80 SEBU7899-05 Maintenance Section Engine Air Precleaner - Check/Clean i02927289 Engine Air Precleaner - Check/Clean SMCS Code: 1055-070; 1055-535 g01456410 Illustration 43 View of the left side of a C18 Industrial Engine that is equipped with two engine crankcase breathers (1) Hose Clamp (2) Hose (3) Valve Cover g01453058 Illustration 42 Typical engine air precleaner (1) Wing nut (2) Cover (3) Body Remove wing nut (1) and cover (2). Check for an accumulation of dirt and debris in body (3). Clean the body, if necessary. After cleaning the precleaner, install cover (2) and wing nut (1). Note: When the engine is operated in dusty applications, more frequent cleaning is required.
g01786116 Illustration 44 i03435665 Engine Crankcase Breather - Clean View of the left side of a C18 Industrial Engine that is equipped with one engine crankcase breather (1) Hose Clamp (2) Hose (3) Valve Cover SMCS Code: 1317-070 1. Loosen the hose clamp and remove the hose from the valve cover. NOTICE Perform this maintenance with the engine stopped. 2. Remove the valve cover. Refer to Disassembly and Assembly, “Valve Mechanism Cover - Remove and Install”. If the crankcase breather is not maintained on a regular basis, the crankcase breather will become plugged. A plugged crankcase breather will cause excessive crankcase pressure that may cause crankshaft seal leakage.
Your engine may have one or two crankcase breathers.