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KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_
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Disassembly / Reassembly
Pump/injector unit - non-return valve
Non-return valve A immediately stops the engine whenever the
stop is activated.
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.
Important
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.
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