I, like many, am having a problem with an Atco Balmoral 17SE in that the rear roller keeps locking up. Thanks for the Atco/Qualcast Service bulletins that have been posted on to dropbox, they have helped a bit. I've replaced the ring gear & pinion as well as the internal roller toothed gears. The rollers rotate in opposite directions OK, and run together when the pinion drive is removed. When in situ, the roller moves a bit and then locks up (backwards & forwards). Spinning the rollers when the pinion gear is removed seems to show that the ring gear is not running completely centrally, so the locking up is where the pinion gear is very tight to the ring gear. Can't see there is any opportunity for any adjustment (other than securing it at the 3 different positions where it is screwed to the shaft). Have to perhaps assume that the shaft has been bent, but it doesn't appear to be, and there is no discernable wear to the shaft. Am considering replacing the large white toothed gears/plastic bearings in each half of the rollers, although there doesn't seem much wear/movement. With the pinion gear in situ, there is a lot of end float of the pinion itself, no side movement (wear), just end float (must be over 1/4 inch) is this usual?
I am not sure of the production date of my machine as a previous owner has removed the silver label. I believe though that it is probably a 2000 onwards model, perhaps F016L80599 as it doesn't have the gear support bracket (F016102378), rather it has this as a welded plate onto the machine body
Would also appreciate advice as to which way around the end roller bearings should be fitted to the machine sides. Some pictures seem to have the flat surface facing the machine side frames and others, including the blown up parts diagrams seem to show them the other way around. Does it matter?