Man D 2842 LE 620, Repair Manual

Page: 145 / 180

20
Ø
Ø
1,5
I
II
III
2,5
I
II
III
Limit values
Service Data
Dimensions
143
Pistons
Compression height: 81,250 − 81,300 mm
Piston protrusion above
crankcase top:
0,01 − 0,38 mm
46,030 − 46,040 mm
Piston bolt diameter:
45,994
− 46,000 mm
127,870 − 127,880 mm
Max. difference in weight per engine pis-
ton set: 100g
Piston ring grooves
3,695 − 3,725 mm
3,040 − 3,060 mm
4,02 − 4,04 mm
Piston rings
1st ring − keystone ring
Height: 3,296 − 3,33 mm
2 nd ring − Minute ring:
Height: 2,970 − 2,990 mm
3rd ring − bevelled ring
Height: 3,975 − 3,990 mm
Ring gap:
1.st ring:
0,50 − 0,70 mm
2nd Ring: 0,70 − 0,90 mm
3rd Ring: 0,25 − 0,55 mm