Place of Origin:
China
Brand Name:
CAT
Model Number:
C6.4
Complete six-cylinder C6.4 ACERT engine assembly quoted for CAT 320D and 323D excavator applications. Published parameters include a 102 mm × 130 mm bore and stroke, 6.4 L displacement, 17.5:1 compression ratio, turbocharging with air-to-air aftercooling, MEUI electronic unit injectors managed by an ADEM A4 module, and 103 kW / 138 hp net at 1800 rpm. Market listings carry 272-4683 as the core arrangement number.
| Item | Specification |
|---|---|
| Product Name | Complete Engine Assembly |
| Series | C6.4 with ACERT technology |
| Configuration | Inline six, four stroke, water cooled, turbocharged with air-to-air aftercooling |
| Displacement | 6.4 L, 389 cu in |
| Bore and Stroke | 102 mm × 130 mm |
| Compression Ratio | 17.5:1 |
| Fuel System | MEUI electronic unit injectors with an ADEM A4 electronic control module |
| Output | 103 kW / 138 hp net; higher rating published at 117 kW / 157 hp; both at 1800 rpm; peak torque 608 Nm |
| Rotation | Counterclockwise viewed from the flywheel end |
| Applications | Quoted for CAT 320D, 320D L, 320D FM, 320D GC, 323D and 323D L |
| Shipping | One supplier's crated figure is 700 kg in a 122 × 92.5 × 126.5 cm crate |
| Condition | New, rebuilt and used assemblies are all traded |
| Category | Replaceable Part Numbers & Compatible Models |
|---|---|
| Core Arrangement Number | 272-4683, carried in market listings and described by one supplier as the exchange core arrangement for the 320D, 320D L, 320D FM and 320D GC, with 272-4682 and 272-4685 quoted alongside |
| Related Arrangement | 305-4777, carried in the same market headings as 272-4683 |
| Block Castings | 296-4648 and 294-1725, quoted for the cylinder block of this engine |
| Fuel Injection Pump | 326-4635, listed for the 320D build |
| Injector | 571-0939 given for the 320D and 323D; 326-4700 widely listed for this engine with 10R-7675 as the exchange number and 32F61-00062 quoted alongside |
| Harness and Sensors | 306-8610 external engine harness for this machine group; 296-4617 harness listed for the 320D; sensor listed as 258-0883 |
| Fuel Manifold | 438-3416 with 32F61-50900, listed for this engine |
272-4683 states which exchange core applies to the machine, not what was renewed inside it. Two units under one number can differ in scope.
The published parameter set lists MEUI unit injectors under an ADEM A4 module, while several market entries describe the engine as common rail. The two descriptions lead to different injector and pump orders.
Injector numbers for the six-cylinder relative, including 320-0690, 320-0677, 2645A749 and 2645A746, are listed beside these ones although it is a separate engine.
The next designation in this machine class is a different engine, so its arrangements and injectors are not interchangeable with this one.
Units mostly sit between 3000 and 6000 per piece, rebuilt entries around 5141, low entries from 1451 to 1980, alongside one set printed at 10 for 10 pieces.
Quoted for CAT in the 320D, 320D L, 320D FM and 320D GC, and also in the 323D and 323D L, which are the machine versions carried against this core arrangement.
The bore, stroke and 6.4 L capacity carry over, while the later engine adds electronic control: MEUI unit injectors worked by an ADEM A4 module rather than a mechanical governor, so the pump and injector numbers differ.
Two references appear for this engine in the market, 571-0939 for the 320D and 323D and 326-4700 with 10R-7675 as its exchange number, so the identification on the fitted injectors decides.
The published parameter set lists MEUI electronic unit injectors and an ADEM A4 module, so pump and injector numbers are ordered on that basis.
272-4683 identifies the core the machine is entitled to, not what was renewed inside it.
The machine serial, the engine serial and photographs of both plates.
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