Upper Part Of The Seat (Armless)
Верхняя часть сиденья (без подлокотников)
Parte superior del asiento (sin brazos)
The OEM reference 801974889 identifies a premium upper seat structure (armless version) engineered specifically for XCMG hydraulic excavator operator seats. This genuine cab component forms the essential backrest and lumbar support section, providing superior ergonomic comfort and long-term durability. Designed with high-density foam, wear-resistant upholstery, and a robust steel frame, the 801974889 upper seat part delivers exceptional resilience, consistent support, and reliable performance under continuous heavy-duty operation.
As a critical element of the operator seat assembly, this armless upper part effectively reduces driver fatigue by maintaining proper spinal alignment and distributing pressure evenly across the back area. The part number 801974889 is fully interchangeable with original XCMG factory specifications, guaranteeing a perfect fit for a wide range of excavator models. Every unit undergoes rigorous dimensional inspection, foam density testing, and abrasion validation to meet ISO 9001 and CE safety standards, ensuring that your machine provides factory‑level comfort and support.
Whether you are refurbishing a worn-out seat or upgrading to a more comfortable configuration, choosing the genuine 801974889 upper seat component eliminates the risk of premature sagging or upholstery tearing associated with aftermarket imitations. The advanced cold-cure foam formulation provides superior resilience and shape retention, while the specially engineered fabric cover offers breathability and resistance to oils, sweat, and UV exposure. This combination of robust materials and ergonomic design makes the 801974889 the definitive choice for fleet managers and owner‑operators who demand maximum operator comfort, productivity, and lowest total cost of ownership.
| Parameter | Specification |
|---|---|
| OEM Part Number | 801974889 |
| Product Name | Upper Part Of The Seat (Armless) / Backrest Assembly |
| Brand / Manufacturer | XCMG (Genuine Original Equipment) |
| Compatible Excavator Models | XCMG XE215, XE270, XE335, XE370, XE400, XE490, XE700, XE900 series |
| Frame Material | High-strength steel, powder-coated |
| Foam Type | Cold-cure polyurethane, high-resilience (HR) |
| Foam Density | 62 kg/m³ ± 5% |
| Upholstery Material | PVC-coated polyester fabric, anti-slip texture |
| Overall Height (backrest) | 620 mm |
| Overall Width (backrest) | 480 mm |
| Thickness (foam + frame) | 85 mm |
| Lumbar Support Adjustment | Mechanical, 4-position (integrated) |
| Mounting Type | 4-bolt pattern (M8 x 25 mm) on steel backplate |
| Color (standard) | Charcoal black / XCMG grey (optional) |
| Weight (unit) | 6.8 kg ± 0.2 kg |
| Durability Test (foam fatigue) | ≥ 500,000 cycles @ 100 kg load |
The upper seat component bearing the OEM code 801974889 represents the culmination of XCMG’s decades of ergonomic seating research. Unlike conventional flat backrests, this armless upper part features a contoured lumbar support zone and a slightly curved thoracic region that naturally follows the spine’s curvature. This intelligent design reduces pressure on the lower back and promotes healthy posture, effectively minimizing operator fatigue during prolonged shifts.
Manufactured from high-strength steel tubing with a corrosion-resistant powder coating, the 801974889 frame provides a rigid foundation that maintains its shape even under heavy loads and vibration. The cold-cure polyurethane foam is poured directly onto the frame, ensuring a perfect bond and eliminating the risk of delamination. Independent lab tests show that the genuine XCMG upper seat outperforms generic alternatives by over 200% in indentation load deflection (ILD) retention, directly translating to consistent comfort and fewer seat replacements.
The upholstery material is a heavy-duty PVC-coated polyester fabric with a micro-porous surface that allows moisture vapor to escape, keeping the operator dry and comfortable. The fabric is treated with an anti-bacterial and anti-fungal agent, as well as UV stabilizers to prevent fading and cracking under prolonged sun exposure. Stitching is reinforced with high-tenacity nylon thread, and all seams are double-stitched for maximum tear resistance.
The part number 801974889 is expressly designed for XCMG’s current-generation hydraulic excavator seats, including models XE215, XE270, XE335, XE370, XE400, XE490, XE700, and XE900. It directly supersedes earlier revisions 801974888 and 803164312, offering improved lumbar support and a 10% thicker foam layer for enhanced comfort. For fleet operators, this single part number standardizes inventory across multiple model sizes, reducing stock complexity and the risk of mis-ordering.
Installation of the 801974889 upper seat is straightforward: after removing the seat from the cab, the old backrest is detached by unscrewing four M8 bolts. The new unit is positioned with the mounting holes aligned, and bolts are torqued to 25 N·m. No special tools are required, and the entire procedure can be completed in under 20 minutes, minimizing machine downtime.
In rigorous field trials across Australian mines, Canadian oil sands, and African construction sites, the 801974889 upper seat demonstrated an average service life exceeding 8,000 hours without significant foam degradation or upholstery wear – a 30% improvement over the previous design. The key to this longevity lies in the high-resilience foam formulation, which recovers its original shape after each compression cycle, maintaining consistent support over time. Even under extreme temperature variations from -40°C to +70°C, the foam retains its flexibility and the fabric remains tear-resistant.
The powder-coated steel frame resists corrosion and impact damage, while the double-stitched seams prevent unraveling even under heavy lateral loads. The armless design provides greater freedom of movement, especially for operators who need to access side controls frequently, making the 801974889 an ideal choice for both general excavation and precision grading applications.
To maximize the return on your genuine XCMG upper seat component, adhere to a proactive maintenance schedule. Every 500 service hours, clean the upholstery with a mild soap solution and a soft brush – avoid harsh chemical cleaners that can degrade the PVC coating. Inspect the mounting bolts for tightness and check for any signs of foam compression or fabric abrasion.
When storing spare units for an extended period, keep the 801974889 in a cool, dry place, away from direct sunlight and ozone sources. Avoid stacking heavy objects on the foam surface, as prolonged compression can reduce its resilience. Before installation, verify that the seat base mounting holes are clean and free of rust, ensuring a secure and stable fit.
For operators working in particularly dusty or muddy environments, we recommend using a seat cover to protect the upholstery from abrasive particles. This simple practice has been shown to extend the life of the upper seat by up to 25%, solidifying the 801974889 as the most cost-effective seating investment available today.
Every 801974889 upper seat part exits XCMG’s state-of-the-art production facility with a full inspection report, including foam density, ILD values, and frame dimensional accuracy. The manufacturing process is governed by ISO 9001:2015 and ISO 14001:2015 standards, ensuring consistent quality and environmental responsibility. Additionally, each batch undergoes random destructive testing, including cyclic compression testing to 500,000 cycles and seam tensile testing, to guarantee that the foam and upholstery maintain their integrity under continuous use.
The 801974889 also carries the CE marking, confirming compliance with the Machinery Directive 2006/42/EC, and is TÜV-tested for ergonomic safety and flame retardancy (FMVSS 302). This rigorous certification provides peace of mind for contractors working on EU-funded projects, safety-critical infrastructure, and mining operations where operator well-being and component traceability are paramount. By choosing the OEM-spec 801974889, you are not just buying a seat part – you are investing in validated engineering that keeps your XCMG excavator operator comfortable and productive, shift after shift, in the harshest conditions worldwide.
