Figure 4-12. Checking Fire Deck of Cylinder Head.

TM 55-1930-208-24

4-10. HEAD, CYLINDER - Continued.

c. Inspection - Continued.

(4) Refer to figure 4-12 and inspect cylinder head fire deck for flatness.

(a) Inspect for flatness. Use a heavy, accurate straight-edge and feeler gages.

(b) Check for transverse warpage at points A thru E. Maximum allowable warpage is .004 inch.

Figure 4-12. Checking Fire Deck of Cylinder Head.

(5) Inspect the cam follower bores for wear and scoring. Repair light scoring with crocus cloth (item 5, Appendix

C) wet with fuel oil (item 9, Appendix C).

(6) Check that water nozzles are securely mou ted. Inspect nozzles for damage. Replace if damaged.

d. Repair.

(1) Refer to figure 4-13 and reface warped head provided that removal of metal will not bring the indicated

dimensions less than 3.536 inch minimum.

4-22