. MAINTENANCE SERVICE PROCEDURE MAINTENANCE SERVICE PROCEDURE the cleaner body to lock in position. 11. Push the head of dust indicator (1) to cancel the clogging display. 4 - 29 9. Replace O-rin g (9) wit h a new part. Next , set so th at vacu ator val ve (8 of dust cup bottom, a nd in sert it in to the air cleaner body. (4) is at 10. Clip hook s (5) of dust cup (4) t o the protruding parts of the air