CORRECTIVE ACTION Continued
reads lower, troubleshoot engine oil pressure gage circuit (see WP 0050 00). If pressure gage reads less
that 40 psi (276 kPa) at 2400 rpm, notify Direct Support Maintenance.
Remove left- and center-front air inlet grilles (see WP 0342 00). Remove main engine oil pressure
switch (see WP 0171 00) and install pressure gage (item 156, WP 0488 00). If pressure gage reads
4070 psi (276483 kPa) at 2400 rpm and engine oil pressure gage reads higher, troubleshoot engine
oil pressure gage circuit (see WP 0050 00). If pressure gage reads higher that 70 psi (483 kPa) at 2400
rpm, notify Direct Support Maintenance.
While an assistant operates vehicle, look at engine exhaust. If there is excessive smoke from one or
both banks of cylinders or exhaust is oily, remove crankcase breather tube (see WP 0108 00). Check to
see if engine breather tube is clogged. Service or replace clogged breather tube. If there is no evidence
of excessive exhaust smoke and exhaust is not oily, remove left- and center-front air inlet grilles (see
WP 0342 00) and open side air inlet grille doors. Check engine externally for evidence of oil leaks.
Tighten all loose fittings and connections.
Check engine cooling grille openings for restrictions. Remove all material that blocks air flow to
Remove left and right deck air inlet doors (see WP 0345 00). Check engine oil cooler screens for
restrictions (see WP 0148 00). Remove all restrictions from oil cooler screens.
Visually inspect engine oil cooler air passages. If engine oil cooler air passages are restricted, clean
passages using oil cooler cleaning tool (item 138, WP 0488 00).
10. Remove left- and center-front air inlet grilles (see WP 0342 00) and inspect oil cooler lines for kinks
and/or twists. Repair or replace any damaged oil cooler lines (see WP 0149 00).
Care should be taken when feeling tubes. They can be hot enough to burn.
11. With engine operating at approximately 200 F (93 C), cautiously feel oil cooler lines and oil cooler. If
oil cooler lines are hot and oil cooler is only warm, notify Direct Support Maintenance.
END OF WORK PACKAGE