TM 5-2420-230-24-2
A/C Cylinder Head (SS 191 Model) (012-101)
B3.9 and B5.9 Series Engines
Page 12-28
Section 12 - Compressed Air System - Group 12
Measure the top of the cage to the valve stop.
Stop Depth
mm
in
3.63
MIN
0.143
3.78
MAX
0.149
Exhaust Valve Stop
Inspect the exhaust valve stop. Replace the cylinder head
assembly if the stop is loose or damaged.
Measure the distance from the valve end of the stop to the
face of the cylinder head.
Stop Height
mm
in
4.42
MIN
0.174
4.70
MAX
0.185
Replace the cylinder head if not within limits.
Unloader Pin
Inspect for scoring or pitting.
L-1232