the Bottom Bracket & Spindle for a LeMond RevMaster Bike

  • This Part 1 video will demonstrate how to inspect and adjust or remove and replace the bottom bracket and spindle on your Lemond Revmaster
  • Tools needed for this procedure:
    • 8mm Allen Wrench or Socket
    • Cotterless Crank Puller Tool
    • Lock Ring Removal Tool
    • Bottom Bracket Tool
    • Phillips Screwdriver
    • 4mm Allen Wrench
    • Bungee (optional)
    • Rubber Mallet
    • 7/8" Wrench
  • To begin remove the belt cover, there are four screws
    • You will need a 4MM Allen wrench
  • Now remove the two screws on the back from the opposite side of the bike
    • You will need a Phillips screwdriver
  • Now position the crank arm as seen in the video and remove the belt cover from the bike
  • Before removing the drive belt, tighten the brake assembly so that the flywheel is locked in place and loosen the torque on both bolts using an 8mm Allen wrench or socket
    • Do not remove them at this time only loosen them by a half a turn or so
  • Using a 7/8" wrench loosen the belt idler
  • Now use a 4mm Allen wrench to loosen the tension adjustment bolt completely, but do not remove it from the frame
  • Now remove the drive belt
    • To aid in this process you can use a bungee to slide in behind the belt at the top, as shown in the video
  • Then pull away from the bike while spinning the crank arms
  • Now remove both crank bolts with a 8MM Allen wrench or socket
    • Removal of the crank bolt on the left side of the bike is the same as removal from the right side
  • Now remove the crank arms with a crank arm puller, threading the outer portion into the crank arm as shown in the video
    • Be sure to thread the outer portion in as far as possible to prevent damage to the crank arm threads or the tools threads
    • Use a 7/8" wrench to make sure the outer portion is threaded in completely
    • Now spin the handle clockwise to press the crank arm off of the bike
    • Be careful when the crank arm comes off as if you are not holding it, it can fall in the floor
    • Also use the wrench to loosen the tool before removing the crank arm from the unit
    • Now you can unthread the tool from the cranks arm by hand after removing the crank arm from the bike
  • Next inspect the bottom bracket cups for looseness, to do this use the bottom bracket tool by hand to see if you can turn either of the bearing cups
    • To further verify the adjustment of your bottom bracket use a rubber mallet to tap lightly on each side of the spindle to check for movement from side to side, if you have movement, or one or both of the bearing cups is loose, you need to re-adjust the bottom bracket. If you are only inspecting the bottom bracket and did not find any need for adjustment you would re-assemble the bike at this point
  • Once the crank arms are removed look closely at the spindle
    • It should have defined edges and be smooth
  • As you can see by the video our spindle needs to be replaced
  • Next you will need to remove the lock ring
    • The lock ring is around the bottom bracket cup on the left side of the bike
      • In the video is an example of a lock ring
    • To use the lock ring tool you slip it over the lock ring using the three notches and torque the lock ring in the proper direction
      • This one needs to be turned counter-clockwise to loosen
    • Then remove the lock ring by spinning it off the bearing cup
  • Next you will need to use the bottom bracket tool to remove the bottom bracket cups
    • Begin with the left side
      • Slip the tool into the splines of the cup and loosen
        • For stubborn bottom brackets use a 5/16"-24 x 2" bolt and some washers with a 1-1/4" wrench
          • Slip the tool into the splines and thread the bolt with the washers into the spindle
          • Get it snug but not completely tight
      • Now use the wrench to turn the cup counter-clockwise for the left side and remove it completely
    • Remove the cup from the right side now
      • Slip the bottom bracket tool into the splines of the cup and turn it clockwise to loosen
        • For stubborn bottom brackets use a 5/16"-24 x 2" bolt and some washers with a 1-1/4" wrench
          • Slip the tool into the splines and thread the bolt with the washers into the spindle
    • If you cannot get the cups loose with this method try turning the bike on its side to get better leverage as shown in the video
  • This concludes the dis-assembly and inspection procedure of the LeMond RevMaster bottom bracket & spindle
  • Click here to see Part 2, re-assembly and installation to complete the replacement procedure
Video of Bottom Bracket and Spindle Replacement Part 1 Dis assembly LeMond...

on Feb 19, 2015 | Lemond Revmaster Lemond G-Force Digital...

1 Answer

The steel on the crank arm of my Monark 817e exercise bike broke, how do i remove it, it has no cover/nut/bolt/washer holding it to the axel


It's very difficult to find someone familiar with a particular model of a particular brand of exercise bike, but I pulled up some pics that seem to show that yours can have one of two types of crank. One is called a "one-piece" crank. Typically it is removed by unscrewing parts from the left side after removing the left pedal (left-hand/reverse threads). You may have to remove the housing to access and remove the parts. The other is a 3-piece cranks, and the arm will have a plastic cover at the axle. If you remove that dust cap you will see a bolt underneath. One has to remove that bolt and then use a specialized tool (crank extractor) to remove the crank arm. Check with a bike shop (take in the unit or take some good pics) for replacement.

