B1HJ01K1 - 206 DW8 ENGINE

OVERHAUL INJECTORS

1 - SPECIAL TOOLS

[1] injector socket (-).0149 .

[2] support for injector holder (-).0117-AJ .

[3] Calibration pump FACOM 916.A type .

2 - DISMANTLING

Clamp the support [2] in the vice .

Unscrew the injector holder using the socket [1] .

Maintain the matching of needle and nozzle .

Immerse the parts in test fluid .

3 - REASSEMBLY

NOTE : the fire ring (1) must be fitted, with its curved side towards the nut (2) .

Lubricate the parts with test fluid before fitting .

Tighten the assembly : 3.5 da.Nm+14°5 .

4 - CHECKING THE INJECTORS

IMPERATIVE : use a suitable test fluid .

WARNING : never expose the hands to the spray; risk of injury and serious blood poisoning, the sprayed fluid catches fire very easily .

4 - 1 - CHECK SEALING

Pressure gauge in circuit .

Dry the end of the injector .

Operate the pump lever .

Maintain a pressure 10 bars below the calibration pressure .

No drop should fall from the injector within 30 seconds .

4 - 2 - CHECK SPRAY PATTERN AND INJECTOR GRUNT

Pressure gauge isolated .

Operate the pump lever with short sharp strokes The injector should produce a very fine and even spray .

At a frequency of one or two strokes a second, the injector should have a very soft grunt .

With more rapid strokes, the grunt should disappear .

4 - 3 - CHECK CALIBRATION PRESSURE

Pressure gauge isolated .

Give several rapid pump strokes to bleed the circuit .

Pressure gauge in circuit .

Operate the pump lever very slowly .

Read the pressure at the moment the injector opens .

Calibration pressure 10 bar(s) .

4 - 4 - ADJUSTMENT - CALIBRATION PRESSURE

The calibration is adjusted by means of a thicker or thinner shim (3) .

NOTE : a change in shim thickness of 0,10 mm gives, on average, a calibration pressure change of 10 bars .

WARNING : if faulty parts are found during removal, the measured injector/injector holder must be replaced, replacing the injector alone is not permitted .