Just received an email enquiry about a Rowperfect with a wobbly flywheel.
Hi, we have a rowperfect in our boathouse. The problem is on the recovery of the stroke when the chain is recoiling, the flywheel shakes violently. On the drive phase of the stroke the everything is ok. Its just on the recoil when the chain starts to rewind in. I have checked the chain and initial cogs, they are ok. Could you help me in being able to identify the fault?
This made us suspect a bent main shaft. The main symptom is
- flywheel wobble on the recoil
Test for a Main shaft that may be bent
Pull the chain out and hold the flywheel section stationary. Put your hand over the flywheel cage and touch your fingers onto the wheel itself and with a light finger pressure hold it still as you slowly recoil the chain.
If you can see movement and feel the flywheel moving in and out of contact with your finger the main shaft is bent. There should be no side to side movement of the flywheel itself. If you can see movement and feel the flywheel moving in and out of contact with your finger the main shaft is bent.
Take a look at this “main shaft replacement instructions” The first bit is how to test to see if your main shaft is bent… I fear that’s what has happened to your RP.
This usually happens when an athlete hit the front leg hard with the fly wheel section during rowing.
To prevent this happening, wind a bungee around the bar 50 cms from the back leg then the seat can’t go further forward than this point and unless the athlete has very long legs, will prevent the fly wheel section reaching the front leg.
A new main shaft can be purchased and fitted. If you are confident following instructions you can fit this yourself. If not, Rowperfect UK can do it for you – maybe within a maintenance service. Read the service and maintenance sheet below for recommended daily, monthly and annual actions.
We find baby wipes are very good for cleaning the main bar after each workout!