FIGURE 4-15. Grinding Valve Seats.

TM 55-1905-223-24-4

Grinding Seats. Previously re-ground seats can be replaced with service seats. The marked illustration

indicates a previously ground valve seat.

(1) Install the valves in their designated location and measure valve depth. The depth is the distance from

the valve face to the head deck as shown in FIGURE 4-16.

(2) Record the depth of each valve as (A). Table 4-3 gives minimum (MIN) and maximum (MAX) depth.

Table 4-3. Valve Depth

0.039

MIN

(0.99)

0.060

MAX

(1.52)

FIGURE 4-16. Checking Valve Depth (A).

4-17