Tandem Pump, Removing and Installing

Tandem Pump, Removing And Installing







Special tools, testers and auxiliary items required
- Torque wrench (5 to 50 Nm) V.A.G 1331
- Hand vacuum pump V.A.G 1390
- Hand vacuum pump reservoir V.A.G 1390/1
- Pliers for spring type clips VAS 5024

Removing







- Pull off supply hose - 1 - (white marking) and return hose - 2 - (blue marking) from fuel filter.
- Connect hand vacuum pump V.A.G 1390 with hand vacuum pump reservoir V.A.G 1390/1 to return hose.
- Operate hand vacuum pump until no more fuel runs from return hose. Make sure that no fuel is sucked into hand vacuum pump.
- Loosen charge air tube and set aside.







- Pull vacuum line - 1 - from brake booster off of tandem pump - 4 -.
- Disconnect central connector for Pump-Injector unit.
- Pull supply hose - 2 - (white marking) off of tandem pump - 4 -
- Remove bolts - arrows -.
- Remove the tandem pump - 4 - from the cylinder head.
- Pull tandem pump - 4 - slightly upward, pull off return hose - 3 - (blue marking) and remove tandem pump - 4 -.

Installing
Installation is performed in the reverse order of removal, note the following:

NOTE:
- Make sure that the tandem pump is properly seated in the camshaft.
- Always replace the seals of the tandem pump.







- Connect return hose - 3 - (blue marking) to return connection on tandem pump.
- Install tandem pump and tighten upper bolts to 20 Nm.
- Tighten lower bolts to 10 Nm.
- Connect supply hose - 2 - (white marking) to supply connection and vacuum line - 1 - from brake booster to tandem pump - 4 -.
- Connect central connector for Pump-Injector unit.
- Install charge air tube.







- Connect supply hose - 1 - (white marking) to fuel filter.
- Connect hand vacuum pump V.A.G 1390 with hand vacuum pump reservoir V.A.G 1390/1 to return hose - 2 - (blue marking) of fuel filter.
- Operate hand vacuum pump, until fuel runs from return hose. Make sure that is sucked into hand vacuum pump.
- Connect return hose - 2 - (blue marking) to fuel filter.