Lombardini LDW 502, Руководство по обслуживанию

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service manual
mod. 051135
6
6 0 , 1 ÷ 7 9 , 0 0
8 4 , 0 ÷ 9 3 , 0
6 1 , 1 ÷ 7 0 , 1 1
5 2 , 1 ÷ 7 1 , 1 2 8 4 , 0 ÷ 0 4 , 0
A
A (mm)
6.3.6 Adjusting valve-rocker arm clearance
In order to make the adjustment, it is necessary
to remove the rocker arm cover.
See “Disassembling the rocker arm cover” for
the correct procedure.
Important
Adjustment of valve clearance must be
done when the engine is cold.
1 - Place the pistons at the compression top
dead centre.
2 - Turn the screw and the lock nut to adjust
clearance. Adjustment can be made in two
different points: the contact area between
the rocker arm and the camshaft (0.15mm)
and/or the contact area between the rocker
arm and the valve (0.2mm).
3 - Repeat the same operation on the other
valves.
6.3.7 Checking clearance volume
1 - Position the pistons at the top dead centre.
2 - Measure the distance in four diametrically
opposite points on the piston crown.
3 - Repeat the operation on all pistons.
The maximum value determines the
measurement (A).
Choose the gasket corresponding to the
measured value. This match determines the
value of the clearance volume (see “Table of head
gasket and clearance volume values”).
Table of head gasket and clearance volume values
Number of holes
Clearance
volume (mm)
OVERHAULS AND TUNING