Tappet And Push Rod; Tappet Clearance; Visual Inspection Of Tappet; Warpage Of Push Rod - Doosan DP158L Series Operation & Maintenance Manual

10. Cylinder block/head

Tappet and push rod

Tappet Clearance

Measure the outer diameter of a tappet and the inner diam-
eter of the tappet bore. If the reading exceeds the tolerance
limit, replace the tappet.
Standard
0.035mm ~ 0.077mm

Visual inspection of tappet

Inspection if the tappet surface which contacts the camshaft
has damage like crack or scratch. If the damage is small,
correct it with oil stone or fine grinding paper, if excessive,
replace it.
normal
(irregularity)
abnormal

Warpage of Push Rod

Put the push rod on a surface plate, and measure the
warpage with a feeler gauge shile spinning it. If the reading
exceeds the tolerance limit, replace it.
Limit
Limit
0.25mm
abnormal abnormal
(crack)
abnormal
DV2213128A_E
Below 0.3mm
160
Feeler gauge
DV2213129A_E