JLG X23J - X700AJ Service Manual - Manual (Page 162)

SECTION 3 - CHASSIS & TURNTABLE
3121448 – JLG Lift – 3-135
COMBUSTION CHAMBER CLEANING
Remove the cylinder head (page 13-3).
Clean any carbon deposits from the combustion chamber
(1).
(2)
(2)
To increase valve clearance: screw out.
To decrease valve clearance: screw in.
(1)
VALVE STEM
(1)