THEORY OF OPERATION -- CONTINUED
CRANKCASE BREATHER AND FIRE EXTINGUISHER SYSTEMS
Crankcase Breather System A large diameter breather tube is run through the engine from the top of the damper
housing to the back of the engine (Figure 1--12). The engine breathes from the top of the damper housing. The
engine is shipped with a breather extension tube to facilitate connection to the RH bank turbo tail pipe. At the bot-
tom of the extension tube is a small trap where oil drains to the RH bank corner of the oil pan.
Fire Extinguisher System The engine is equipped with a fire extinguisher tube located in the V (Figure 1--12).
This tube is connected to the engine compartment fire extinguisher system. The tube has small holes drilled along
the entire length to direct the carbon dioxide (CO2) fire extinguisher fluid in predetermined directions around cylin-
ders, fuel metering pump, and inter--cylinder components in case of fire.
0.030 IN. RESTRICTOR PLATE
BETWEEN BREATHER TEE
AND ACCESSORY DRIVE
FROM CRANKCASE AND
ACCESSORY DRIVE HOUSING
TO LEFT EXHAUST PIPE
DAMPER AND OIL FILTER
FUEL METERING PUMP
FUEL CUT--OFF LEAD
FUEL METERING PUMP FUEL
Figure 1--12. Engine Crankcase Breather, Fire Extinguisher System and Fuel Return