Kohler Command Pro CV980 - Manual (Page 97)

Section 9
Inspection and Reconditioning
9
9.5
EXHAUST VALVE INTAKE VALVE
A B
C
D
D
F
E
G
H
F
E
G
H
INT
EXH
Figure 9-6. Valve Details.
Š›ȱœŠ›’—ȱ˜›ȱ•˜œœȱ˜ȱ™˜ Ž›ȱŠŒŒ˜–™Š—’Žȱ‹¢ȱ‘’‘ȱ
fuel consumption may be symptoms of faulty valves.
•‘˜ž‘ȱ‘ŽœŽȱœ¢–™˜–œȱŒ˜ž•ȱŠ•œ˜ȱ‹ŽȱŠĴ›’‹žŽȱ˜ȱ
˜›—ȱ›’—œǰȱ›Ž–˜ŸŽȱŠ—ȱŒ‘ŽŒ”ȱ‘ŽȱŸŠ•ŸŽœȱꛜǯȱЎ›ȱ
removal, clean the valve heads, faces, and stems with
a power wire brush. Then, carefully inspect each valve for defects such as a
warped head, excessive corrosion, or a worn stem end.
Replace valves found to be in bad condition. A normal
valve and valves in bad condition are shown in the
accompanying illustrations.
Dimension Intake Exhaust
A Seat Angle Şşǚ Şşǚ
B Seat Taper 30° 30°
C Guide Depth Şǯśȱ––ȱǻŖǯřřŚȱ’—ǯǼ Şǯśȱ––ȱǻŖǯřřŚȱ’—ǯǼ
D Guide I.D. ŝǯŖřŞȦŝǯŖśŞȱ––ȱǻŖǯŘŝŝŗȦŖǯŘŝŝşȱ’—ǯǼ ŝǯŖřŞȦŝǯŖśŞȱ––ȱǻŖǯŘŝŝŗȦŖǯŘŝŝşȱ’—ǯǼ
E Š•ŸŽȱŽŠȱ’Š–ŽŽ› řŞǯŜŘśȦřŞǯŜŞśȱ––ȱǻŗǯśŘŖŜȦŗǯśŘřŖȱ’—ǯǼ řŗǯŜŘśȦřŗǯŞŘśȱ––ȱǻŗǯŘŚśŖȦŗǯŘśŚşȱ’—ǯǼ
F Valve Face Angle 45° 45°
G Valve Margin (Min.) 1.0 mm (0.0393 in.) 1.0 mm (0.0393 in.)
H Valve Stem Diameter ŜǯşŞŘȦŝǯŖŖŖȱ––ȱǻŖǯŘŝŚşȦŖǯŘŝśŜȱ’—ǯǼ ŜǯşŝŖȦŜǯşŞŞȱ––ȱǻŖǯŘŝŚŚȦŖǯŘŝśŗȱ’—ǯǼ