Lombardini 3LD 450, Workshop Manual

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Workshop Manual__3 - 4 LD_cod. ED0053025560_
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03
Fuel injection circuit
Injection pump
Components:
1 Delivery fitting 11 Spring
2 O-ring 12 Pumping piston
3 Spring 13 Tappet case
4 Delivery valve 14 External roller
5 Gasket 15 Internal roller
6 Barrel 16 Pin
7
Pump case
17
Lock ring
8 Eccentric 18 Rack rod
9 Sector gear 19 Lock pin
10 Spring bearing cap 20 Collar
Tighten the pump at its base at 30 Nm.
Injection pump assembly
Insert the cylinder 6 in the pump case 7 , engaging the slot A in
the eccentric 8 .
Insert the delivery valve 4 , copper gasket 5 , spring 3 O ring 2 ,
then tighten the fitting at 3.5 ÷ 40 Nm.
Assemble the rack rod 18 and sector gear 9 coinciding points B .
Insert the upper collar 10 , spring 11 and piston 12 with
reference C on the same side of the slot A (if it is assembled on
the opposite side, the engine revs out).
Assemble the collar 20 , the tappet 13 with rollers 14 , 15 and
pin 16 .
While pressing on the tappet, insert the pin 19 and the ring 17 .
Advanced injection (static)
Disconnect the diesel oil thrust pipe fitting, being careful not to
loosen also the pump delivery fitting 1 , then screw the tester for
the advanced injection check 2 .
Fill the tank, checking that the fuel level is at least 10 cm above
the tester. Place the accelerator lever halfway.
Turn the flywheel towards the engine rotation direction and make
sure that the fuel arrives at the tester assembled on the injection
pump delivery fitting.
Repeat this operation; during the compression phase, operate
slowly and immediately stop when the fuel moves into the tester
hole; move the flywheel 3 mm back; this is the static advanced
injection.
If C does not coincide with B but comes before, add some
shims under the pump, otherwise, remove the shims if C is
beyond B .
Note : By removing or adding a 0.1 mm shim under the pump, it
is possible to delay or advance C , which is after B .