Yanmar 3TNV82A-B Service Manual page 218

ENGINE
2. Measure the outside diameter of the tappet
stem (Figure 6-121, (1)). See Tappet on
page 6-23 for the service limit.
Figure 6-121
3. Measure the tappet bores in the cylinder block.
See Tappet on page 6-23 for the service limit.
Inspection of Crankshaft
1. Place the crankshaft end journals
(Figure 6-122, (4)) on V-blocks.
2. Place a dial indicator (Figure 6-122, (3)) on a
center main bearing surface.
(2)
(1)
(4)
Figure 6-122
3. Rotate the crankshaft and observe runout. See
Crankshaft on page 6-14 for specifications.
6-86
(1)
0001726A
(3)
(4)
0000232A
Crankshaft and Camshaft Components
4. Use the color check method or Magnaflux® to
inspect the crankshaft for cracks. Replace the
crankshaft if evidence of fractures are found.
5. Measure the outside diameter of each crankpin
(Figure 6-123, (2)) and main bearing journal
(Figure 6-123, (1)). See Crankshaft on
page 6-14 for specifications. Take
measurements at several places around each
bearing surface. If not within specification, grind
the journals and install undersize bearings, or
replace the crankshaft.
Figure 6-123
TNV DI Service Manual
R
R
(1)
(2)
0001733A