CYLINDER HEAD ASSEMBLY 12
Rocker assembly
To remove and to fit12A-02
To remove
1Remove the rocker cover, operation 12A-01.
2 Release evenly and gradually the fasteners of
the rocker shaft brackets; begin with the end
brackets and move toward the centre. Remove the
fasteners and the washers and lift off the rocker
assembly.
Note: The washers between the fasteners and the
rocker brackets have been removed on the latest
engines and new flange faced nuts and setscrews
have been fitted.
3 Remove the rubber oil seal (A) from the oil
supply connection or from the oil supply hole in the
cylinder head.
To fit
1 Fit a new rubber oil seal in the oil supply hole in
the cylinder head.
2 Check that the push rods fit correctly in the
sockets of the tappets. Fit the rocker assembly;
ensure that the oil supply connection is fitted
correctly into the oil seal. Check that the ends of
the adjustment screws fit correctly in the sockets of
the push rods.
3 Fit the washers (if fitted) and fasteners of the
rocker shaft brackets and tighten the fasteners
evenly and gradually; begin with the inner fasteners
and work towards the end fasteners. Tighten the
fasteners evenly to the correct torque according to
the material of the rocker shaft brackets:
Aluminium 40 Nm (30 lbf ft ) 4,1 Kgf m.
Cast iron 75 Nm (55 lbf ft) 7,6 Kgf m.
Sintered steel 75 Nm (55 lbf ft) 7,6 Kgf m.
PA047
Perkins Phaser/1000 Series, April 1995 12A.05
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