For global construction contractors, quarry operators, municipal engineering fleets, and mining enterprises looking for reliable low-hour CAT heavy excavators with original body and paint, the 2021 CAT 336 crawler excavator stands out as a top-tier mid-to-large construction machine. Our in-stock Unit A31 is a genuine 2021-manufactured CAT 336 excavator featuring 2500 fully verified genuine working hours and 100% full original body plus original factory paint. With zero refurbishment, zero repainting, zero structural welding repair, and zero core parts replacement, this machine retains complete factory original condition and stable CAT original performance. Priced at only 86,000 USD, it delivers classic Caterpillar power stability, efficient hydraulic response, and long-term operational durability, perfectly adapting to earthwork construction, quarry rock breaking, foundation engineering, road renovation, and small-scale open-pit mining projects. As a high-cost-performance quasi-new CAT excavator, Unit A31 provides ultra-low investment risk and high residual value for global machinery buyers.

The CAT 336 is a benchmark 36-ton heavy-duty crawler excavator in Caterpillar’s classic product lineup, widely renowned worldwide for its stable power output, precise hydraulic control, low failure rate, and excellent fuel economy. Equipped with the original CAT C7.1 diesel engine and intelligent optimized hydraulic system, this model achieves a perfect balance of high productivity and low operating costs, making it the preferred core equipment for medium and large engineering projects. Unlike most second-hand CAT excavators on the market that suffer from repainted body, modified hours, repaired structure, and aging core components, our A31 2021 CAT 336 maintains pure original vehicle condition with transparent usage records. After 2500 hours of standardized running-in and regular maintenance, all core components are in the best stable working state, completely capable of long-term high-intensity construction operation.

Premium A31 Unit Condition: 2021 Manufacture, 2500 True Hours & Full Original Paint

The biggest competitive advantage of this A31 2021 CAT 336 excavator is its authentic quasi-new condition with full originality and verifiable true working hours. Manufactured in 2021, this machine is a mature and reliable mid-late model of the CAT 336 series, with complete factory assembly standards and original factory debugging parameters. The displayed 2500 working hours are 100% genuine and unmodified, with no hour meter tampering, data falsification, or usage record adjustment. Every hour of operation is traceable and reliable, allowing overseas buyers to purchase with absolute confidence.

During the entire service cycle, this CAT 336 unit only participated in standardized municipal and earthwork construction tasks, without long-term overloaded mining, violent rock breaking, harsh environment operation, or abusive construction behaviors. The equipment has always followed strict Caterpillar regular maintenance specifications, with timely replacement of engine oil, hydraulic oil, and filter elements, ensuring uniform and mild wear of all moving parts. There are no major overhaul records, core component disassembly, or key parts replacement throughout the service period, effectively avoiding hidden mechanical faults caused by irregular maintenance.

This unit features full original factory body and complete original paint finish, which is extremely rare in the second-hand CAT excavator market. The whole machine has no secondary spraying, partial touch-up painting, surface polishing, or scratch repair. The body frame, large boom, arm, bucket, chassis guard plates, and outer shell all retain the original factory paint texture, uniform color luster, and smooth surface without fading, peeling, or corrosion. The overall structure has no cutting, welding deformation, crack repair, or assembly gap change, maintaining 100% factory original structural integrity and mechanical toughness.

Classic CAT C7.1 Power System: Stable Output & High Efficiency

The 2021 CAT 336 A31 is equipped with an authentic CAT C7.1 original diesel engine, the golden power configuration for CAT 36-ton class excavators. This 6-cylinder high-efficiency engine delivers a rated power of 225kW (302HP), with strong low-speed high-torque reserve and stable continuous power output. It features excellent explosive power and power sustainability, easily coping with hard soil excavation, medium-hard rock breaking, bulk material loading, and large-area earthwork stacking. Even in long-term full-load cyclic operation and complex harsh construction environments, the engine maintains sufficient power response without power attenuation, stalling, or weak digging force.

Adopting Caterpillar’s exclusive high-pressure common rail fuel injection technology and optimized combustion system, the engine effectively improves fuel utilization efficiency and reduces comprehensive fuel consumption by nearly 15% compared with traditional old models, greatly lowering long-term fleet operating costs. The advanced exhaust treatment system meets international mainstream emission standards, with low exhaust pollution and strong environmental adaptability, supporting legal operation in urban construction zones and environmentally regulated areas.

Matched with the CAT C7.1 power unit is Caterpillar’s upgraded intelligent load-sensing hydraulic system. The high-flow main hydraulic pump and precise multi-way control valve realize adaptive flow distribution and dynamic pressure adjustment, making compound actions such as boom lifting, arm stretching, bucket digging, and 360-degree slewing smooth, sensitive, and highly coordinated. The hydraulic system features fast response speed, low pressure loss, and stable output, effectively shortening single-cycle operation time and significantly improving daily construction efficiency. It can perfectly meet the dual operation requirements of high-efficiency heavy-load excavation and precise fine leveling.

Reinforced Structural Design & Durable Original Chassis Performance

The 2021 CAT 336 adopts Caterpillar’s classic heavy-duty reinforced structural design, tailored for long-term high-intensity construction scenarios. The thickened high-strength steel boom and arm undergo professional fatigue resistance and impact resistance treatment, with excellent compression resistance and structural stability. It can withstand long-term vibration, impact, and heavy-load pressure during rock breaking and earthwork operation, effectively avoiding structural deformation, cracking, and fatigue damage, greatly extending the service life of working devices.

