Komatsu PC160-7 PC160LC-7 Hydraulic Bucket Cylinder 21K-70-73120 118mm Bore Aftermarket

This high-strength aftermarket hydraulic bucket cylinder is precision manufactured as a direct OEM replacement for Komatsu PC160-7 standard track and PC160LC-7 long-track medium excavators. As the core hydraulic actuator of front working attachment, it drives bucket digging, soil grabbing, stone loading and material dumping. Widely applied in municipal renovation, road construction, landscaping, pipeline engineering and small quarry earthmoving projects.

All cylinders are strictly produced following Komatsu original technical drawings and OEM standards, with fully consistent mounting dimensions, pin hole spacing and hydraulic port layout. Direct bolt-on installation without cutting, welding or any on-site secondary modification.

1. Dual Model Universal Fitment
   Perfectly compatible with both standard-track PC160-7 and long-track PC160LC-7. All assembly sizes, lug spacing and oil port positions fully match original PN 21K-70-73120 cylinder, seamlessly connecting bucket linkages and hydraulic pipelines for stable continuous medium-load construction operation.
2. Medium-Load Reinforced Optimized Structure
   Thickened cylinder barrel and joint lugs are upgraded for frequent daily construction scenarios, resisting long-term cyclic loads and minor collision abrasion to extend overall service life effectively.
3. Multi-Round Strict Pre-Delivery Inspection
   Each finished cylinder undergoes full-stroke reciprocating cycle test and high-pressure airtight leak detection, completely eliminating hidden internal and external oil leakage risks.
4. Excellent Cost Performance
   Delivers the same stability and service lifespan as genuine Komatsu OEM spare parts, greatly cutting repeated procurement costs for repair shops, equipment rental companies and global spare parts wholesalers.
5. Flexible Global Logistics Support
   In-stock items can be dispatched within 3 working days. Air freight handles urgent breakdown rush orders; sea freight offers cost-effective bulk wholesale shipping to Africa, Southeast Asia, Middle East and Latin American markets.

Our factory has over 10 years of mature experience in R&D and mass production of hydraulic cylinders for classic Komatsu PC medium excavator series including PC160-7/PC160LC-7. We supply complete boom, arm and bucket cylinder assemblies with mature forging, honing and heat treatment craft, plus full-process strict quality control. Our aftermarket hydraulic cylinders are exported worldwide all year round, winning long-term trust and consistent positive feedback from global machinery spare parts dealers.

Q1: Can this bucket cylinder fit Komatsu PC160-6 or PC180-7 excavators?

A: No. Different Komatsu excavator generations and models adopt exclusive part numbers and unique structural dimensions without interchangeability. Please confirm your complete machine model before placing orders.

Q2: Does the standard package include the matching seal repair kit?

A: Seal repair kit is not included in standard delivery. You can purchase the dedicated supporting seal kit separately, and we will offer a competitive combined order quotation.

Q3: How is the cylinder packed for long-distance ocean transportation?

A: Anti-rust oil filled into cylinder inner cavity, anti-rust grease evenly coated on piston rod surface. The whole cylinder wrapped with thick waterproof PE film and packed in reinforced export plywood cases to avoid scratch, collision and moisture damage during long sea transit.

Q4: Are there tiered volume discounts for purchasing a full set of boom + arm + bucket cylinders for PC160-7 series?

A: Yes. Complete working device cylinder set orders enjoy graded volume discounts. Consolidated FCL container shipment service is available to reduce total logistics expenditure.

Q5: What after-sales technical support if oil leakage occurs within the 12-month warranty period?

A: Please provide clear photos of leakage position plus your excavator serial number. We will arrange free seal replacement and professional remote troubleshooting guidance promptly.