Yanmar 2TNV70 - Idler Gear Shaft and Bushing; Timing Gear Backlash; Crankshaft and Pistons Specifications; Crankshaft

ENGINE
TNV IDI Service Manual
6-7
Crankshaft and Pistons Specifications
Idler Gear Shaft and Bushing
Timing Gear Backlash
CRANKSHAFT AND PISTONS SPECIFICATIONS
Crankshaft
Note: Check appropriate parts catalog for undersized replacement main bearing inserts.
Inspection Item Standard Limit
Reference
Page
Shaft Outside Diameter
1.4547 - 1.4557 in.
(36.950 - 36.975 mm)
1.4528 in.
(36.900 mm)
See
Inspection of
Idler Gear
and Shaft on
page 6-51
Bushing Inside Diameter
1.4567 - 1.4577 in.
(37.000 - 37.025 mm)
1.4596 in.
(37.075 mm)
Oil Clearance
0.0010 - 0.0030 in.
(0.025 - 0.075 mm)
0.0069 in.
(0.175 mm)
Inspection Item Standard Limit
Reference
Page
Crank Gear, Cam Gear, Idler Gear, Fuel Injection Pump Gear
and PTO Gear
0.0024 - 0.0047 in.
(0.06 - 0.12 mm)
0.0055 in.
(0.14 mm)
See
Checking
Timing Gear
Backlash on
page 6-36
Inspection Item Standard Limit
Reference
Page
Bend (1/2 the dial gauge reading) -
0.0008 in.
(0.02 mm)
See
Inspection of
Crankshaft
on page 6-49
Roundness
0.0004 in.(0.01 mm)
or less
0.0008 in.
(0.02 mm)
Connecting Rod
Journals
Journal Outside
Diameter
2TNV70
3TNV70
1.4942 - 1.4946 in.
(37.952 - 37.962 mm)
1.4725 in.
(37.402 mm)
3TNV76
1.6517 - 1.6520 in.
(41.952 - 41.962 mm)
1.6497 in.
(41.902 mm)
Bearing Inside
Diameter
2TNV70
3TNV70
1.4954 - 1.4965 in.
(37.982 - 38.010 mm)
-
3TNV76
1.6528 - 1.6536 in.
(41.982 - 42.002 mm)
-
Bearing Insert
Thickness
2TNV70
3TNV70
3TNV76
0.0592 - 0.0594 in.
(1.503 - 1.509 mm)
-
Oil Clearance
2TNV70
3TNV70
0.0008 - 0.0023 in.
(0.020 - 0.058 mm)
0.0043 in.
(0.110 mm)
3TNV76
0.0008 - 0.0020 in.
(0.020 - 0.050 mm)
0.0043 in.
(0.110 mm)
TNV_IDI_ServiceManual_A4.book 7 ページ ２０１２年２月２４日 金曜日 午前１０時２４分