The whole machine retains the full original factory heavy-duty chassis system, including original thickened wear-resistant track shoes, reinforced track frames, heavy-duty support rollers, tension wheels, and high-torque travel motors. The CAT mining-grade chassis has ultra-high structural rigidity and terrain adaptability. After 2500 hours of scientific standardized running-in, the chassis walking performance is more stable and flexible, with low vibration, no track deviation, and no abnormal walking noise. It can stably adapt to muddy construction sites, rugged gravel roads, mountain slopes, and complex quarry terrain.

Equipped with a standard high-capacity original wear-resistant bucket, the machine has strong material penetration and loading capacity. The bucket parameters are precisely matched with the machine’s hydraulic output and digging force, ensuring efficient and stable material scooping and unloading. The original bucket has no wear deformation or structural damage, maintaining long-term stable working efficiency and avoiding efficiency attenuation caused by modified or mismatched accessories.

Humanized Cab & Intelligent Practical Configuration

The 2021 CAT 336 features a comfortable and safe enclosed silent cab, focusing on long-shift operation comfort and construction safety. The multi-layer sound insulation and dustproof structure effectively reduce internal operating noise and isolate external construction dust, creating a quiet and clean working environment for drivers. The panoramic wide-view window provides an ultra-wide field of view, eliminating construction blind spots and improving overall operation safety.

The cab is equipped with humanized configurations including an intelligent high-definition display screen, flexible integrated operating handles, adjustable deluxe seat, and multi-functional charging interfaces. The optimized operating system reduces operating resistance and effectively relieves driver fatigue during long-term continuous work. The intelligent monitoring system can real-time display equipment operating data, fuel consumption, and fault information, facilitating daily equipment inspection and maintenance management.

In terms of daily maintenance, the machine adopts a convenient centralized maintenance design. Core maintenance parts such as engine oil filters, fuel filters, and hydraulic detection ports are centrally arranged, realizing quick inspection and replacement. This design greatly saves daily maintenance time and labor costs, reduces equipment downtime, and improves fleet operation attendance rate.

Diversified Application Scenarios & High Investment Value

The 2021 low-hour full-original CAT 336 excavator (Unit A31) is widely applicable to large-scale earthwork filling and foundation treatment, quarry rock mining and crushing, municipal road renovation and urban infrastructure construction, river dredging and slope reinforcement, highway and railway auxiliary engineering, and small-scale open-pit mine material loading. It balances heavy-load construction performance and precise operation capability, adapting to various complex working scenarios and meeting the diversified construction needs of engineering fleets.

For medium and large engineering fleets, this original low-hour CAT 336 can effectively supplement heavy-duty equipment capacity, improve overall construction efficiency, and shorten project cycles. The stable and reliable performance ensures high equipment attendance rate, avoiding project shutdown losses caused by equipment faults. For individual contractors and machinery investors, the 86,000 USD ultra-cost-effective pricing greatly reduces investment threshold and risk. With full original paint, genuine hours, and high residual value retention rate, the machine is suitable for long-term self-operation or equipment leasing, bringing stable and considerable economic returns.

Outstanding Cost Performance & Core Market Advantages

Priced at only 86,000 USD, the 2021 full-original CAT 336 with 2500 genuine hours shows unparalleled cost performance in the global 36-ton used excavator market. As a classic reliable CAT model, it has far higher market recognition and user reputation than ordinary brand excavators of the same tonnage. Compared with brand-new CAT 336 excavators with high premiums and long delivery cycles, this quasi-new unit avoids huge new equipment depreciation losses and supports immediate delivery and quick put-into-operation.

Compared with refurbished CAT excavators with repainted body, modified hours, and repaired structure on the market, our A31 unit has absolute advantages: 100% genuine 2500 unmodified hours, full original factory body and paint, zero overhaul records, and zero hidden structural faults. After scientific running-in, the core components are in the optimal stable working period, with low failure rate and long remaining service life. Supported by Caterpillar’s global complete spare parts supply system and perfect after-sales service network, later maintenance is convenient and low-cost, eliminating all operational worries for overseas users.

Strict Pre-Delivery Inspection & Global One-Stop Service

To ensure 100% delivery quality, our professional technical team conducts a comprehensive full-system inspection and functional debugging for the A31 2021 CAT 336 before shipment. The inspection items include genuine working hour verification, engine power and fuel consumption calibration, hydraulic system pressure and flow detection, chassis walking performance testing, original paint integrity inspection, structural safety detection, and full-machine operational test run. We strictly screen every detail to ensure the equipment meets international heavy machinery operation standards.

We provide full-process global one-stop trading services for overseas customers, including on-site physical inspection, real-machine test operation, remote video real-time verification, professional equipment debugging, and global door-to-door logistics transportation. We support flexible payment methods and exclusive batch procurement discounts, and provide long-term technical guidance and after-sales maintenance support to ensure zero-worry operation of overseas engineering projects.

Product Summary

The 2021 CAT 336 Crawler Excavator (Unit A31) is a high-quality low-hour quasi-new heavy-duty engineering equipment with outstanding market competitiveness. It features 2021 original factory production, 2500 verified genuine working hours, full original body, and complete original factory paint, with no refurbishment, repainting, structural welding repair, or hour tampering. Equipped with classic CAT C7.1 high-efficiency power system, stable intelligent hydraulic configuration, and durable reinforced structure, it delivers strong digging performance and all-scenario adaptability. Priced at 86,000 USD with ultra-low investment risk and high residual value, this machine is the ideal cost-effective choice for global engineering fleets and contractors to purchase high-quality 36-ton class CAT excavators.

If you are searching for genuine full-original, low-hour, zero-fault CAT 336 excavators, the A31 2021 CAT 336 is your best procurement option. Welcome to contact us for real machine photos, detailed parameter lists, test operation videos, and exclusive preferential policies.