Doosan D35S-5 Service Manual page 80

4. After installing the piston ring to the cylinder bore,
push the piston ring to the vertical direction with
the piston.
Piston ring end gap
Ring No.1 : 0.25 ~ 0.40 mm
Ring No.2 : 0.50 ~ 0.65 mm
Oil ring : 0.20 ~ 0.40 mm
D439E Service Manual
Crankshaft
1. Measure the endplay of crankshaft.
Crankshaft endplay
Reference : 0.10 ~ 0.26 mm
Limit : 0.4 mm
a. If the endplay exceeds the limit, replace the
thrust plate with the oversize.
b. Over sizes of the thrust plate are +0.15, +0.30,
and +0.45.
2. Measure the oil gap of crankshaft main bearing.
a. Remove the man bearing cap.
b. Measure the oil gap of man bearing.
1) Remove the oil or other foreign materials
from main journal and main bearing surface.
2) Place the plastic gauge along with the shaft
direction of the journal.
78 2. Engine Mechanical System (D439E)