This document describes the disassembly of the injectors and rocker arm housing of the Cummins M11 series engine.

 

① Remove the injector fixing screws and clamps, and use an injector puller (part number 3823579) to remove the injectors from the engine. Mark the cylinder number on each injector, see Figure 2-80. ② Remove the rocker arm housing and other parts, see Figure 2-81. (6) Cylinder Head Removal 

 ① Remove 7 bolts from the cylinder head, and remove the three bolts inside the intake port, see Figure 2-82. 

 ② Remove the remaining 32 bolts from both ends to the middle, see Figure 2-83. The order shown in the figure is the tightening order when installing the bolts; the order is reversed during disassembly. 

 ③ Install the cylinder head lift bracket (part number 3822479) in the middle of the cylinder head, see Figure 2-84. Bolt 1 is M14-2.00x35, bolt 2 is M10-1.50x15, and the tightening torque is 47 N·m.

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Figure 2-80: Remove the fuel injectors using a puller and mark their cylinder numbers. 

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 Figure 2-81 Removing parts such as the rocker arm chamber housing

 

Figure 2-82 Remove cylinder head bolts

 

 Figure 2-83 Remove the remaining 32 bolts from both ends to the middle.

 

④ Use a crane to lift the cylinder head and lower it down, as shown in Figure 2-85, and remove the cylinder head gasket. 

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 Figure 2-84 Installing the cylinder head lift bracket in the middle of the cylinder head using bolts 1 and 2.

 

 

 

 Figure 2-85 shows the cylinder head being lifted and lowered using a crane.

Remove the nut and washer from the cam follower bracket. Insert the cam follower removal tool (part number 3824519) under the follower and around the bracket, continuing to insert the tool forward until the adjusting screw at the top of the tool can be screwed into the injector cam follower recess by hand, as shown in Figure 2-86. Lift the cam follower assembly and remove it from the engine, as shown in Figure 2-87.