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Doosan DE12T - Outside Diameter; Push Rod Run-Out; Visual Check of Tappet

Doosan DE12T
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Visual check of tappet
Visually check the face of the tappets in
contact with the cam for pitting, scores or
cracks, and replace if severely damaged.
If the amount of cracks or pitting is small,
correct with an oil stone or grinding
paper.
Outside diameter
With an outside micrometer, measure
the tappet outside diameter If the mea-
sured value is beyond the limit, replace
tappets.
Push rod run-out
Use a feeler gauge to measure the push
rod run-out.
Roll the push rod along a smooth flat sur-
face as shown in the figure.
- 80 -
❘❏❆✔✠✟ ❙❏❆✝✡✔ ❚❏❆✝✠✏
❏❆✎✝✝✠✏
EA0M4070
EDM2061I
EA0M4073
Feeler gauge
Tappet Dia 19.944 ~ 19.965 mm
Limit 0.3 mm or less
Standard Limit
Tappet
0.035~0.077mm 0.1mm
Clearance
Unevenness Crack Normal
Abnormal

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