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Group 25 Inlet and Exhaust System
Inspection
Cleaning air cooler
1. Remove dirt built up from the air cooler by direct-
ing high pressure air of {max press. 0.29 to 0.49
2
MPa (3 to 5kgf/cm
) [43 to 71 psi]} in the opposite
direction of the air flow. Inspect the cooler for cor-
rosion and cracks.
2. Wash the fresh water or salt water pipes in water
and caustic soda lime, then remove scale depos-
its by inserting a 3 mm [ 1/8 in.] bar into each
pipe.
Inspecting air cooler for air tightness
Immerse the air cooler in water, then apply high pres-
sure air {max press. 0.39 MPa (4 kgf/cm
the coolant side to inspect for air leaks.
NOTE! Keep record of the water/air
temperatures(using infrared temp. gun) to determine
when the cooler needs cleaning.
2
) [57 psi]} to
175
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