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How to take the sprocket and pedal arm off? - Cycling

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There should be a large nut holding the sprocket to the frame. first remove the pedeal rfom the side where the nut is. Then remove the large nut counterclock wise. remove the washer and behind the washer is a ring of ballbearings. It should be easy to remove after that. Hope this helps.

Posted on Mar 18, 2011

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Posted on Jan 02, 2017

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Drive Hub, Spring Pulley & Chain Replacement for Steppers


Video about the Drive Hub Replacement Procedure for Stairmaster Steppers

  • This videocovers replacing the spring pulley, the step chain and the drive hub assembly on the Stairmaster steppers
  • Tools needed:
    • Snap Ring Pliers
    • Tip Kit for Snap Ring Pliers
    • Socket Wrench
    • 7/16" Socket
    • 7/16" Wrench
    • Needle Nose or Standard Pliers
    • Safety Goggles
  • Begin by disconnecting the spring
  • Do this by pulling up on the spring and unhooking the spring from the frame post
  • Next, using the snap ring pliers and proper tips, remove the snap ring from the spring pulley shaft
    **Important: Be sure to wear safety goggles when working with snap rings**
  • Remove and inspect the spring pulley for any flat spots replacing the pulley if necessary
    • Flat spots develop over time and can result in roughness in the pedals
  • On the side that the pulley was just removed, slowly press the pedal down
  • Remove the step chain retainer brackets (if equipped) using the 7/16" wrench, 7/16" socket and socket wrench
  • Once the retainer bracket is removed, the spring can be lifted up over the drive sprocket and disconnected from the chain
    • The spring is opened at one end to allow for maneuvering over the link
  • Using the standard or needle nose pliers, remove the master link attaching the step chain to the pedal arm
    • Place one jaw of the pliers against the open end of the clip (if installed correctly, the open end of the clip is opposite the direction of chain travel) and the other jaw of the pliers against the far side of the nearest rivet coming through the keeper link; and squeeze pliers together
    • This should pop the clip free allowing you to remove it from the master link
    • Next remove the link bar
    • Finally remove the master link disconnecting the chain from the pedal arm
  • Inspect the new step chain making sure all the chain links flex
    • Manufacturer recommends lubricating the step chain with 30W motor oil using a clean rag to remove any excess
  • Attach the new step chain to the pedal arm reversing the steps taken to disconnect the chain
  • Relieve tension on the opposite spring by lifting up on the spring and unhooking it from the frame post
  • Slowly press the pedal down
  • Feed the spring around the pulley and lift the chain up over the sprocket to move it out of the way
  • Disconnect the remaining two bolts from the drive hub assembly
  • Lift the drive chain over the sprocket and pull the drive hub from the frame
    • As the drive hub assembly starts to develop problems, you may feel clicking, hear some grinding sounds, or a pedal may stick in one position (which usually happens on one side); All of which are indicators of a worn drive hub assembly
    • The drive hub can be replaced as a complete unit
      • The drive hub consists of (3) sprockets
        • Two one way clutch sprockets that drive in one direction and slip in the opposite direction which are for the step chains
        • A larger sprocket that spins either direction and is for the drive chain
    • An inspection of the drive hub can help determine need for replacement
          • If either of the one way clutch sprockets slip in both directions, they need replaced
          • If there is a catch in any of the sprockets in any position, then it likely needs replaced
  • Reinstall the drive hub the same way it was removed
  • Slip the drive chain over the drive sprocket before mounting the hub assembly to the frame
    • The drive hub assembly on the SC916 stepper only has 4 bolt positions. The drive hub assembly on the 4400 and 4600 steppers has bolt holes all around the hub allowing the hub to be rotated for chain tension adjustment. The SC916 stepper has a preset tension and the adjustment is no longer necessary
  • Once the drive hub is bolted to the frame, reinstall the step chains on each side
  • Place the free end of the step chain (opposite the pedal arm connection) up over the step chain sprocket
  • Lift up on the pedal and pull down on the step chain
  • Place a hand on the sprocket keeping the step chain from feeding back and allowing the pedal to drop
  • Grab the spring with your opposite hand and join the spring to the step chain
  • Once the spring is attached to the chain, press the pedal down again
  • Reinstall the spring pulley and the snap ring onto the pulley shaft
  • Lift up on the pedal and pull the spring to route through the pulley, hooking the spring onto its frame post
  • Repeat these steps to attach the step chain and spring on the opposite side
  • Reinstall the step chain brackets (if equipped) making sure all bolts face the same direction
  • This concludes the video demonstration of replacing the drive hub, spring pulley and chains on the Stairmaster steppers

