Service Data and Specifications (S.D.S.) — Inspection and Adjustment — CD20 (Cont'd)
EM-283spec tableCD20 diesel engine specifications.
PISTON, PISTON RING AND PISTON PIN
Piston
Piston (Unit: mm (in))
Piston skirt diameter — Standard
Grade / Sub-itemGrade No. 1
Value84.465 - 84.475 (3.3254 - 3.3258)
Piston skirt diameter — Standard
Grade / Sub-itemGrade No. 2
Value84.475 - 84.485 (3.3258 - 3.3262)
Piston skirt diameter — Standard
Grade / Sub-itemGrade No. 3
Value84.485 - 84.495 (3.3262 - 3.3266)
Piston skirt diameter — Standard
Grade / Sub-itemGrade No. 4
Value84.495 - 84.505 (3.3266 - 3.3270)
Piston skirt diameter — Standard
Grade / Sub-itemGrade No. 5
Value84.505 - 84.515 (3.3270 - 3.3274)
Piston skirt diameter — Oversize
Grade / Sub-item0.25 (0.0098)
Value84.715 - 84.765 (3.3352 - 3.3372)
Piston skirt diameter — Oversize
Grade / Sub-item0.5 (0.020)
Value84.965 - 85.015 (3.3451 - 3.3470)
Measure position (From Top)
Grade / Sub-item
Value62 (2.44)
Piston pin hole diameter
Grade / Sub-item
Value24.991 - 24.999 (0.9839 - 0.9842)
Piston ring
Piston ring (Unit: mm (in))
Side clearance
RingTop
Sub-itemStandard
Value0.060 - 0.095 (0.0024 - 0.0037)
Side clearance
RingTop
Sub-itemLimit
Value0.10 (0.0039)
Side clearance
Ring2nd
Sub-itemStandard
Value0.040 - 0.075 (0.0016 - 0.0030)
Side clearance
Ring2nd
Sub-itemLimit
Value0.10 (0.0039)
Side clearance
RingOil
Sub-itemStandard
Value0.030 - 0.070 (0.0012 - 0.0028)
Ring gap
RingTop
Sub-itemBore grade 1, 2, 3
Value0.20 - 0.30 (0.0079 - 0.0118)
Ring gap
RingTop
Sub-itemBore grade 4, 5
Value0.12 - 0.22 (0.0047 - 0.0087)
Ring gap
Ring2nd
Sub-itemStandard
Value0.38 - 0.53 (0.0150 - 0.0209)
Ring gap
RingOil
Sub-itemStandard
Value0.30 - 0.55 (0.0118 - 0.0217)
Piston pin
Piston pin (Unit: mm (in))
Piston pin outer diameter
Value24.994 - 25.000 (0.9840 - 0.9843)
Interference fit of piston pin to piston
Value0 - 0.004 (0 - 0.0002)
Piston pin to connecting rod clearance
Value0.025 - 0.044 (0.0010 - 0.0017)
CONNECTING ROD
Connecting rod (Unit: mm (in))
Bend [per 100 mm (3.94 in)]
Sub-itemStandard
ValueLess than 0.025 (0.0010)
Torsion
Sub-itemStandard
ValueLess than 0.025 (0.0010)
Piston pin bore dia.
Sub-item
Value25.025 - 25.038 (0.9852 - 0.9857)
Big end play
Sub-itemLimit
Value0.3 (0.012)
CRANKSHAFT
Crankshaft (Unit: mm (in))
Main journal dia.
Sub-itemGrade No. 0
Value52.967 - 52.975 (2.0853 - 2.0856)
Main journal dia.
Sub-itemGrade No. 1
Value52.959 - 52.967 (2.0850 - 2.0853)
Main journal dia.
Sub-itemGrade No. 2
Value52.951 - 52.959 (2.0847 - 2.0850)
Pin journal dia.
Sub-itemGrade No. 0
Value49.968 - 49.974 (1.9672 - 1.9675)
Pin journal dia.
Sub-itemGrade No. 1
Value49.961 - 49.968 (1.9670 - 1.9672)
Pin journal dia.
Sub-itemGrade No. 2
Value49.954 - 49.961 (1.9667 - 1.9670)
Out-of-round (X − Y) and taper (A − B)
Sub-itemStandard
ValueLess than 0.005 (0.0002)
Runout
Sub-itemStandard
ValueLess than 0.05 (0.0020)
Free end play
Sub-itemStandard
Value0.05 - 0.18 (0.0020 - 0.0071)
Free end play
Sub-itemLimit
Value0.3 (0.012)