299-5204 PISTON AS is a Caterpillar 170mm long bore engine piston with a 14:1 compression ratio, manufactured from alloy copper and alloy steel. It is designed to work within heavy-duty reciprocating diesel engines, converting combustion pressure into mechanical movement through the connecting rod and crankshaft system.
| Item | Specification |
|---|---|
| Product Name | PISTON AS / 170mm Long Bore Engine Piston |
| Part Number | 299-5204 |
| Brand | Caterpillar (CAT) |
| Machine Model | CAT 777F |
| Weight | 8.6 kg |
| Material | Alloy Copper / Alloy Steel |
| Condition | Brand New – Genuine |
| Warranty | 6 Months |
| Packaging | Standard Export Carton |
| Availability | Generally in stock |
| Origin | China |
The product information provided for this listing is:
However, Caterpillar’s current official product page does not list 777F among the compatible models for 299-5204. The official database lists applications including 777, 777B, 777C, 777D, 776D, 784C, 854G, 992G, 994D, D11N, D11R, as well as various 3500-series engine and power-module applications.
Because engine configuration and machine serial number can affect compatibility, please provide the machine serial number (PIN), engine model, or original part number before ordering for a 777F application.
The 299-5204 piston is suitable for heavy equipment and engine applications operating in demanding environments, including:
As an engine internal component, it is particularly suitable for engine overhaul, scheduled maintenance, piston replacement, and repair of heavy-duty diesel power systems.
YLCM specializes in supplying construction and mining machinery parts to customers worldwide, providing professional sourcing, part-number verification, and international delivery solutions.
We provide:
Our product range covers engine pistons, piston rings, cylinder liners, crankshafts, bearings, connecting rods, fuel system components, hydraulic parts, drivetrain components, filters, seals, and other construction and mining machinery parts.
For engine overhaul projects, YLCM can also assist customers with sourcing multiple related engine components from one supplier.
Each piston is professionally protected according to its size, quantity, and transportation requirements.
Packaging options include:
For international transportation, YLCM can arrange sea freight, railway transportation, land transportation, and multimodal logistics solutions according to the destination and customer requirements.
Q1: What is 299-5204?
A: 299-5204 is a 170mm Long Bore Engine Piston manufactured for Caterpillar engine applications. Caterpillar specifies a 170 mm bore and 14:1 compression ratio.
Q2: What material is 299-5204 made from?
A: Caterpillar specifies Alloy Copper and Alloy Steel as the materials for this piston.
Q3: What is the bore size of this piston?
A: The piston is designed for a 170 mm bore application.
Q4: Is 299-5204 compatible with CAT 777F?
A: 777F is the machine model provided for this product listing, but Cat’s current official compatibility database does not list 777F for 299-5204. We recommend providing the machine PIN or engine serial number for verification before ordering.
Q5: Which engines use 299-5204?
A: Cat’s official database lists several 3500-series applications, including 3508B, 3512B, 3516B and 3516E, along with various equipment applications.
Q6: What is the compression ratio?
A: Caterpillar identifies 299-5204 as a piston for a 170 mm bore with a 14:1 compression ratio.
Q7: How can I confirm compatibility?
A: Please send your machine model, machine serial number (PIN), engine model, engine serial number, or original part number. Our technical team can verify the correct application before shipment.
Q8: Can YLCM supply related engine parts?
A: Yes. We supply piston rings, cylinder liners, bearings, connecting rods, crankshafts, engine assemblies, and other engine components for construction and mining equipment.
Looking for 299-5204 PISTON AS for CAT 777F?
Contact YLCM to receive:
Please send us the part number, required quantity, machine model, engine model, and destination. If possible, include the machine PIN or engine serial number so our technical team can verify compatibility before shipment.
The 299-5204 PISTON AS is a Caterpillar 170mm long bore engine piston with a 14:1 compression ratio, manufactured from alloy copper and alloy steel. It is designed to work within heavy-duty reciprocating diesel engines, converting combustion pressure into mechanical movement through the connecting rod and crankshaft system. With its application-specific design and durable material construction, it is suitable for demanding engine overhaul and maintenance work in mining, quarry, construction, and heavy earthmoving equipment.
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