TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
A/C Cylinder Head (SS 191 Model) (012-101)
Section 12 - Compressed Air System - Group 12
Page 12-27
Measure the valve guide diameter.
Valve Guide Diameter
mm
in
25.53
MIN
1.005
25.65
MAX
1.010
Replace the exhaust valve seat if not within limits.
Measure the distance from the top of the valve seat to the
valve seating surface.
Set Height
mm
in
4.01
MIN
0.158
4.11
MAX
0.162
Replace the exhaust valve seat if not within limits.
Inlet Valve Cage
Inspect the inlet valve cage for damage and wear.
Measure the valve guide diameter.
Valve Guide Diameter
mm
in
25.53
MIN
1.005
25.65
MAX
1.010
Replace the inlet valve cage if not within limits.
L-1231