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Service Instructions B500
Settings/substitution/replacement
- Remove the knob protection cap
- Remove the back adjusting knob from the
seat back
- Use a screwdriver to press out three small
plastic nipples from the rear
- Remove the rest of the lining
- Use a size 4 drill to enlarge the two boreholes
in the sheet metal shield (for the belt fasten-
ing screws, see arrows).