Graco Contractor King 279005 Instructions Manual page 32

Air Motor Repair
6. Loosen two screws (27), remove top two (27)
screws, loosen lower two (27) screws to valve
assembly (30) out of the way. Retain top gasket
(24).
32
7. Remove six bolts (31) on top of motor cover (22),
then remove cover.
8. Slide piston rod (7) up to push piston (10) out the
top of the motor.
9. Remove piston seal (13).
3A9121A