47
Fig. 2.51
Tab. 2.41
Tab. 2.42
Tab. 2.43
1
1
5
4
3
26
2
3
4 5
Fig. 2.52
Fig. 2.53
ED0053030410
TECHNICAL INFORMATION
2.16.3 Rocker arm pin
2.16.4 Rocker arms
POS. DESCRIPTION
1 Rocker arm pin
2 Rocker arm distancing spring
3 Rocker arm pin support
4 Exhaust rocker arm
5 Intake rocker arm
POS. DESCRIPTION
1 Rocker arm body
2 Hydraulic tappet oil rell line
3 Valve tappet lubrication line
4 Valve tappet
5 Hydraulic tappet
6 Oil ow line
2.16.2 Timing system phasing angles
Important
• For information purposes, Tab. 2.41 reports the timing system
diagram phasing angle values.
• It should be noted that the said values may be verified by
rotating the crankshaft (Pos. 1 of Fig. 2.50), by means of
handling the rocker arm control rod (Pos. 4 of Fig. 2.49).
NOTE: Detecting the value by means of handling the
rocker arm/valves may not be correct due to the
hydraulic tappets, which may compress and create
clearances that alters the actual value.
Intake cicle
Crankshaft rotation
Exhaust cicle
INTAKE
OPENING
T.D.C.
B.D.C.
EXHAUST
CLOSURE
INTAKE
CLOSURE
EXHAUST
OPENING
VIEW OF FLYWHEEL SIDE (1
ST
PTO)
INTAKE EXHAUST
opens 12°
before TDC
opens 22°
before BDC
closes 36°
after BDC
closes 8°
after TDC
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