Doosan DE12T - Page 61

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Condition Cause Remedies
7) Oil Consumption
Excessive
(1) Oil level elevated
¥
Clearance between cylinder iner & Replace
piston
¥
Wear of piston ring, ring groove Replace piston,
piston ring
¥
Piston ringÕs damage, stick, wear Replace piston ring
¥
Piston ring openingÕs disposition Correct position
improper
¥
Piston skirt part damaged or Replace piston
abnormal wear
¥
Oil ringÕs oil return hole clogged Replace piston ring
¥
Oil ringÕs contact poor Replace piston ring
(2) Oil level lowered
¥
Looseness of valve stem & guide Replace in set
¥
Wear of valve stem seal Replace seal
¥
Cylinder head gasketÕs leak Replace gasket
(3) Oil leak
¥
Looseness of connection parts Replace gasket,
repair
¥
Various partsÕ packing poor Replace packing
¥
Oil seal poor Replace oil seal