WORKSHOP MANUAL - lombardini service

Fuel system
7
Injection advance control and regulation
153
- Dismount the rocker arm cover (see page 32).
- Position the device on the head, in contact with cylinder no. 1.
- Mount the dial gauge on the valve controlled by tool ref. 1460.048.
- Via lever 1 of the tool, open the valve until it comes into contact
with the piston.
- Then rotate the crankshaft until the TDC is read in the dial gauge.
Then reset the hundredths.
- Remove the fuel pipes.
- Remove the O-ring in contact with the non-return valve and
replace it with the appropriate gasket - equipment component part
ref. 1460.074. Once the check has been completed, remove the
gasket and refit the O-ring.
Connect tool 1460.074 on pump 1. This will automatically position
the control lever to the maximum delivery. The tool is provided
with 3÷4 couplings for connection to a tank that must be not lower
than 30 cm from the pumps level. Coupling 2 is equipped with a
plastic pipe 5 with internal drip collecting wire.
- Put cylinder 1 under compression and open the tank tap. Fuel
diesel will start to flow out from coupling 2.
- Slowly rotate the engine towards TDC 1 until the diesel fuel stops
leaking out.
- At this point with lever 1 (of fig. 153) move again the valve until it
touches the piston and read on the dial gauge how many
hundredths are missing from the previously reset value (TDC).
- To convert hundredths into degrees, consult the table below.
- Repeat the operation on the other cylinders.
154
α (mm)
18°
2.468
17°
2.205
16°
1.956
15°
1.721
14°
1.501
13°
1.296
12°
1.105
11°
0.930
10°
0.769
9°
0.623
8°
0.493
7°
0.378
6°
0.277
Injection advance
Code Reference n° Rpm α
6590-290
235-4
> 3600
13°÷15°
FOCS Workshop Manual_cod. 1.5302.858_1° ed_ rev. 00
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