ENGINE 124 Fig. 4 Fig. 2 Fig. 3 REMOVAL OF WATER PUMP 1 Drain cooling water mixed with anti-corrosive/ anti-freeze agent into clean container so that it can be reused. 2 Remove by-pass hose with thermostat. 3 Slacken and remove poly ‘V’ belt. Fig. 2. 4 Unlock and unscrew mounting bolts for pulley and remove water pump pulley. 5 Remove cooling water inlet hose from water pump. 6 Unscrew four water pump mounting bolts from cylinder block and remove water pump. DISASSEMBLY OF WATER PUMP 1 Remove split pin and loosen the castle nut holding pulley hub on water pump shaft. 2 Remove pulley hub from water pump shaft using puller 2576 5890 35 22. Fig. 3. 3 Unscrew and remove water pump rear cover mounting bolts. Remove rear cover. 4 Unlock and remove four screws and plate holding water pump bearing outer race. Remove plate with grease seal, shims and gasket and also outer bearing outer race. 5 Place water pump on housing of support, 312 589 05 33 and press out water pump shaft with bearing assembly from impeller. Fig. 4. Use a steel bar 200 mm long and 15 mm dia meter for pressing out shaft. Remove inner grease seal from housing. 6 Place water pump shaft on a tube supporting inner bearing inner-race with shaft taper end facing upwards. Fix nut on threaded end to protect it from damage and press out shaft from bearings and spacer tube. Remove slinger from shaft. 7 Knock out outer race of inner bearing from pump housing with drift, 321 589 01 35.
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