Figure 5-14. Removal of valve seat.

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Figure 5-12. Rocker arms and push rods.

TM-55-1925-204-12 TUG Harbor Diesel 1200 H. P. Steel 100 Ft Design 3006 Flight One FSN 1925-375-3003 Manual

Figure 5-15. Sequence of tightening cylinder head nuts.

TM 55-1925-204-12

Figure 5-13. Exhaust valves on two value, four cylinder head.

(d) Remove valve from guide by pushing

(3)

Valve seat removal (as required).

stem through the guide, then pulling valve out of guide at the

(a) Wash the cylinder head with clean fuel

bottom of the cylinder head. Tag each valve for identification

oil and blow dry with compressed air.

of guide from which removed, to facilitate installation at

(b) Position the cylinder head on its side

reassembly.

Figure 5-14. Removal of valve seat.

(f) Tap the bar once or twice to move the

seat so that the bottom of the collet is flush with the bottom of

seat about 1/16 in. away from its seat in the cylinder head.

the seat.

(g) Turn T-handler to loosen collet cone,

(d) Hold the collet handle and turn the T-

then move the remover into the seat slightly so that the

handle to expand thecollet cone until the seat is held securely

narrow flange at the bottom of the collet is below the valve

by the remover.

seat.

(e) Insert the driver bar of the remover

(h) Tighten the T-handler of remover, then

through the valve guide.

continue to drive the seat out of the cylinder head.

(4) Exhaust valve guide removal.

5-17