Aug 05, 2016 | Monark Cycling

2 Answers

Next power x. How do I remove the pedal arm?


To remover the pedal arm. You need to remove a comer it has. Then usa a 14mm die to remover the screw. Then you'll need an extractor to pull the arm appart.
If you don't have an extractor it Will be hard.

Jan 05, 2016 | Cycling

1 Answer

Recumbant bike makes aclunking sound whe pedaled


follow this steps and fix it. God bless you

1

Prepare to oil by filling a grease gun with lithium grease. Check your owner's manual for the exact type of grease for your unit.

2

Locate where it is you need to lubricate. Focus on the bearings, free-moving joints and attachments with moving parts such as handle bars, wheels, pedals arms and guide rails. Go to each location one by one when greasing.

3

Unfasten the bolts or screws that hold the joint or attachment that you wish to lubricate.

4

Grease each bolt and screw liberally. Tighten each bolt and screw back into its place when finished.

5

Wipe away any excess grease
Loose Pedals

1

Kneel next to the left side of the elliptical's base. Use the Phillips screwdriver to tighten the two screws located in the center of the left pedal.

2

Use the Allen wrench to remove the bolt securing the left pedal arm to the pedal leg and body arm. Use the Phillips screwdriver to remove the screw securing the rear end of the pedal leg to the crank arm.

3

Pull the end of the pedal leg free of the crank arm. Wipe the crank arm clean, then apply a fresh coating of machine grease or silicone lubricant. Replace the end of the pedal leg back onto the crank arm and use the previously removed screw to secure it back into place.

4

Join the front end of the left pedal arm to the ends of the pedal leg and body arm. Use the previously removed bolt to connect the pieces together.

5

Move to the right side of the elliptical and repeat the above steps on the right pedal arm

Dec 09, 2013 | Exercise & Fitness

1 Answer

Problem removing crank arm off of a mojave gulch bycicle from huffy


There's a special tool called a "crank puller" that has to be threaded in to the crank arms that are on your bike in order to remove them. An inexpensive version of the tool will cost around $10- which is about the same price as a shop would charge you for the work.
If you *do* want to remove them yourself, please be sure to thread the crank puller in perfectly straight and very, very carefully (backing in all the way out and starting over if you encounter resistance). Once you have threaded it almost all of the way in to the crank arm by hand, grab an adjustable wrench and tighten it down before you spin the handle to push the arm off of the bike. (If you fudge it and damage the threads inside the crank arm, you will have to pay a shop to bash them off instead- another special tool is used for that.)

Nov 27, 2011 | Huffy 26 In Ladies Mojave Gulch Bike

1 Answer

How to remove the crank set and install it


There are 3 bolts to remove on the left crank (side without the gears): 1 - the main large cap in the center of the arm (this requires a special round tool supplied by shimano with the cranks, or your local shop can sell you one), and 2 bolts holding the arm in place. Remove all three completely. If the arm still will not come off easily, then take a large screwdriver and work in between the bearings and the crank arm and gently pry off. The trick is too only move a little then go to another section and move another small amount. until the crank arm wants to loosen. Once you pull the left side arm off, the right side will pull out of the bottom bracket, Just pull straight out. the BB spindle is attached to the right side crank arm. To install reverse the instructions. Works the same on Shimano cranksets of this type.

Dec 08, 2010 | Shimano XTR Hollowtech II Mountain Bike...

2 Answers

The left arm of the cranck don't come out,so i can't take the cranckset off the bottom bracket.Every bolt it's already untight. Thanks!! Stefano


There are 3 bolts to remove: 1 the main large cap in the center of the arm, and 2 bolts holding the arms in place. Remove all three completely. If the arm still will not come off easily, then take a large screwdriver and work in between the bearings and the crank arm and gently pry off.

The trick is too only move a little then go to another section and move another small amount. until the crank arm wants to loosen. The most likely culprit is a small black piece of plastic that is holding up the works.

Nov 23, 2010 | Shimano XTR Hollowtech II Mountain Bike...

1 Answer

Left pedal broke can i get replacement?


All depends on if you stripped the crank arm, you may have to replace your crank arm if you rode with a loose pedal. Pedals are sold in pairs, and there are 2 sizes, a one piece crank is 1/2" and 3 piece crank is 9/16", take your bike to the bike shop and they will tell you if you need a new crank arm or not. It will do no good to just replace your pedal if there is a bad crank arm thread, it will not hold.

Sep 26, 2010 | Cycling

2 Answers

The crank arm is stripped on the left side of the bike


Yes, the crank-arm could be replaced.
1.You would need to remove the flat nut holding the crank to the frame. And then take out the bearing.
2. A special open-ended wrench is required to remove this nut. Please visit your local bicycle shop for a new crank-arm, and the required tools, also.
3. Put in new crank-arm and its bearing.
4. Grease the bearing.
5. Tighten nut.
6. Give it a test ride.

Dec 10, 2009 | Schwinn Mesa Gs Mountain Bike

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