Detail Information

Part No:	7W2221 8N7810 8N1233	Brand:	CAT CTP
Quality:	High Quality	Applicable Models:	3508 3512 3516
Condition:	New	Warranty:	Discuss
Packing:	Neutral/Original	Shipping:	Sea Air Express
Highlight:	8N1233 Engine Piston Rings , CAT 3508 Engine Parts , Excavator Engine Piston Rings 7W2221

Product Description

For 7W2221 8N7810 8N1233 engine piston rings CAT 3512 3508 3516 engine parts

Specification

Product Name:	Piston Ring	Application:	Industrial Oil Field Marine Engine
Machine Model:	3508 3512 3516	Part Number:	8N-1233 8N-7810 7W- 2221
Lead Time:	Check with sales	Part Type:	New replacement

Description

These piston rings are precision-engineered replacement parts specifically designed for CAT heavy-duty engines, including the iconic 3508, 3512, and 3516 models. Covering the key part numbers 7W2221, 8N7810, and 8N1233, they serve as critical components of the engine’s combustion system, mounted on the piston to form a tight seal between the piston and cylinder wall.

Crafted in strict adherence to CAT’s original equipment manufacturing standards, the piston rings feature a multi-layered structure tailored to the rigorous operating conditions of CAT’s large diesel engines—commonly used in mining, construction, power generation, and marine propulsion. Each ring variant is optimized for its specific position (compression ring, oil control ring, etc.) within the piston assembly, ensuring compatibility with the engine’s bore size, piston groove dimensions, and operating parameters. The product undergoes rigorous dimensional inspection and material testing to match the fit, form, and function of the original parts, eliminating issues such as improper sealing or premature wear caused by mismatched components.

Advantage

OEM-Grade Compatibility & Fitment: Manufactured to the exact specifications of CAT’s 7W2221, 8N7810, and 8N1233 part numbers, these piston rings ensure seamless installation without the need for modifications. They perfectly align with the piston grooves and cylinder bores of 3508/3512/3516 engines, reducing downtime during maintenance and avoiding assembly errors that could damage engine components.
Superior Material Durability: Constructed from high-strength alloy steels and reinforced with advanced coatings (such as chromium plating or molybdenum spraying), the piston rings exhibit exceptional resistance to high temperatures, pressure, and abrasive wear. This material composition prevents ring deformation under the extreme combustion pressures of CAT’s large engines, extending the service life by 30% or more compared to generic aftermarket rings.
Optimized Sealing Performance: The precision-machined ring faces and optimized cross-sectional design create an airtight seal that minimizes blow-by (the leakage of unburned fuel and combustion gases into the crankcase). This not only maintains maximum combustion efficiency but also reduces oil contamination, lowering the frequency of oil changes and related maintenance costs.
Cost-Effective Reliability: While matching OEM quality, these piston rings offer a more competitive price point than genuine CAT parts without compromising performance. Their long service life and resistance to premature failure reduce unplanned downtime—critical for heavy-industry applications where engine outages can result in significant operational losses.

Performance

Combustion Efficiency Enhancement: By minimizing blow-by (typically reducing it to less than 2% of total combustion gases, meeting CAT’s strict standards), the piston rings ensure that more fuel is fully burned, boosting the engine’s power output and torque. For CAT 3516 engines, this can translate to a 5-8% improvement in fuel efficiency under full load, a key advantage for high-consumption applications.
Exceptional Temperature & Pressure Resistance: Engineered to withstand the extreme operating conditions of CAT’s 3508/3512/3508 engines—including cylinder temperatures exceeding 1,800°F (980°C) and combustion pressures up to 2,500 psi—the piston rings maintain their structural integrity and sealing ability without warping or cracking, even during prolonged heavy-load operation.
Oil Control Precision: The oil control rings feature a specialized scraper design that effectively removes excess oil from the cylinder walls, returning it to the crankcase while preventing oil from entering the combustion chamber. This reduces oil consumption by up to 25% compared to worn or low-quality rings, eliminating oil smoke and reducing carbon deposits on spark plugs or injectors.
Long-Term Operational Stability: Under standard maintenance conditions, these piston rings achieve a service life of 10,000+ operating hours for CAT 3508/3512 engines (and 8,000+ hours for the high-output 3516 model), matching or exceeding the lifespan of genuine CAT piston rings. This stability ensures consistent engine performance across extended service intervals, ideal for remote or high-demand work environments.

FAQ

1. Why choose us?
(1) Our parts are OEM quality.
(2) High quality,the best price from factory.
(3) Our company is an integrated supplier of construction machinery parts.
(4) Delivery on time.
(5) Accept small orders.
(6) Find professional factory customized products for customers.
(7) A service team with nearly 28 years of professional experience.
(8) Our company is the wholesaler which is have enough stock.

2. What kind of parts do you supply?
We supply engine parts, hydraulic parts, electrical parts, and so on.

3. What services can we provide?
Accepted delivery terms: EXW
Accepted payment currencies: USD, RMB;
Accepted Payment Type: T/T
language: English

4. How long is the delivery time?
Usually, it takes 2-6 working days for in-stock items, customized products need to be arranged as needed

5. What kind of packaging do you provide?
Neutral packaging or TE brand packaging

About us

Tag:

Place of Origin:	China
Brand Name:	CAT
Model Number:	3508 3512 3516

Minimum Order Quantity:	1 SET
Price:	USA$ 45~75
Packaging Details:	Neutral/Original
Delivery Time:	3~15 work days
Payment Terms:	T/T,Western Union
Supply Ability:	500 set,15 work days

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