C2.4 Complete Engine Assembly for CAT 305.5E Mini Excavator
Cat C2.4 complete engine assembly - the 2.4 litre four-cylinder diesel fitted to the 305.5E2 CR and 305.5E mini excavators. Bore 87 mm, stroke 102.4 mm, 2.4 L / 146 in³; rated 32.9 kW / 44.1 hp at 2,200 rpm net in the 305.5E2 CR. Engine arrangement 457-1444 / 416-6096.
Key Features
- Cat C2.4 complete diesel engine assembly for 305.5E and 305.5E2 CR mini excavators
- 2.4 litre, four-cylinder, in-line, water-cooled four-stroke diesel
- Bore 87 mm x stroke 102.4 mm; displacement 2.4 L / 146 in³
- Rated 32.9 kW / 44.1 hp net at 2,200 rpm in the 305.5E2 CR installation
- Engine arrangement 457-1444 and 416-6096 (ENGINE AR-PRIMARY)
- Backed by full engine and machine build verification before dispatch
Product Specifications
| Item |
Specification |
| Product Name |
Complete Engine Assembly (Diesel) |
| Engine Model |
Cat C2.4 also quoted as C2.4 DI |
| Configuration |
Four-cylinder, in-line, water-cooled, four-stroke |
| Displacement |
2.4 L / 146 in³ |
| Bore x Stroke |
87 mm x 102.4 mm (3.4 in x 4 in) |
| Rated Net Power |
32.9 kW / 44.1 hp at 2,200 rpm (ISO 9249 / EEC 80/1269) in the 305.5E2 CR |
| Gross Power |
34.1 kW / 45.7 hp (ISO 14396) in the 305.5E2 CR |
| Emissions (as installed) |
U.S. EPA Tier 4 Final / EU Stage IIIA in the 305.5E2 CR |
| Engine Arrangement |
457-1444; 416-6096 (both listed as ENGINE AR-PRIMARY on the C2.4) |
| Supply Options |
New and used-original grades supplied - state which you need |
| Condition |
New / Used Original |
| Warranty |
12 Months (grade dependent) |
| Packaging |
Ports capped and plugged, braced on timber pallet, sealed for sea freight |
Cross Compatibility Reference
| Category |
Replaceable Part Numbers & Compatible Models |
| Engine Models |
Cat C2.4; C2.4 DI |
| Engine Arrangement Numbers |
457-1444 (ENGINE AR-PRIMARY, 305.5E MX5 series); 416-6096 (ENGINE AR-PRIMARY, C2.4); 378-3252 (ENGINE AR-PRIMARY, C2.4 machine arrangement SEBP7634) |
| Numbers Quoted by Sellers - Verify |
320-3421; 271-5893; 308-1859 - these appear in marketplace listings for the C2.4 but are not confirmed as ENGINE AR numbers on the 305.5E2 build |
| Compatible Machines |
Cat 305.5E mini excavator (MX5 series); Cat 305.5E2 CR mini hydraulic excavator; Cat 305E CR; Cat 304E CR; Cat 303.5E CR - the E-series CR range uses the C2.4 |
| Caution - Older 305.5 CR |
The earlier 305.5 CR (C-series) is not a C2.4 machine - its service documentation and filter catalogues list a Mitsubishi engine for that build (sources name the S4Q2 and the 4M40 series). This assembly does not fit it |
| Caution - The Current 305.5 |
The current 305.5 is listed by CAT with the Cat C2.2 - 2.2 L, bore 84 mm, stroke 100 mm, 34.1 kW / 43.7 hp at 2,400 rpm - a different block from this C2.4 |
Related Products
Product Core Advantages
"305.5" is the most dangerous three-character search on this part, because the machine has carried three different engines in three different generations. The 305.5E and 305.5E2 CR use the Cat C2.4 - the 2.4 litre, 87 mm by 102.4 mm four-cylinder covered by this listing, rated 32.9 kW / 44.1 hp net at 2,200 rpm in the 305.5E2 CR.
- C2.4 (305.5E / 305.5E2) separated from the Mitsubishi 305.5 CR and the C2.2 305.5
- Engine arrangement number and machine serial prefix confirmed before dispatch
- Ratings difference inside the C2.4 family disclosed, not left to the buyer
- Seller-quoted numbers flagged as unverified rather than repeated as fact
- Ports capped and pallet-braced for sea freight
Product Images
Frequently Asked Questions
What is this part?
The Cat C2.4 complete engine assembly, a 2.4 litre four-cylinder water-cooled diesel.
Which machines does it fit?
Cat 305.5E and 305.5E2 CR mini excavators, and the other E-series CR models built around the C2.4.
Does every 305.5 use this engine?
No - the older 305.5 CR uses a Mitsubishi engine and the current 305.5 uses the Cat C2.2.
What is the engine arrangement number?
This build carries 457-1444 and 416-6096 as ENGINE AR-PRIMARY numbers.
Is it the turbocharged C2.4?
Cat lists the 305.5E2 engine as Cat C2.4 and the 306.5 as Cat C2.4 Turbo.
How do I confirm the right engine?
Send the machine serial prefix and a photo of the engine plate.
