SERVICE MANUALROBERT BOSCH MODEL MW INJECTION PUMPSection 11Figure 29.REPLACING HAND PRIMING PUMPThe hand priming pump is threaded into the supply pumphousing (Figure 30). After removing old priming pump,place Loctite hydraulic sealant on pump threads andinstall new pump with new copper washer.ALWAYS TIGHTED HAND PRIMING PUMP HANDLEAFTER USE. THE PUMP WILL LEAK AND BEDAMAGED IF HANDLE IS LOOSE DURING ENGINEOPERATION.Figure 30. - Hand Priming PumpREPLACING FUEL SUPPLY PUMPThree washers, lock washers and nuts retain the supplypump to pump housing (Figure 31). Remove theseparts, fuel inlet and oil outlet fittings and hand primingpump to remove old pump. Install new supply pumphousing mounting gasket when installing new pump.The supply pump will be easier to install if engine isrotated so injection pump camshaft eccentric is in lowestposition.Figure 31. - Replacing Fuel Supply PumpREPLACING LUBRICATING OIL FITTINGSLubricating oil enters the pump from an external oil linewhich originates at a crankcase fitting just above the fuelfilters. The oil line connects to a brass elbow and theelbow to the injection pump inlet connector (Figure 32).If tightening these fittings does not stop oil leakage,replace oil line grommet, brass elbow or inlet connectorand copper washers as necessary.Figure 32. - Lubricating Oil FittingsCGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 22
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