This article describes the disassembly of the crankshaft of a Caterpillar C3.4B engine for construction machinery
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Removing steps
begin:
A. Remove the engine oil suction pipe. For the correct steps, see Disassembly and Assembly, “Engine Oil pan-Removing and Installation”.
B. Balancer, remove, if necessary. For the correct steps, see Disassembly and Assembly, “Balancer-Removing”. C. Remove the flywheel housing. See Disassembly and Assembly, “flywheel housing-Removing and installing” for the correct steps.
D. Remove the front shell. For the correct steps, see Disassembly and assembly, “Housing (front) -Disassembly”.
E . If necessary, remove the power output unit to drive. See Disassembly and Assembly, “Power Output Drive-Remove and Install” for the correct steps.
F. Remove the cylinder head, if necessary. See Disassembly and Assembly, “Cylinder head-Remove” for the correct procedures.
G. If necessary, remove the piston and link. See Disassembly and Assembly, “Pistons and Linkage-Removing” for the correct steps.
H. Remove the main bearing cover. See Disassembly and Assembly, “Crankshaft Main Bearing-Removing and Installation” for the correct steps.
pay attention to
Keep all the parts clean without impurities.
Impurities can cause rapid wear and shorten component life.
1. The engine shall be mounted inverted on a suitable bench.
2. If the cylinder head, piston, and connecting rod are not removed, remove the connecting rod bearing. For the correct steps, see Disassembly and Assembly, “Connecting rod Bearing-Removing”.
3. Connect the tool (A) and the appropriate lifting equipment to the crankshaft (2). Lift the crankshaft out of the cylinder block. The crankshaft weighs approximately 35 kg (77 Ib).
Note: Do not damage any finishing surface on the crankshaft. After removing the crankshaft from the engine, the crankshaft must be supported on the proper bench to avoid damage to the crankshaft timing.
4. Remove the main bearing bearing from the cylinder block. See Disassembly and Assembly, “Crankshaft Main Bearing-Removing and Installation” for the correct steps.
Note: The main bearing shaft has a groove and one oil bore.
5. If necessary, remove the crankshaft timing tooth ring (1). For the correct steps, see Disassembly and Assembly, “Crankshaft timing tooth ring-Removing and installing.”
pay attention to
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