300SD (140.134) L6-3.5L DSL Turbo (603.971) (1993)
Vacuum Pump: Removal and Replacement
Double Diaphragm
Removal
1. Drain a portion of engine coolant from radiator.
2. Disconnect upper coolant hose, then remove fan and radiator shroud.
3. Remove power steering pump drive belt.
4. Disconnect vacuum lines, then remove vacuum pump attaching bolts and pump.
Installation
1. Thoroughly clean vacuum pump sealing surfaces.
2. Install pump with new gasket to crankcase, ensuring intermediate sleeve is correctly installed and two guide pins are properly positioned in
crankcase.
3. Connect vacuum lines to pump, then install power steering pump drive belt, radiator shroud, fan and coolant hose.
Single Diaphragm
Removal
1. Disconnect vacuum lines from vacuum pump.
2. Remove vacuum pump attaching bolts, then vacuum pump and gasket, from crankcase.
Installation
1. Disconnect vacuum lines from vacuum pump.
2. Remove vacuum pump attaching bolts, then vacuum pump and gasket, from crankcase.
Piston
Removal
1. Disconnect vacuum line from vacuum pump.
2. Remove vacuum pump attaching bolts, then vacuum pump and gasket from crankcase.
Installation
1. Install vacuum pump to crankcase using a new gasket, then tighten attaching bolts securely.
2. Connect vacuum line to pump.