Doosan DX60R Shop Manual page 293

Inspection of Push Rods
Push Rod Bend
1. Place the push rods on a flat inspection block or layout
bed.
2. Roll the push rods until a gap can be observed between a
portion of the push rod and the surface of the block or
layout bed.
3. Use a feeler gauge to measure the gap (Figure 134). See
"Push Rod" on page -96 for the service limit.
Inspection of Rocker Arm Assembly
Rocker Arm Shaft Hole Diameter
Use a telescoping gauge and micrometer to determine if the
inside diameter of all the rocker arm support brackets and the
rocker arms (Figure 135) are within the specified limits. See
"Rocker Arm and Shaft" on page -96 for the service limit.
Inspect the contact areas (1, Figure 135) for excessive wear or
damage.
Rocker Arm Shaft Outside Diameter
Use a micrometer to measure the rocker arm shaft diameter
(Figure 136). Measure at each rocker arm location in two
directions 90° apart (Figure 136). See "Rocker Arm and Shaft"
on page -96 for the service limit.
Engine
Figure 134
Figure 135
Figure 136
SP001693
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