Yanmar 4TNV98, Руководство по обслуживанию

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4TNV98 & 4TNE98 Diesel Engine Section 3. Engine 71
Piston
Inspection Item Standard Limit
Reference
Page
Piston Outside Diameter
(Measure at 90° to the Piston Pin.) 3.8555 - 3.8567 in.
(97.930 - 97.960 mm)
3.8541 in.
(97.895 mm)
Piston Diameter Measure Location(Upward
From the Bottom of the Piston.) 0.8661 in.
(22 mm)
-
See
Inspection of
Pistons,
Piston Rings
and Wrist
Pin on page
122.
Hole Inside Diameter
1.1811 - 1.1815 in.
(30.000 - 30.009 mm)
1.1826 in.
(30.039 mm)
Pin Outside Diameter
1.1807 - 1.1811 in.
(29.989 - 30.000 mm)
1.1795 in.
(29.959 mm)
Piston Pin
Oil Clearance
0.0000 - 0.0008 in.
(0.000 - 0.020 mm)
0.0031 in.
(0.080 mm)
See
Inspection of
Pistons,
Piston Rings
and Wrist
Pin on page
122.
Piston Ring
Model Inspection Item Standard Limit
Reference
Page
Ring Groove Width
0.0803 - 0.0811 in.
(2.040 - 2.060 mm)
-
Ring Width
0.0764 - 0.0772 in.
(1.940 - 1.960 mm)
0.0756 in.
(1.920 mm)
Side Clearance
0.0031 - 0.0047 in.
(0.080 - 0.120 mm)
-
Top Ring
End Gap
0.0098 - 0.0177 in.
(0.250 - 0.450 mm)
0.0213 in.
(0.540 mm)
Ring Groove Width
0.0819 - 0.0825 in.
(2.080 - 2.095 mm)
0.0864 in.
(2.195 mm)
Ring Width
0.0776 - 0.0783 in.
(1.970 - 1.990 mm)
0.0768 in.
(1.950 mm)
Side Clearance
0.0035 - 0.0049 in.
(0.090 - 0.125 mm)
0.0096 in.
(0.245 mm)
Second Ring
End Gap
0.0177 - 0.0256 in.
(0.450 - 0.650 mm)
0.0287 in.
(0.730 mm)
Ring Groove Width
0.1187 - 0.1193 in.
(3.015 - 3.030 mm)
0.1232 in.
(3.130 mm)
Ring Width
0.1169 - 0.1177 in.
(2.970 - 2.990 mm)
0.1161 in.
(2.950 mm)
Side Clearance
0.0010 - 0.0024 in.
(0.025 - 0.060 mm)
0.0071 in.
(0.180 mm)
4TNV98
Oil Ring
End Gap
0.0098 - 0.0177 in.
(0.250 - 0.450 mm)
0.0217 in.
(0.550 mm)
See
Inspection of
Pistons,
Piston Rings
and Wrist
Pin on page
122.