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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
4021-309-206-205WDL
BDE
58,1÷0,10,6÷52,51,7÷0,7
T/4021WDL
BDE
51,1÷5,0
5,6÷59,5
1,7÷0,7
65 66
4
67
68
Pump/injector unit - non-return valve
Non-return valve A immediately stops the engine whenever the stop
is activated.
Dimensions (mm):
Note: If the value of B is not achieved, the two rings C are not
subject to enough compression to ensure the seal; any fuel
loss would contaminate the lubrication oil and consequently
damage the engine, F = metal gasket.
Pump/injector unit - Disassembly
When the removal (but not replacement) of a unit injector is
required the following procedure may be used to avoid the need for
other adjustments:
Rotate the engine until the unit injector cam lobe 2 forces the cam
follower 1 to the highest position, then insert a suitable sized
(hardened) pin into the hole 3 and rotate the engine until the cam
follower 1 is at the lowest position. In this way the injection advance
regulator 4 remains calibrated.
Note: If you dismount more than one pump/injector unit, make
sure to reinstall them in the appropriate housing (with
relative drive rod 5); before mounting lubricate the drive rod
at its two ends with MOLYSLIP, AS COMPOUND 40 type.
Rocker arm assembly
Remove the nuts attaching the rocker arm assembly to the cylinder
head.
When refitting tighten the nuts at a torque of 40 Nm.
The pin, that is hollow inside to allow lubrication, is closed at its
ends by two caps.
Note: The rocker arm assembly may be removed without removal
of the unit injectors.
Disassembly / Reassembly
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