Spring Pulley Chain Drive Hub Replacement Video for Stairmaster Stepper...

on Feb 25, 2015 | Stairmaster Exercise & Fitness

Tip

Drive Hub Assembly Replacement for Stairmaster 4000PT Stepper


Stairmaster Stepper Drive Hub Assembly Replacement
  1. Remove the side covers.
  2. Remove the step chain retainers.
  3. Supposrt the pedal arm. Unhook the pedal arm return spring from the spring hanger. Lift the step chain up and off the clutch sprocket and lower the pedal arm to the floor. Repeat on the other side.
  4. Remove the snap ring from the left end of the drive shaft. WARNING: To reduce the risk of eye injury, wear eye protection when removing snap rings.
  5. Remove the drive chain.
  6. Remove the sprocket and other small parts from the left side of the hub assembly.
  7. Slide the drive shaft to the right, out of the hub assembly. If you remove the right-hand clutch sprocket form the drive shaft, do not confuse it with the left-hand clutch sprocket.
  8. Loosen and remove the two remaining bolts and nuts that hold the hub assembly to the frame. Remove the hub assembly.
  9. Inspect the drive shaft, bushings, thrust washers, and clutch sprockets for excessive wear or pitting. Replace any worn components.
  10. To reinstall the hub assembly, carefull reverse the disassembly procedures. Be sure that the right- and left-hand clutch sprockets are positioned correctly; the wide shoulder of the sprocket should be facing away from the hub on both sides.
  11. Chain Tension. The drive shaft is mounted in an eccentric hub. Rotate the hub so the marked hole is in the 12 o'clock posistion, lining up four holes in th hub with the four holes in the frame. Use this hub position when reinstalling the drive chain since the distance between the drive and the transmission shafts is at a minimum. The hub is in the proper position when the drive chain has a total of 1" to 1-1/2" of play, up and down, at the slackest point in the chain. If it is necessary to increase the tension or tighten the chain, rotate the hub counter clockwise until the chain has proper tension.
  12. Reinstall the covers.

How to Repalce the Drive Hub Assembly on Stairmaster 4000PT

on Feb 25, 2015 | Stairmaster 4000PT Stepper

1 Answer

Pedal broken off at sprocket wheel


You will need a removal tool for reversed threads. 1st you will have to find the kit from a bike dealer or a auto parts service dealer. Remind them it is reverse threads( make sure of this from the bike manufacturer). Most (ARMS/Pedals) are reverse threads. 2nd you will have to drill the pedal bolt to the size of the re tractor that is in the kit( kits usually have , drill bit, re tractor and instructions.) 3rd make sure the threads are not damaged. if you need further help please contact me. thank you

Jun 28, 2011 | Cycling

1 Answer

I need to remove the front pedals and arms and front sproketts


On the side oposite the sprockets,is a thin nut it holds that whole assembly together.An adjustable wrench should work.

