Technical information

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Workshop Manual_3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03
Disassembly / Reassembly
Drive shaft internal diam. crankshaft bearing / connecting
rod head and clearances regarding their respective pins
(mm)
3LD 450, 3LD 510, 3LD 451/S, 3LD 510/S
E = 40.040 ÷ 40.050 F = 42.028 ÷ 42.052
G = 42.04 ÷ 42.05 H = 30.07 ÷ 30.09
A, B, C, D, see picture 45
E - A = 0.040 ÷ 0.060 worn limit 0.12
F - B = 0.028 ÷ 0.065 worn limit 0.13
G - C = 0.040 ÷ 0.060 worn limit 0.12
H - D = 0.070 ÷ 0.10 worn limit 0.18
4LD 640, 4LD 705, 4LD 820
E = 45.045 ÷ 45.070 F = 55.40 ÷ 55.43 G = 45.045 ÷ 45.070
A, B, C, D, see picture 45
E - A = 0.065 ÷ 0.080 worn limit 0.16
F - B = 0.051 ÷ 0.10 worn limit 0.18
G - C = 0.45 ÷ 0.080 worn limit 0.16
CAMSHAFT
Components:
1 Base side pin
2 Intake cam
3 Injection cam
4 Exhaust cam
5 Gear
6 Side distributor port pin
Note: The two engine series 3LD 450, 3LD 510 and 4LD 640,
4LD 820 have the same camshaft; it differs in 3LD 451/S
and 3LD 510/S left-handed engines.
Camshaft intake and exhaust cam timing
For 3LD 450, 3LD 510, 4LD 640, 4LD 705, 4LD 820, see picture 48.
Clockwise rotation.
TDC = Top dead centre of the piston
A = Intake cam axis
S = Exhaust cam axis
α = 50° 30' ÷ 51° 30'
For 3ld 451/S, 3LD 510/S, see picture 49
Clockwise rotation
TDC= Top dead centre of the piston
A = Intake cam axis
S = Exhaust cam axis
α = 50° 30' ÷ 51° 30'