156633-7000 ZEXEL 9 423 617 252 BOSCH BLEEDER SCREW 9423617252 1566337000

start by: a) remove fuel injection pump housing and governor 1. Remove the fuel from the pump housing. Install the pump housing on tool (A).2. Remove priming pump (1). Remove the fuel filter.3. Remove fuel filter base assembly (2) from the top cover. 4. Remove elbow (3) and disc (4) from the fuel base assembly. The function of disc (4) is to keep the fuel in the pump housing from returning to the tank when the engine is not in operation. If the fuel tank is higher than the fuel pump housing, the disc is not needed. 5. Remove cover (5) and the fuel channel from the pump housing.6. Remove spring and bypass valve (6) from the housing.7. Remove check valve (7).8. Remove the fuel channel from cover (5). 9. Remove check valve (9) and spring from fuel channel (8) if so equipped. Earlier fuel systems have two check valves (7) and (9). Check valve (9) is not needed. Remove check valve (9) and the spring. Fill the hole in the fuel channel with weld, a rivet or a sheet metal drive screw that has sealant on it.Install Fuel Check Valve And Bypass Valve
1. Install fuel channel (1) on cover (2).2. Install spring and bypass valve (3) in the housing with the rounded end up. 3. Install check valve (4) evenly in the pump housing. Do not install a check valve that is bent.4. Install the cover on the pump housing. Be sure the bypass valve spring is in the cover groove. 5. Install disc (5). Install the elbow on the fuel base filter assembly. 6. Install fuel filter base assembly (6) on cover (2).7. Install priming pump (7). Install the fuel filter.8. Remove the fuel injection pump housing and governor from tool (A).end by: a) install fuel injection pump housing and governor