Piston - Yanmar 4TNV98 Service Manual

Piston

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