Kohler KDI 1903M Workshop Manual page 45

2.16.2 Rocker arm pin
Tab 2.39
POS. DESCRIPTION
1 Rocker arm pin
2 Rocker arm distancing spring
3 Rocker arm pin support
4 Exhaust rocker arm
5 Intake rocker arm
2.16.3 Rocker arms
Tab 2.40
POS. DESCRIPTION
1 Rocker arm body
2 Hydraulic tappet oil refill line
3 Valve tappet lubrication line
4 Valve tappet
5 Hydraulic tappet
6 Oil flow line
2.16.4 Hydraulic tappets
Tab 2.41
POS. DESCRIPTION
A Hydraulic tappets
B Hight pressure chamber
1 Hydraulic tappets oil refill pipe
2 Retaining ring
3 Piston
4 Unidirectional valve
5 Tappet body
2.16.4.1 Hydraulic tappet operation
The operating principle of the hydraulic tappet is based
on the incompressibility of the liquids and on controlled
leakage.
The oil under pressure enters the tappet chamber A,
providing a constant supply of oil in the low-pressure
chamber.
Through the non-return valve, 4 the oil can only access
the high-pressure chamber B and exit via the clearance
between the piston 3 and the tappet body 5 (controlled
leakage).
The chamber B is filled when the rocker arm is on the
base radius of the cam and the spring 6 keeps the piston
TECHNICAL INFORMATION
Fig 2.47
Fig 2.48
Fig 2.49
2
45
EN