Doosan P158LE -III, Operation & Maintenance Manual, Page: 53 / 165

Technical Information - 50 -
Condition Causes Remedies
7) Oil Consumption Excessive
(1) Oil level elevated z Clearance between cylinder liner & piston Replace
z
Wear of piston ring, ring groove Replace piston, piston ring
z Piston ring’s damage, stick, wear Replace piston ring
z
Piston ring opening’s disposition improper Correct position
z Piston skirt part damaged or abnormal wear Replace piston
z
Oil ring’s oil return hole clogged Replace piston ring
z Oil ring’s contact poor Replace piston ring
(2) Oil level lowered
z
Looseness of valve stem & guide Replace in set
z Wear of valve stem seal Replace seal
z
Cylinder head gasket’s leak Replace gasket
(3) Oil leak z Looseness of connection parts Replace gasket, repair
z
Various part’s packing poor Replace packing
z Oil seal poor Replace oil seal