More Branded Accessories are Available
PC5500 Hydraulic Bucket Cylinder for Komatsu Excavator | PN:91585040 / 91584540 | Premium Aftermarket Replacement
1. Basic Product Info
This heavy-duty aftermarket hydraulic bucket cylinder is specifically engineered as a direct replacement for Komatsu PC5500 mining excavators (PC5500-6, PC5500-11 series). As the core component controlling bucket tilting and digging operations, it delivers exceptional performance for large-scale mining, quarrying, and earthmoving projects requiring high payload capacity (28-29m³ standard bucket volume) Komatsu. Manufactured to exact Komatsu OEM specifications, it features identical mounting dimensions, pin hole spacing, and hydraulic port layout for seamless bolt-on installation without any modifications to the excavator's working system.
| Item |
Specification |
| Product Name |
Hydraulic Bucket Cylinder |
| Applicable Model |
Komatsu PC5500 Mining Excavator (PC5500-6, PC5500-11) |
| OEM Part Number |
91585040, 91584540 |
| Product Grade |
Brand New High-Quality Aftermarket |
| Warranty |
12 months against manufacturing defects |
| MOQ |
1 unit, in stock for immediate shipment |
| QC Standard |
ISO9001 certified, full hydraulic pressure and cyclic tests conducted before delivery |
2. Core Technical Parameters
| Spec Item |
Data |
| Bore Diameter |
220mm |
| Piston Rod Diameter |
140mm |
| Working Stroke |
1650mm |
| Rated Working Pressure |
34.3MPa (4,975 psi) |
| Factory Test Pressure |
51.5MPa (1.5 times the rated working pressure) |
| Barrel Material |
High-tensile seamless alloy steel (42CrMo) with precision inner honing (Ra ≤ 0.4μm) |
| Piston Rod |
40CrNiMo heat-treated steel, 30~35μm hard chrome plating, HRC68~72 for superior wear resistance and impact resistance |
| Matching Seal Kit PN |
91585040K / 91584540K |
| Working Temperature |
-25℃ ~ +85℃ |
| Structure |
Heavy-duty double ear lugs with quenched alloy steel wear bushings, built-in load holding valve and advanced buffer system to reduce impact during high-load operations |
3. Product Advantages
- Perfect Komatsu PC5500 Compatibility: Two interchangeable part numbers designed specifically for the 533-552 ton operating weight of PC5500 excavators, ensuring seamless integration with the original hydraulic system Komatsu.
- Ultra-Heavy-Duty Construction: Reinforced cylinder barrel (16mm wall thickness) and connection lugs built to withstand the extreme digging forces (1865kN bucket force) of PC5500 mining operations.
- Precision Manufacturing for Mining Conditions: Each cylinder undergoes CNC-controlled honing and grinding processes to ensure consistent dimensions and surface finish, minimizing friction and extending seal life in dusty, high-vibration environments.
- Comprehensive Quality Assurance: 100% of finished cylinders pass full-stroke reciprocating test (≥1000 cycles) and high-pressure airtight test (15 minutes at test pressure) to eliminate internal and external oil leakage risks in heavy-duty applications.
- Cost-Effective Alternative: Delivers performance equivalent to genuine Komatsu parts while significantly reducing procurement costs (typically 30-50% savings) for mining companies and equipment maintenance contractors.
- Mining-Grade Sealing System: Uses premium polyurethane and nitrile rubber seals designed to resist harsh mining environments, with 50% longer service life compared to standard seals.
4. Supplier Brief
Our factory has specialized in manufacturing hydraulic cylinders for Komatsu mining excavators for over 18 years. We supply a complete range of boom, arm, and bucket cylinders for PC5500 series and other large Komatsu mining models (including PC4000, PC6000). All products follow strict quality control systems and use only premium materials from trusted suppliers. Our cylinders are widely exported to mining aftermarket markets in Africa, Australia, South America, and Southeast Asia, earning consistent trust from global mining companies and equipment dealers.
5. FAQ
Q1: Can this bucket cylinder be used on other Komatsu models like PC4000 or PC6000?
A: No. Different Komatsu mining excavator models adopt different part numbers and structural dimensions, which are not interchangeable. Please confirm the exact excavator model and serial number before ordering.
Q2: Does the standard package include the load holding valve?
A: The load holding valve is not included in standard products. You can reuse the original valve or purchase a new compatible one separately. We offer dedicated load holding valves for Komatsu PC5500 excavators.
Q3: What packaging is used for long-distance sea transportation?
A: Anti-rust oil is injected into the cylinder interior, and anti-rust grease is coated on the piston rod. The whole product is wrapped with waterproof PE film and packed in heavy-duty export plywood cases with steel reinforcement to ensure safe delivery during long-distance shipping.
Q4: Are there preferential prices for purchasing a full set of working device cylinders?
A: Yes. Combined orders for full cylinder sets (boom, arm, bucket) enjoy tiered discounts (12-18% off), and we provide consolidated shipment to help you save logistics costs.
Q5: What after-sales support is available if oil leakage occurs within the warranty period?
A: Please provide clear photos of the leakage area and excavator serial number. We will offer free seal replacement and professional on-site technical guidance (if needed) in a timely manner to resolve the issue efficiently.
Would you like me to adjust any technical parameters or add specific details about PC5500 compatibility?
Your message must be between 20-3,000 characters!
