Kohler Command PRO ECV630 Service Manual page 96

Disassembly/Inspection and Service
Inspection and Service
Valve Details
EXHAUST VALVE
E
G
H
Dimension
A Seat Angle
B Insert O.D.
C Guide Depth
D Guide I.D.
E Valve Head Diameter
F Valve Face Angle
G Valve Margin (Min.)
H
Valve Stem Diameter
After cleaning, check flatness of cylinder head and
corresponding top surface of crankcase, using a surface
plate or piece of glass and feeler gauge as shown.
Maximum allowable out of flatness is 0.076 mm (0.003
in.).
Carefully inspect valve mechanism parts. Inspect valve
springs and related hardware for excessive wear or
distortion. Check valves and valve seat area or inserts
for evidence of deep pitting, cracks, or distortion. Check
clearance of valve stems in guides. See valve details
and specifications.
96
F
C
D
D
Intake
89°
36.987/37.013 mm (1.4562/1.4572 in.)
4 mm (0.1575 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
33.37/33.63 mm (1.3138/1.3240 in.)
45°
1.5 mm (0.0591 in.)
6.982/7.000 mm (0.2749/0.2756 in.)
KohlerEngines.com
B
A
EXHAUST
INSERT
INTAKE
INSERT
A
B
32.987/33.013 mm (1.2987/1.2997 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
29.37/29.63 mm (1.1563/1.1665 in.)
6.970/6.988 mm (0.2744/0.2751 in.)
Hard starting or loss of power accompanied by high
fuel consumption may be symptoms of faulty valves.
Although these symptoms could also be attributed to
worn rings, remove and check valves first. After removal,
clean 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.
INTAKE VALVE
F
E
G
H
Exhaust
89°
6.5 mm (0.2559 in.)
45°
1.5 mm (0.0591 in.)
24 690 02 Rev. D