From inside (document excerpt):
PARTS LIST NO. DATE 545192165 NEW r PARTS LIST Note: Illustration may differ from actual model due to design changes CHAIN SAW MODEL(s) Mac 4- 10XT PAGE NO. 10/28/08 1 28 42 41 39 40 WARNING All repairs, adjustments and maintenance not described in the Operator’s Manual must be 27 26 38 37 36 performed by qualified service personnel.