Cummings Insite 9.3/9.2 /9.1 Pro Diagnostic Software Download & Installation
(1) Removal of the main bearing cap, lower bearing shell, and thrust bearing
① Rotate the engine on the test bench so that the oil pan mounting flange faces upwards. The markings on the main bearing cap must match the numbers on the cylinder block oil pan flange, see Figure 2-134. During installation, the numbers on the main bearing cap and oil pan flange should match, and the locating tongue of the main bearing cap must be aligned with the locating tongue.
②Use the ST-1178 main bearing cap puller to remove the main bearing cap, see Figure 2-135. The No. 4 main bearing cap is connected to the cylinder block by a locating pin, and the No. 4 main bearing shell is fitted with a thrust bearing. During disassembly, it is strictly forbidden to shake the main bearing cap; only the puller can be used to pull the main bearing cap vertically upwards.
Figure 2-133 Marking the tongue plane for positioning the bearing shell on the connecting rod.
③ Remove the lower bearing shell from the main bearing cover and mark the journal number at the time of disassembly on the surface of the locating tongue, as shown in Figure 2-136.
④ Remove the lower thrust bearing from the No. 4 main bearing cover and mark it with the letters "L" and "front" or "rear", as shown in Figure 2-137.
Figure 2-134 shows markings on the main bearing cap and oil pan flanges.
Figure 2-135 Remove the main bearing cover using a puller
Figure 2-136 Marking on the surface of the bearing locating tongue
(2)
① Crankshaft and Upper Bearing Removal
Place nylon slings over connecting rod journals 3 and 4, and use a crane to remove the crankshaft, as shown in Figure 2-139.
② Remove the upper bearing and mark the journal number at the time of removal on the surface of the bearing locating tongue, as shown in Figure 2-140.
Figure 2-138 Mark "U" and "front" or "rear" on the upper thrust bearing.
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