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 TM 55-1905-223-24-3
(a) Install the plates on the cylinder head. Engage the locating pins for the plates with the holes in the cylinder
head.
(b) Install the clamping assembly over the plates on the cylinder head. Engage the locating pins for the clamping
assembly with the holes in the plate.
(c) Tighten the screw for the clamping assembly. Make sure the drain valve in the adapter plate is in the closed
position.
(d) Use the pins that are supplied with the quadrant to fasten the clamping assembly to the quadrant. Fasten the
longer bracket of the quadrant to the bottom of the clamping assembly.
(4)
Connect a regulated air supply hose to the test fixture plate.
(5)
Adjust the air pressure to 30 to 40 psi (207 to 276 kPa).
(6)
Use a hoist to place the cylinder head in a tank of warm water heated to 140 (60 ).
F
C
(7)
Completely submerge the cylinder head in the water.
(8)
Visually inspect for air bubbles rising from the water.
(9)
If air bubbles are observed, replace the cylinder head.
(10) Lift the cylinder head from the tank.
(11) Disconnect air supply hose from test fixture plate.
c. Water pressure test the cylinder head.
(1) Install a pressure regulator and gauge into a hose that connects to the water and air supply.
NOTE
The water and air supply must have shut-off valves.
(2) Set the pressure at 35 to 85 psi (241 to 586 kPa).
(3) Heat water temperature to 180to 200 (82to 93 ).
F
C
(4) Connect the hose to the fitting in the plate. Open the drain valve to remove the air from the cylinder head.
(5) Open the valve for the water to fill the cylinder head with water.
(6) Close the valves for the water and drain when all the air has been removed from the head.
(7) Open the valve for the air pressure.
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