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Inspecting a tandem pump > < Removing and installing tandem pump, vehicles with engine identification characters BKD, AZV

Octavia Mk2

Removing and installing tandem pump, vehicles with engine identification characters BMM
Removing and installing tandem pump, vehicles with engine identification characters BMM
Special tools and workshop equipment required
t  Diesel extractor, e.g. -VAS 5226-
t  Pliers for spring strap clamps
Removing
  WARNING
Under no circumstances must the tandem pump be disassembled, otherwise it can lead to malfunction of the vacuum part. This will result in a failure of the brake booster.
  Caution
Observe instructions for installing again a used tandem pump → Chapter.
  Note
t  Safety precautions when working on the fuel supply system → Chapter.
t  Observe the regulations concerning cleanliness when working on the fuel supply/injection system → Chapter.
–  Remove engine cover → Chapter.
–  Remove air filter → Chapter.
   
–  Remove fuel intake hose -2- (marked in white) from the tandem pump.
–  Remove fuel return-flow hose -1- (marked in blue) from the fuel line.
  A20-0891
–  Connect diesel extractor -VAS 5226- to fuel return-flow hose.
–  Apply compressed air to diesel extractor -VAS 5226-.
–  Operate diesel extractor -VAS 5226- until no more fuel comes out of the fuel return-flow hose.
  A20-0899
–  Disconnect the vacuum hose to the brake servo unit at the tandem pump -arrow-.
–  Pull out the central plug for the unit injectors.
  A10-1851
–  Release screws -arrows-.
–  Remove tandem pump -4- from cylinder head.
Install
Installation occurs in reverse order to removal. Pay attention to the following:
  Note
t  Ensure that the driver of the tandem pump is correctly seated in the camshaft.
t  Always replace the tandem pump seals.
–  Install tandem pump and tighten the top fixing screws (M8) to 20 Nm.
–  Tighten bottom fixing screws (M6) to 8 Nm.
–  Connect the fuel intake hose and the vacuum hose at the tandem pump.
  A20-0611
–  Connect diesel extractor -VAS 5226- to fuel return-flow hose.
–  Operate diesel extractor -VAS 5226- until fuel flows out of the fuel return-flow hose.
–  Connect the fuel return flow hose (marked in blue) to the fuel line.
–  Connect central plug for unit injectors.
  A20-0899

Inspecting a tandem pump > < Removing and installing tandem pump, vehicles with engine identification characters BKD, AZV