How to Disassemble the Cummins M11 series engine water pump and accessories

 (1) Disassembly of the water pump 

 ① Remove the two inlet pipe connector bolts and the three water pump mounting bolts. Rotate the water pump outwards to remove the inlet pipe connector, see Figure 2-36. 

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 ② Rotate the top of the water pump outwards to tilt the rear of the pump downwards, and remove the water pump from the thermostat housing bracket, see Figure 2-37.

 (2) Disassembly of water pump accessories

 ① Disconnect the wiring harness from the coolant temperature sensor, loosen the air compressor return pipe connector, remove the four bolts and the thermostat housing bracket, see Figure 2-38. 

② Remove the four bolts, the coolant heater housing, and the gasket, see Figure 2-39. 

③ Remove the three bolts, remove the coolant filter seat and the two O-rings, see Figure 2-40. 

④ Remove the water channel cover mounting bolts, sealing gasket, and guide pin, see Figure 2-41. 

⑤ Remove the inspection hole cover and oil dipstick tube bracket, see Figure 2-36. Remove the connector bolts and mounting bolts, and remove the water inlet pipe connector.

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Figure 2-37 shows the water pump being removed from the thermostat housing. 

 

 

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Figure 2-38 Removing the thermostat housing bracket 

 

 

Figure 2-39 Removal of coolant heater housing and gasket

 

Figure 2-40 Remove the coolant filter housing and two O-rings. 

 

 

 

Figure 2-41 Removing the drain cover 1, 2—Bolts 

 

 

Figure 2-42 Remove the access cover and oil dipstick bracket. Bolts 1 and 2