May 12, 2011 | Schwinn Cycling

Tip

Mechanical System Troubleshooting for Stairmaster 4000PT Stepper


  1. Remove the side covers. WARNING: TO REDUCE THE RISK OF INJURY, DO NOT OPERATE THE MACHINE WHILE THE COVERS ARE REMOVED. DO NOT DEPRESS OR RAISE THE PEDALS WHILE ANYONE'S HANDS ARE INSIDE THE MACHINE.
  2. Remove the Poly-V belt and inspect the belt for cracks, fraying or any other unusual or excessive wear.
  3. Spin the alternator pulley to check the bearings. Replace the alternator if any clicking or grinding noises are heard.
  4. Inspect the alternator pulley for wear.
  5. Tighten the transmission pulley set screw to the flat side of the transmission output shaft.
  6. Remove the drive chain and inspect the chain for frozen links. Replace a chain with frozen links.
  7. Tighten the transmission drive sprocket set screw to the keyway in the transmission input shaft.
  8. Spin the transmission drive sprocket input 1 complete revolution. The transmission pulley output should turn 19 revolutions. Replace the transmission if any clicking or grinding noises are heard during rotation or the drive ratio is not 19 to 1.
  9. Remove the step chains and return springs from the main frame of the machine.
  10. Inspect the step chains for frozen links and the springs for corrosion. Replace a chain with frozen links and replace a corroded spring.
  11. Make sure that the step chain connection points pivot freely and have no vertical play.
  12. Remove the pedals, pedal arms, and leveling arms and lubricate according to the maintenance section of the manual.
  13. Verify that the clutch sprockets of the hub assembly spin freely in the forward direction and lock in the reverse direction.
  14. Inspect the hub assembly for wear. The drive shaft sprocket should not move up and down or side to side.
  15. Clean and lubricate the drive and step chains with 30W motor oil.
  16. Reinstall all parts, ensuring the proper tension of the Poly-V belt and the drive chain.

Stairmaster Mechanical System Troubleshooting for 4000PT

on Feb 25, 2015 | Stairmaster 4000PT Stepper

1 Answer

My right pedal on my 4600 cl goes right to ground i belive the bushing is bad on the leveling arm the left side pedal is good and i nice and tight on the shaft where the right side was loose do u think the...


Why does one pedal drop on my Stairmaster Stepper but the other pedal operates correctly? Stairmaster Steppers, How to Troubleshoot when one Pedal Drops (Loses Resistance) while the Other Pedal Operates Correctly
  • If one pedal drops while the other operates correctly on your Stairmaster stepper, this problem commonly occurs when the drive sprocket on one side or the other becomes defective
  • Usually, when one drive sprocket fails, the other isn't too far behind
  • The best approach to resolve this problem is to install a new hub assembly
Why does one Pedal Drop on my Stairmaster Stepper

Dec 05, 2010 | Stairmaster 4600PT Stepper

1 Answer

I had to take off the rear weel of my falcon apache mountain bike to get it in my car o travel from my grandparens home to mine but i cant get the back weel gear arm back on. how do i do this??


By the "gear arm" I assume you mean that part of the rear derailer that the chain zig-zags through. This arm moves in two ways. It moves in and out (toward the wheel and away) as you move the shift lever - which is how it changes gears, by moving the chain onto different sprockets (gears). It also moves forward and back (toward the front and back of the bike) under spring pressure. This forward and back motion is necessary to take up the slack in the chain when you are using the smaller sprockets (the smaller the sprocket, the "higher" the gear). When the wheel has been removed, this arm moves forward (under spring pressure) as far as it can to take up all of the slack in the chain. All you have to do is grasp this lever and pull it toward the back of the bike, allowing the lever and the chain to pass behind the sprockets (gears) as you pull the wheel back into it's position. You can safely pull this arm forward and back at any time without doing any damage. One more tip-- I find it a little easier if you first put the shift lever in a "middle" gear position. Then when you pull the wheel into place, you should aim to put the chain on a middle sprocket. You don't have to hit the exact correct sprocket as you can simply lift the rear wheel and turn the pedals forward (after installing the wheel) and the chain will move to the correct sprocket corresponding to the setting on the shift lever.
Good luck! Please vote if you found this helpful. Al K

Oct 14, 2010 | Falcon Cycling

1 Answer

Hi trying to re grease the pedal sprocket bearings on my Ross Rock Machine mountain bike. I got off the pedal arm on the right side but can't figure out how the left side comes off. The pedal arm looks...


Bottom brackets are sealed, removing the seal will have potential for damage. If it's making noise, replace it or better yet upgrade as a crankset. You'll have new crankarms, bottom bracket, chainrings with it. Unless you have the correct bicycle tools (not general automotive tools) you won't be able to pull your crank and even reach the seal for the bottom bracket. Click here for tools you need to do the job.

Jul 03, 2010 | Ross Rock Machine Aluminum Mountain Bike

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