Kohler Lombardini LDW FOCS 502 Euro 2, Service Manual

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Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
6.5 DIAGRAM OF TIMING BELT RATES
Rotate the crankshaft clockwise to find out the timing
rates of the entire cycle in each cylinder (operation and
control).
Timing belt operating angles (valve clearance 0.25
mm)
α = 14° before S (top dead center)
β = 38° after I (bottom dead center)
γ
=
34°
before
I
(bottom dead center)
δ
= 18° after S (top dead center)
Timing belt control angles (valve clearance 2 mm)
α = 25° after S (top dead center)
β = closes 2° after I (bottom dead center)
γ
=
5°
after
I
(bottom dead center)
δ
= 18° before S (top dead center)
6.6 ADJUSTING STATIC INJECTION TIMING
In order to adjust injection timing, it is necessary to
remove the rocker arm cover.
See “Disassembling rocker arm cover” for the correct
procedure.
1. Disassemble the injector pump fuel rail ( A ).
2. Select the cylinder on which the injection static
advance adjustment will be carried out.
3. Unscrew the rocker arm support nut (
B
) corresponding
to the cylinder on which the procedure will be
carried out.
Legenda
S
= piston at top dead center
I
= piston at bottom dead center
α
= intake valve open
β
= intake valve closed
γ
= exhaust valve open
δ
=exhaust valve closed
OVERHAULS AND TUNING