20R-6484 Crankshaft GP CAT spare part

20R-6484 Crankshaft GP CAT spare part Featured Image
  • 20R-6484 Crankshaft GP CAT spare part
  • 20R-6484 Crankshaft GP CAT spare part
  • 20R-6484 Crankshaft GP CAT spare part

Short Description:

1W-1662 CAT main bearing with 0.51 mm oversize, bimetallic thin-wall split main shell. It suits crankshafts with heavier journal grinding for CAT 3204 engine overhaul.


Product Detail

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description

This is Cat genuine reman crankshaft for C15 ACERT engine. It is forged from high-strength alloy steel, fully inspected, reground, fillet rolled, stress relieved and dynamically balanced during reman process. It is built for continuous shock loads in mining sites. Widely used on 740 articulated trucks, 374F, 385C excavators and SR4 generator sets, it is a popular reman rotating component for C15 ACERT overhaul.

Part number: 20R-6484
Alternative name: Crankshaft GP
Type: Cat Reman part
Fit engine: CAT C15 ACERT
Fit machine: 374F, 385C excavator, 735, 740 articulated mining truck, industrial high-power generator set
Material: Forged alloy steel, induction hardened journals
Structure: One-piece integrated counterweights with timing drive flange
Process: Forging, stress relief, fillet rolling, journal precision grinding, MPI crack inspection, dynamic balance calibration
Matching system: C15 ACERT heavy-duty diesel engine

Advantages

1. Built to Cat Reman specification with full crack inspection, reliable performance at lower cost than new crankshaft.
2. One-piece forged structure without bolt-on counterweights, eliminates loose counterweight failure risk.
3. Fillet rolling treatment reduces stress concentration and improves fatigue fracture resistance.
4. Full internal oil galleries deliver sufficient oil flow for main and rod bearing lubrication under heavy load.
5. Precision factory dynamic balance reduces vibration and protects damper, oil seals and gears.
6. Compatible with multiple C15 ACERT variants, easy stocking for mining fleets.

FAQ 

Q1: Can 20R-6484 fit older 3406E engine directly?
A1: Not interchangeable. C15 ACERT and 3406E differ in flange and timing design. Verify engine serial number.
Q2: Can the reman crank journals be reground again?
A2: Check remaining hardened layer first. Regrinding is allowed only if sufficient hard depth remains.
Q3: Is timing gear replacement required together with crankshaft?
A3: Inspect gear teeth. Replace gear 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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