1968 – 1979 VW 1600 Transporter Fuel Pump Description, Checking, and Filter Cleaning

The fuel pump is mounted on the engine crankcase to the right of the distributor and is operated mechanically from underneath by a vertical pushrod actuated from a cam on the distributor drive shaft.

The fuel is pumped by means of a captive flexible spring loaded diapraghm which draws fuel into the pump when on its down stroke and forces it out to the carburettor under the action of its return spring. The fuel flows in and out through two one way valves. When the carburettor is full the diaphragm cannot move up under its spring so the constantly moving pushrod and rocker merely ‘free wheel’ until the diaphragm once more moves up to be drawn down again.

1968 – 1979 VW 1600 Transporter Fuel Pump Cross Section

1968 - 1979 VW 1600 Transporter Fuel Pump

1. Push rod
2. Operating lever
3. Petal valve (suction)
4. Outlet valve
5. Spring for diaphragm
6. Diaphragm
7. Lever spring
8. Cover
9. Petal valve retainer
10. Fuel inlet
11. Top cover gasket
12. Top cover
13. Cover screw
14. Filter screen
15. Fuel outlet

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