Lombardini 15 LD 315 User Manual

34
DATE
22.12.2003
COMPILER TECO/ATI
REG. CODE
1-5302-467
MODEL N°
50707
DATE OF ISSUE
06-95
REVISION 05
ENDORSED
43 44
VIII
45
46
47
522DL51513DL51004-053DL51044DL51
A
511.0÷70.001.0÷70.011.0÷530.011,0÷70,0
B
80.0÷40.080.0÷50.090.0÷050.090,0÷50,0
C
70.0÷30.0570.0÷40.0780.0÷030.070,0÷30,0
DISASSEMBLY/REASSEMBLY
Piston rings, play between the slots (mm)
Replace the piston or piston rings if the value exceeds the
maximum limit.
Piston rings, assembly order
A = 1st Chromium plated piston ring (nitrided for 225-350-400)
B = 2nd piston ring (torsional)
C = 3rd piston ring (oil scraper) (nitrided for 225-350-400)
D = Chromium plated zone
Note: If a word (top, or some other word) is written on the surface of
a piston ring, mount that surface upwards.
Before inserting the piston into the cylinder, oil and turn the
piston rings so that the cuts are staggered 120° to each
other.
In 15 LD 350 and 15 LD 225 engines, the second piston ring
is not torsional, while the first and third piston rings do not
have chromium plated zones but are nitrided.
Lubricate the following parts with oil before mounting: the
piston pin, the piston, the cylinder and the big-end bearing
Piston - Refitting
Connect piston to connecting rod, lubricate piston pin and introduce
it into the piston/connecting rod assembly by exerting pressure with
your thumb.
Fit both piston pin circlips and check that they are well seated.
When introducing both the connecting rod and the piston into the
cylinder make sure that the larger crown surface A (if compared to
the combustion chamber) is on the same side as the pushrod
opening B.
Clearance
A = Clearance
C = Head gasket
The thickness of gasket C determines the clearance A, which must
be 0.45-0.55 mm for 15 LD 315 with injection pump serial N° 6590-
259; it is 0.50-0.60 mm with injection pump serial N° 6590-281.
The clearance is 0.45-0.55 mm for 15 LD 225 in all cases.
The clearance is 0.50-0.60 mm for 15 LD 350-400-440 in all cases.
For the correct thickness of gasket C see table in fig. 49÷50.
There are gaskets with inner diameters oversized by 1 mm for 15
LD 315 and 15 LD 350, required if the cylinders are ground.

Lombardini 15 LD 315 Specifications

General

Brand	Lombardini
Model	15 LD 315
Category	Engine
Language	English