B3.9 and B5.9 Series Engines
Section 12 - Compressed Air System - Group 12
Air Compressor Carbon Buildup
Initial Check (012-003-001)
Shut off the engine.
Open the draincock on the wet tank to release compressed
air from the system.
When using a steam cleaner, wear safety glasses or a
face shield, as well as protective clothing. Hot steam
can cause serious personal injury.
Compressed air used for cleaning purposes should not
exceed 207 kPa [30 psi]. Wear appropriate eye and face
protection when using compressed air. Flying debris
and dirt can cause bodily injury.
Use compressed air to dry.
Remove the air inlet and outlet connections from the air
Measure the total carbon deposit thickness inside the air
discharge line as shown.
NOTE: The carbon deposit thickness must not exceed 1.6
mm [0.0630 in].