WÄRTSILÄ Vasa R22, Instruction Manual

Page: 167 / 297

6 Inspect and measure
the details for wear (section 06.2).
7 Oil the details with lubricating oil before reassembling.
8 Measure the axial clearance of the rocker arms after
assembling, minimum 0.15 mm, see chapter 06.
14.1.3.2 Dismantling and assembling the valve tappets
1 Remove the rocker arm bracket (13) first.
2 Remove the push rods (4) and the protecting sleeves (5)
3 Unscrew the nuts (6) and remove the guide block (7) from
the engine.
4 Remove the cover (8) and the guiding pin (10) to clean
and measure the guide block bores. Change the O-rings of the
cover if they are damaged or hard.
5 Remove the screws (15) and remove the securing plate (16).
6 The valve tappets (11) can now be withdrawn. Mark the
components so that they can be refitted in the same position.
7 The tappet rollers, bushes and pins are separated by push-
ing out the pin (12).
14.1.3.3 Inspection of valve mechanism parts
1 When cleaning the components,
pay special attention
to the angular holes in the tappet and the pin.
2 Inspect and measure the components for damage and
wear, section 06.2.
3 When reassembling, it is advisable to lubricate the com-
ponents with clean lubricating oil.
4 When fitting the securing plate (16), use undamaged cor-
ners of the sheet to lock the screws (15). Take care that there
are — or are caused — no metal parts which may come loose.
5 Before fitting the guide block, check the flange gasket
and replace it by a new one, if necessary.
14.2 Camshaft
14.2.1 Description of camshaft
The camshaft is built up of one-cylinder camshaft pieces (1) and
separate bearing journals (2). The drop forged camshaft pieces have
integrated cams with case hardened sliding surface.
22-9601 Valve Mechanism and Camshaft 14
VASA 22 14 - 3