Use the Ramstop to lock the ram in position
about 150mm forward. Remove the 4 bolts holding the Duoct blade/pusher
to the carriage and remove the blade/pusher. Unlock the Ramstop, if the
carriage returns then the arms are bent.
Check the amount of bend with a straight edge, if it is less than 5mm then you may be able to straighten them in a vice.