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09-03-2012, 02:34 PM #1
Tiny problem with Alpha Shuttle Express (tensioner slips on crank when tensioning)
Basically I wind the crank machine up with the string wrapped around it and when im winding it it stutters on the machine, and sometimes the crank falls back towards the racket thus untensioning it. Does anyone have any solutions to the problem, or know what the problem is? Thanks in advance BC
09-04-2012, 06:16 PM #2
Just to clarify, do you mean one of the following:
1) When you pull the lever/crank back before the set tension has tripped the "brake", the clamping mechanism rolls back (even if you hold the crank at a set angle).
2) The set tension has tripped the "brake", the crank stays at the same angle without you holding it but the whole clamping mechanism slides back as if the braking does is not clamping hard enough.
If it is #1, there is a chance the set screw (also called grub bolt) that tightens the gear onto the square axle that holds the cranks has loosened.
If it is #2, unless the friction pads have significantly worn or is out of adjustment, there's a chance the friction disc is has loosened off to one side disengaging it from the part that is part of the axle. The side to side loosening can be pushed back in place and prevented from moving out but the same gear and grub bolt mentioned for #1.
This might be a bit difficult to understand. I can try to take some photos if these are the scenarios you are experiencing.
09-08-2012, 11:29 AM #3
09-09-2012, 06:08 AM #4
09-09-2012, 07:05 PM #5
Be careful of the lateral adjustment/movement (indicated by the yellow arrows) available for the gear. Too much movement one side or another relative to the shaft can loosen the friction disc or cause binding.
09-10-2012, 08:42 AM #6