Lombardini LDW 502, Service Manual

Page: 65 / 98

- 65 -
service manual
mod. 051135
7
F
E
D
C
A1
A
B
4 - Mount the collar (C), the spring (D), the
cup (E) and the half collets (F).
5 - Press down hard on the cup (E), using the
special tool “7107-1460-047” to insert the
half collets (F) into the valve stem groove.
6 - Release the tool and check that the half
collets are positioned correctly.
If the half collets are not correctly
positioned, repeat the operation.
7 - Repeat the same operation on the other
valves.
7.5.1 Installing piston/connecting rod -
engine block
Important
Make sure that the engine block and the
crankcase are perfectly clean and dry.
1 - Assemble the pipe (A) with the oil suction
filter.
2 - Mount the new O-rings (A1).
3 - Carefully clean and lubricate the cylinders
and the connecting rod-piston assembly
(B).
4 - Rotate the sealing rings so that the cuts
have a displacement of about 120°
between them.
Important
In order not to damage the sealing rings
and the contact areas while inserting the
piston into the cylinder, use the special
containment device.
5 - Mount the connecting rod-piston
assembly (B) onto the engine block and
position the connecting rod big ends
along the axis of the crankshaft.
Important
The piston combustion chamber must be
assembled on the precombustion
chamber.
7.5 INSTALLATION OF CRANK GEAR AND CRANKCASE
INSTALLATION OF ASSEMBLIES