Bosch 5302 Technical Information download pdf (Page 26)

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Workshop Manual__3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03

Disassembly / Reassembly

Drive shaft

There are two types of standard drive shafts:

A Automotive type (agricultural machines)

B industrial type (motor pumps generating set, etc.)

Note: For left-handed engines, i.e 3LD 510/S, the drive shaft

turns anticlockwise (seen from the ywheel position) and

their thread is clockwise on the power takeoff side as well

as on the ywheel side.

Drive shaft lubrication ducts

Caution – Warning

Always wear protective goggles if compressed air is used.

Remove the caps, clean the ducts A and B with a point and

blow them with compressed air.

Replace the caps by caulking them on their seat, then check

their seal.

Drive shaft connecting radius

R = 3 mm

1 = 3.5 mm

Note: When the main journal and the crank are ground, it is

essential to reset R and R1 values in order to avoid any

possible breaking of the drive shaft.

Drive shaft main journal and crank diametres (mm)

3LD 450, 3LD 510, 3LD 451/S, 3LD 510/S

A = 39.990 ÷ 40.000

B = 41.987 ÷ 42.000

C = 41.990 ÷ 42.000

D = 29.990 ÷ 30.000

4LD 640, 4LD 705, 4LD 820

A = 44.900 ÷ 45.000

B = 55.340 ÷ 55.353

C = 44.900 ÷ 45.000

D = 29.990 ÷ 30.000

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Bosch 5302 Technical Information Page 26