TM 9-2320-260-34-1
3-51. CYLINDER HEAD REPAIR (Contd)
24.
Pressure test inlet fuel passage (9) and outlet fuel passage (8) for leakage or cracks in steps 25
through 32.
25.
Install two new O-rings (12) and plate (11) on cylinder head (3) with two new screw-assembled lock-
washers (10).
Install pipe adapter, pipe extension, and air pressure gage on outlet fuel passage (8).
26.
Install air hose adapter, air pressure control valve, and air hose on inlet fuel passage (9).
27.
28.
Open air pressure control valve until air pressure gage reads between 80-100 psi (552-690 kPa),
then close.
29.
Replace cylinder head (3) if air pressure on pressure gage drops in less than fifteen seconds.
Remove air pressure gage, pipe extension, and pipe adapter from cylinder head (3).
30.
Remove air hose, air pressure control valve, and air hose adapter from cylinder head (3).
31.
Install all pipe plugs in fuel passages of cylinder head (3).
32.
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