it may be a cheaper idea to look for another carriage. In the meantime, maybe the button is just a little stiff & needs a bit of oil around it.
Jo, November 2008
Hello Mary,
If you are in the UK it may be worth your while sending the carriage and sinker direct to Brother Sewing Machines, Shepley Street, Audenshaw, Manchester.
drivewithken@blueyonder.co.uk, October 2008
Not quite sure what to suggest, i took my Brother K H 836 to www.knittingmachinerepairs.co.uk and they fixed mine, perhaps they can help you too?