Lombardini CHD series - Crankshaft and Bearing Dimensions; Checking main journals and crank pins; Main journal and connecting rod big end journal diameter; Main bearing and connecting rod big bearing inside diameter (mm)

- 46 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
WDL
T-4002/4002/3051
WDL
T-4022/4022/3061
A
000,85÷089,75 000,06÷189,95 000,06÷189,95
B
000,05÷989,94 000,05÷489,94 000,05÷489,94
89
88
87
4
Main journal and connecting rod big end journal diameter
The crakshaft is made of spheroidal graphite cast iron hardened
at the level of the oil seal rings 1 and 2.
Hardness 55 hrc, hardening depth 0.5÷1.5 mm.
Ref.
Pre-modication
Post-modication Dimensions (mm)
WDL
T/4002-4002-3051
WDL
T/4022-4022-3061
E
660,05÷530,05
F
190,85÷140,85 969,95÷40,95 969,95÷40,95
B-E
770,0÷530,0 051,0 770,0÷530,0 051,0 770,0÷530,0 051,0
A-F
111,0÷140,0 002,0 690,0÷130,0 002,0 690,0÷130,0 002,0
Main bearing and connecting rod big bearing inside diame-
ter (mm)
 Seeg.73and74(page43)forcheckingprocedures.
Note: Both main bearing and connecting rod big end bearings
are available with inside diameter measuring 0.25 and
0.50 mm.
Pre-modication
Ref.
Ref. Clearance
Limit
value
Dimensions
Clearance
Limit
value
Clearance
Limit
value
Post-modication
Checking main journals and crank pins
Use an outside micrometer gauge.
The main bearing, the crankshaft bearing and the thrust washers
have been unied as from engine serial number 7306062 for
LDW1503, from serial number 7303552 for LDW 2004 and from
serial number 7305782 for LDW 2004/T.
Pre-andpost-modicationsinglepartsarenotinterchangeable.
Disassembly / Reassembly
Dimensions (mm)
Dimensions