Disassembly instructions for the oil pump, camshaft, and gear housing of the Cummins M11 series engine



(1) Disassembly of the oil pump: When disassembling the oil pump, it is strictly forbidden to pry the gear pump flange to avoid damaging the oil pump. Remove the three mounting bolts and two spacers, screw the two M8-1.25 bolts into the puller, and remove the oil pump from the engine, as shown in Figure 2-118.

Figure 2-117: Remove the bolts and remove the oil pump with the puller.

(2) Camshaft Disassembly: Rotate the camshaft so that the camshaft gear hole is aligned with the thrust bracket bolt hole. Remove the two thrust bracket bolts, and then remove the three bolts, rear cover plate, and gasket, as shown in Figure 2-118. ② Install the camshaft installation guide tool, part number 3376388. Insert the expander (part number 3376923) through the opening in the rear cover plate into the camshaft. Turn the bolt inside the expander clockwise to open the expansion plug, see Figure 2-119.

Figure 2-120 Insert the mandrel bushing onto the expander and install the extension rod. 2—Mandrel bushing 3—Extension rod
Figure 2-121 The rotating camshaft pulls it out of the cylinder block.