Question about Stairmaster 4400 PT Stair Stepper

1 Answer

Stairmaster 4400pt loses all resistance after 15-20 minutes of us

Works fine for 15-20 minutes then loses all resistance in steps.

try it then next day and it does the same thing. changed the alternator brushes, resistor, and diode but still have same problem, after 15-20 minutes of use.

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  • Stairmaster Master
  • 914 Answers

Replacement Parts for Fitness Exercise Equipment at SPORTSMITH

This sounds like an issue with the console. It is almost like a software glitch in the programming. Before focusing on the console as the culprit, you can check the wiring leading up to the console for good continuity just to make sure the wiring isn't the issue. I will attach a link to a video on using a multimeter to assist in checking the wiring.

Video about Multimeter Testing

Posted on Jan 29, 2016

6 Suggested Answers

  • 1 Answer

SOURCE: Stairmaster 4400cl has two problems

you need a plug to charge it. it does have a battery

Posted on Jan 27, 2009

  • 49 Answers

SOURCE: STAIRMASTER 4600CL RIGHT PEDAL LOSES RESISTANCE AND SLIPS

http://support.nautilus.com/support/stairmaster.jsp?lid=StairMaster you can download and view all manuals here. If by drive sprocket you mean the hub that both step chains go over.....replace the entire hub. faster easier and less hassle. cost difference is about 40 dollars.

Posted on Sep 01, 2009

maxtreadmill
  • 832 Answers

SOURCE: stairmaster 4000 crazy console

Check all connections from power source in inside the cover where alternator is to upper display then if the problem still continues I suspect your upper console is going south. Call National Gym Supply @ 1-800-496-7278 they can either repair it or may have a exchange board for you.

Posted on Mar 13, 2010

maxtreadmill
  • 832 Answers

SOURCE: I just changed the alternator and diode in my

If the upper display is not give any commands for weight ,desired program and time, if these are not inputed then the resistance is high

Posted on May 15, 2010

maxtreadmill
  • 832 Answers

SOURCE: stairmaster freeclimber 4400pt how to fix slipping

This could be the hub assembly slipping I would replace this assembly and the pedal chains call National Gym Supply @ 800-496-7278 and get pricing for the hub assembly and step chain ( L & R )

Posted on Jun 01, 2010

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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1 Answer

I have a 440pt and the left pedal is skipping down to the floor about every 5 seconds. If the issue is the hub assemble, do I have to change out everything or can I just replace the bearing, etc...?


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
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Need owners manual for 4400pt


Stairmaster Stepper 4400PT Parts Chain Pedal Arm Fastener SPORTSMITH net

Click on the manuals tab in the middle of the screen. You will have access to the owners and service manuals.

Jan 21, 2013 | Stairmaster 4400PT FreeClimber

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Left pedal has no resistance right pedal is fine


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

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Stairmaster 4400pt seems to have a slipping chain.


Replacement Parts for Fitness Exercise Equipment at SPORTSMITH

You can take the covers off and see if it is indeed the chain that is slipping, but in most cases, the drive sprocket is actually what is failing. The following link will take you the item that should rectify your issue.

Drive Hub for Stairmaster Steppers 4000PT 4400CL 4600CL 4400PT 4600PT...

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Stairmaster freeclimber 4400pt how to fix slipping chain. When using the machine the chain slips intermittently on both sides. Problem was infrequent in the beginning but getting worse all the time with...


This could be the hub assembly slipping I would replace this assembly and the pedal chains call National Gym Supply @ 800-496-7278 and get pricing for the hub assembly and step chain ( L & R )

May 25, 2010 | Stairmaster Exercise & Fitness

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