TM 10-4130-237-14
5-16. EXPANSION VALVE REPLAY (CONT)
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b. Removal
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Insert the expansion valve bulb in a cup of ice.
NOTE
Engine will automatically stop when refrigerant pressure drops below 35 psi
(241 kPa).
Hold toggle switch S–3 in START position to prevent engine from stopping during test.
Again observe pressure gage on low side of charging manifold. Pressure should reduce to about 30 psi
(207 kPa). If pressure does not reduce to this level or falls below 25 psi (172 kPa), the expansion valve
is defective and should be replaced.
Stop engine and remove charging manifold and hoses (para 5-9).
Carefully slide clamps upon expansion valve bulb.
Tighten screws in expansion valve bulb clamps, ensuring good contact along the entire length of the
bulb.
Replace insulation surrounding expansion valve bulb.
Drain engine oil (para 3-l).
Cut away insulation from expansion valve bulb.
Loosen two clamps from bulb assembly and refrigerant line.
Carefully slide clamps down and free of bulb. Cut tie wraps as needed.
Set water chiller on its side.
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