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Engine control unit: replacing, encoding and adapting > < Pump-injector set: removing and installing|Remove
Assembly
Assembly
  Note!
t  If fitting a new injector-pump unit, the corresponding adjustment bolt on the rocker must also be replaced.
t  Any time work requiring adjustment of the injector-pump unit is carried out, clean the adjustment bolt on the rocker and the round-headed pin on the injector-pump unit, also checking for wear. If worn, the round-headed pin and the adjustment bolt must be replaced.
t  Apply -G 000 100- to the contact surfaces between the round-headed pin and the adjustment bolt.
t  New injector-pump units are supplied with their own O-rings and heat shield seal.
–  If the used injector-pump unit is refitted, replace the O-rings and the heat shield seal → Chapter.
–  Before assembly of the injector-pump unit, check the three seals, the heat shield seal and the safety washer for correct seating.
  Note!
The seals must not be bent.
–  Oil the seals and fit the injector-pump unit very carefully in its seating in the cylinder head.
–  Pressing uniformly, seat the injector-pump unit all the way on to the cylinder head.
–  Fit the fixing block in the side slot of the injector-pump unit.
  Note!
If the injector-pump unit is not perpendicular to the fixing block, the fixing bolt may come loose, and this could result in damage to the injector-pump unit or the cylinder head.
–  Therefore, the injector-pump unit must be fitted as follows.
–  Screw the new bolt into the fixing block until the injector-pump unit can still be turned slightly.
   
–  Fit a dial gauge over the injector-pump unit cam as shown in the illustration.
–  Turn the crankshaft in direct of engine turn-over until the rocker roller is at the point of the activator cam. Side of the roller -arrow A- is at the highest point. Dial gauge -arrow B- is at the lowest point.
–  Remove the dial gauge.
–  Screw the adjustment bolt into the rocker until you feel clear resistance (injector-pump component is at stop).
  E23-0030
–  Unscrew the adjustment bolt. 225° from the stop.
–  Hold the adjustment bolt in this position and tighten the lock nut to a torque of 30 Nm.
–  Attach the connector of the injector-pump unit and fit the cylinder head cover and the toothed belt shield.
  N23-0342

Engine control unit: replacing, encoding and adapting > < Pump-injector set: removing and installing|Remove