468-5120 Crankshaft AS CAT spare part

468-5120 Crankshaft AS CAT spare part Featured Image
  • 468-5120 Crankshaft AS CAT spare part
  • 468-5120 Crankshaft AS CAT spare part
  • 468-5120 Crankshaft AS CAT spare part

Short Description:

389-5196 CAT side bearing is bimetallic thin-wall split main bearing shell, matched with 389-5193 thrust bearing. It carries radial crankshaft load for overhaul of CAT C4.4, 3054C, 3054E engines.


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description

This crankshaft is the core drive assembly for heavy-duty C18 diesel engine. It is forged from high-strength alloy steel with removable bolt-on counterweights. The journals, flange and gear are precision machined integrally. It goes through quenching & tempering, journal grinding, oil passage polishing, stress relief and dynamic balance inspection. It withstands continuous heavy impact in quarry and mining sites. Damaged counterweights can be replaced separately instead of the whole crankshaft. Widely used for C18 power assemblies of large mining excavators, track dozers, generator sets and mining trucks.

Part number: 468-5120
Alternative name: Crankshaft AS
Fit engine: CAT C18
Fit machine: 385C, 390D, 390F excavator, D9T dozer, 770, 772 mining truck, SR4B high-power generator set
Material: Forged alloy steel
Structure: Bolt-on split counterweights, integrated 66-tooth timing gear
Process: Forging, stress relief, quenching & tempering, journal precision grinding, oil passage polishing, crack inspection, dynamic balance calibration
Matching system: C18 heavy electronic diesel engine

Advantages

1. Split bolt-on counterweight design, single damaged counterweight replaceable to reduce overhaul cost.
2. High-strength forged alloy steel with excellent impact, torsion and fatigue resistance for continuous heavy mining load.
3. Integrally machined 66-tooth timing gear delivers high precision and stable timing drive to reduce noise.
4. Reinforced fillet on journal reduces stress concentration and crank fracture risk.
5. Internal oil galleries provide sufficient oil supply to maintain bearing lubrication under long heavy load.
6. Factory dynamic balance calibration suppresses vibration and protects damper, oil seals and gears.

FAQ 

Q1: Can 468-5120 interchange with 468-5119?
A1: Not interchangeable. They differ in flange, gear and counterweight gravity center for different C18 versions.
Q2: Can counterweight with dents be reused?
A2: Dents change mass and gravity distribution. Repair is not allowed, replace the counterweight directly.
Q3: Is dynamic balance test mandatory after counterweight replacement?
A3: Yes. Even same part replacement may bring assembly error and affect balance.
Q4: How to store the crankshaft for long term?
A4: Coat journals, gears and counterweight mating surfaces with anti-rust grease, support on multi-point fixture to avoid bending.

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