431-4143 Crankshaft GP CAT spare part

431-4143 Crankshaft GP CAT spare part Featured Image
  • 431-4143 Crankshaft GP CAT spare part
  • 431-4143 Crankshaft GP CAT spare part
  • 431-4143 Crankshaft GP CAT spare part

Short Description:

416-8754 CAT one-piece forged crankshaft assembly with induction hardened journals and internal oil galleries. It converts piston reciprocating motion into rotary power for overhaul of CAT C175 high-power diesel engines fitted on mining machines, marine main engines and generator sets.


Product Detail

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description

This crankshaft is the core rotating component of heavy-duty C13 diesel engine. It is forged from high-strength alloy steel in one piece with integrated counterweights. Main and rod journals are induction hardened and fillet rolled, with full internal oil galleries. Stress relief, MPI crack inspection, journal precision grinding and dynamic balance test are finished before delivery. C13 engines are widely installed on 345D, 349D excavators, 730 articulated trucks and 980 wheel loaders under cyclic impact load. The one-piece design eliminates loose counterweight bolt failure, it is a popular overhaul spare part for C13 powertrain.

Part number: 431-4143
Alternative name: Crankshaft GP
Fit engine: CAT C13 diesel engine
Fit machine: 345D, 349D excavator, 730 articulated truck, 980 series wheel loader, industrial generator set
Material: Forged alloy steel, induction hardened journals
Structure: One-piece integrated counterweights with timing drive flange
Process: Forging, stress relief, quenching & tempering, journal precision grinding, fillet rolling strengthening, oil passage polishing, crack inspection, dynamic balance calibration
Matching system: C13 heavy-duty construction diesel engine

Advantages

1. One-piece forged steel without separate counterweight bolts, removes risk of loose or falling counterweights.
2. Fillet rolling reduces stress concentration and improves fatigue fracture resistance.
3. Uniform hardened journal layer resists wear and pitting for mining impact duty.
4. Internal oil galleries deliver stable oil flow for main and connecting rod bearing lubrication.
5. Factory dynamic balance reduces vibration and protects damper, oil seals and timing gears.
6. Compatible with multiple C13 construction variants, good for fleets in Southeast Asia, Africa.

FAQ 

Q1: Can 431-4143 fit C11 engine directly?
A1: Not interchangeable. C11 and C13 differ in stroke, crank throw and flange. Verify engine serial number.
Q2: Can journals of this crank be reground after wear?
A2: Check remaining hardened layer depth first. Regrinding is allowed only if sufficient hard layer remains.
Q3: Must timing gear be replaced together with crankshaft?
A3: Inspect gear teeth. Replace if pitting, cracks or chipping are found.
Q4: How to store the crankshaft for long term?
A4: Coat journals, flange and sealing surfaces with anti-rust grease, support on multi-point fixture to avoid bending.

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