Squeaking Panasonic motor

[mike killay]

One thing that I am not clear about is the frequency of this squeak.
Does it occur regulaly every 2 turns of the pedals and when the right hand pedal is in the same position?
Does its frequency in relation to the turns of the pedal crank change when you change gear?
Because it takes 2-3 miles before it becomes apparent, it suggests that something is expanding through heat.
Does the motor get hot?
Are you absolutelty sure where the squeak comes from? I am thinking of things like ensuring the wheel nuts are tight etc.
Have you been able to check the tightness of the motor bolts? Remember that if the motor heats up, bolts that are tight when cold can become slightly looser.

 

[shemozzle999]

but have tried running the motor without the chain?

 

[vaasa]

Thank you for all your suggestions. I'll check, clean and oil the transmission of my bike this week end to see if that helps. I'll let you know if anything changes. I think I can't run the motor without the chain though, because I do not have a throttle (I have a C pedelec, the motor of which only runs when the pedals are pushed with some force) Thus, I do not see how I can activate the motor without the chain.

To respond to some of your questions: It happens every 3-4 chain-wheel turn and the pedals do not seem to be in the same position each time; I'm not sure where it comes from, although the regularity of the noise (like clockwork - every 3-4 turns) seems not to support the loose bolts of the motor as a likely cause. I share the opinions of flecc, d8veh etc; that the transmission seems to be the most likely cause because of the regularity of the noise. However, the oiling and the change of chain did not seem to make the noise emitted by the nemesis' pro connect to go away. I'll see how it goes for me...

 

[tillson]

The best chance that you will have of locating this noise is by investigating the frequency and from this eliminating components. Can you answer the following questions?

1) If you ride in a fixed gear, any will do, does the frequency of the noise increase and decrease with road speed (ie varying the road speed through pedal cadence)?

2) If you ride at a fixed road speed, does the frequency of the noise increase and decrease with changing gear ratio (ie varying cadence via the gears)?

3) if you ride at a fixed pedal cadence (The best you can), does the noise frequency increase and decrease with changing gear ratio (ie varying road speed via the gears)

The answer to these questions should reveal if the noise is coming from the motor or transmission. Once you know the answer to this question, further investigation can be carried out to narrow down the likely source.

 

[lemmy]

I had a similar problem for a short while - I found that somehow one of the rear axle nuts had come loose, giving the rear wheel a small amount of movement.

I say came loose - I don't want to admit that I may have neglected to tighten it properly following a thorough clean-up.

 

[mike killay]

I had a similar problem for a short while - I found that somehow one of the rear axle nuts had come loose, giving the rear wheel a small amount of movement.

I say came loose - I don't want to admit that I may have neglected to tighten it properly following a thorough clean-up.

This is a possibility that occured to me. The squeak does not seem to be related to any part of any turning cycle either in the motor, the motor transmission or the chain transmission. If it only comes every 3 to 4 pedal turns, then in a 60 inch gear we are talking about every 20 feet along the road or so.
Could the squeak be the rear tyre occaisonally touching the frame. Because it only happens under electric load, it may be that the extra force of pedal and motor are needed to move the wheel. I would also check for a cracked or flexing frame.