352-1225 Crankshaft GP CAT spare part

352-1225 Crankshaft GP CAT spare part Featured Image
  • 352-1225 Crankshaft GP CAT spare part
  • 352-1225 Crankshaft GP CAT spare part
  • 352-1225 Crankshaft GP CAT spare part

Short Description:

390-3066 CAT standard main bearing set for C4.4 engine includes side main shells and integrated thrust shell. Bimetallic thin-wall bearings supply radial support and axial limit for CAT C4.4, 3054C, 3054E engine overhaul.


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description

This crankshaft is the core drive component of 12-cylinder high-power 3512C diesel engine. It is forged from high-strength alloy steel blank with bolt-on removable counterweights. Main and rod journals are surface hardened with internal oil galleries. MPI crack inspection, stress relief and dynamic balance are finished before delivery. Widely applied for marine auxiliary engines, mining crushers and high-power generator sets under continuous heavy load. Damaged counterweights can be replaced separately instead of the whole crankshaft for overhaul cost saving.

Part number: 352-1225
Alternative name: Crankshaft GP
Fit engine: CAT 3512C
Fit machine: Mining crusher, drilling rig power unit, marine auxiliary engine, SR4 high-power generator set, mining water pump unit
Material: Forged alloy steel
Structure: Bolt-on split counterweights, integrated timing gear
Process: Forging, stress relief, quenching & tempering, journal precision grinding, fillet strengthening, oil passage polishing, crack inspection, dynamic balance calibration
Matching system: 3512C heavy industrial & marine diesel engine

Advantages

1. Bolt-on split counterweight design allows single counterweight replacement and cuts overhaul cost.
2. High-strength forged alloy steel provides excellent torsion and fatigue resistance for long continuous heavy load.
3. Reinforced journal fillet reduces stress concentration and crank fracture risk.
4. Internal through oil galleries deliver stable oil supply for bearing lubrication under all working conditions.
5. Factory dynamic balance calibration suppresses vibration and protects damper, oil seals and gears.
6. Integrally machined timing gear with high tooth precision keeps valve and fuel injection timing synchronized.

FAQ 

Q1: Can 352-1225 fit 3512B engine directly?
A1: Not interchangeable. 3512B and 3512C differ in gear, counterweight and flange. Verify engine serial number.
Q2: Can dented counterweight be repaired and reused?
A2: No. Dents change mass and gravity distribution. It will cause unbalance and must be replaced.
Q3: Which spare parts should be renewed with crankshaft?
A3: Main bearings, connecting rod bearings, thrust washers, front/rear oil seals, main bearing bolts and counterweight bolts are recommended.
Q4: How to store the crankshaft for long term?
A4: Coat journals, gears and mating surfaces with anti-rust grease, support on multi-point fixture to avoid bending.

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