Yanmar 3TNV88F - Piston Ring; Connecting Rod

ENGINE
6-8
3TNV88F Service Manual
Crankshaft and Piston Specifications
Piston Ring
Connecting Rod
■ Connecting rod small end
■ Connecting rod big end
Note: See Special Torque Chart on page 6-10 for other specifications.
Inspection item Standard Limit Reference page
Top ring
Ring groove
width
0.0811 - 0.0817 in.
(2.060 - 2.075 mm)
–
See Inspection of pistons,
piston rings and wrist pin
on page 6-41.
Ring width
0.0776 - 0.0783 in.
(1.970 - 1.990 mm)
0.0768 in.
(1.950 mm)
Side clearance
0.0028 - 0.0041 in.
(0.070 - 0.105 mm)
–
End gap
0.0079 - 0.157 in.
(0.200 -0.400 mm)
0.0193 in.
(0.490 mm)
Second ring
Ring groove
Width
0.0797 - 0.0803 in.
(2.025 - 2.040 mm)
0.0843 in.
(2.140 mm)
Ring width
0.0776 - 0.0783 in.
(1.970 - 1.990 mm)
0.0768 in.
(1.950 mm)
Side clearance
0.0014 - 0.0028 in.
(0.035 - 0.070 mm)
0.0075 in.
(0.190 mm)
End gap
0.0079 - 0.0157 in.
(0.200 - 0.400 mm)
0.0193 in.
(0.490 mm)
Oil ring
Ring groove
width
0.1581 - 0.1587 in.
(4.015 - 4.030 mm)
0.1626 in.
(4.130 mm)
Ring width
0.1563 - 0.1571 in.
(3.970 - 3.990 mm)
0.1555 in.
(3.950 mm)
Side clearance
0.0010 - 0.0024 in.
(0.025 - 0.060 mm)
0.0071 in.
(0.180 mm)
End gap
0.0079 - 0.0157 in.
(0.200 - 0.400 mm)
0.0193 in.
(0.490 mm)
Inspection item Standard Limit Reference page
Wrist pin bushing inside diameter
1.0234 - 1.0251 in.
(26.025 - 26.038 mm)
1.0263 in.
(26.068 mm)
See Inspection of
connecting rod on
page 6-43.
Wrist pin outside diameter
1.0234 - 1.0236 in.
(25.995 - 26.000 mm)
1.0223 in.
(25.967 mm)
Oil clearance
0.0010 - 0.0017 in.
(0.025 - 0.043 mm)
0.0040 in.
(0.101 mm)
Inspection item Standard Limit Reference page
Side clearance
0.0079 - 0.0157 in.
(0.20 - 0.40 mm)
–
See Inspection of
connecting rod on
page 6-43.
3TNV88F_SVM_A4.book 8 ページ ２０１２年７月２６日 木曜日 午後６時４分