Nguồn gốc:
Trung Quốc
Hàng hiệu:
Belparts
Chứng nhận:
CE
Số mô hình:
PC228USLC-3 PC228US-3
More Branded Accessories are Available
| Hydraulic Parts | Hydraulic Pump | Final Drive | Travel Reduction |
| Swing Motor | Swing Reduction | Control Valve | Gear Parts |
| Slew Bearing | Engine Assembly | Hydraulic Cylinder | ECU |
Komatsu PC228US-3 / PC228USLC-3 Hydraulic Bucket Cylinder | PN:22U-63-02633 | Premium Aftermarket Replacement
1. Basic Product Info
This heavy-duty aftermarket hydraulic bucket cylinder is precision manufactured as a direct OEM replacement for Komatsu PC228US-3 short-tail standard track and PC228USLC-3 long-track zero-swing excavators. As the core hydraulic actuator of front working attachment, it controls bucket digging, rock grabbing, material loading and dumping. Widely used in urban narrow construction sites, pipeline engineering, municipal renovation and small-medium quarry earthmoving projects.
All cylinders are strictly produced in accordance with 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.
| Item | Specification |
|---|---|
| Product Name | Hydraulic Bucket Cylinder |
| Applicable Model | Komatsu PC228US-3, PC228USLC-3 Zero Tail Excavator |
| OEM Part Number | 22U-63-02633 |
| Product Grade | Brand New High-Quality Aftermarket |
| Warranty | 12 months against manufacturing defects |
| MOQ | 1 unit, sufficient stock for immediate shipment |
| QC Standard | ISO9001 certified, full hydraulic pressure & cyclic fatigue testing before delivery |
2. Core Technical Parameters
| # | Part No. | Description | Qty |
|---|---|---|---|
| G-1 | (22U-63-X9330) | CYLINDER GROUP,(NATURAL YELLOW) | 1 |
| ---- | ==================== | ||
| 1 | 22U-63-02633 | CYLINDER ASS'Y | 1 |
| 1 | 22U-63-72342 | Cylinder | 1 |
| 2 | 20Y-70-21230 | Bushing | 1 |
| 3 | 07145-00070 | SEAL,DUST? PISTON ROD | 2 |
| 4 | 205-63-71320 | ROD,PISTON | 1 |
| 5 | 22U-70-21260 | Bushing | 2 |
| 6 | 20Y-70-23220 | SEAL,DUST (KIT) | 2 |
| 7 | 707-27-11981 | HEAD,CYLINDER | 1 |
| 8 | 07179-13094 | RING, SNAP | 1 |
| 9 | 195-63-92190 | SEAL,DUST (KIT) | 1 |
| 10 | 707-52-90560 | Bushing | 1 |
| 11 | 707-51-80030 | PACKING,ROD (KIT) | 1 |
| 12 | 07000-15105 | O-RING (KIT) | 1 |
| 13 | 707-35-91150 | RING,BACK-UP (KIT) | 1 |
| 14 | 707-51-80640 | RING,BUFFER (KIT) | 1 |
| 15 | 01010-81670 | BOLT,(WITH WEAR GUARD) | 12 |
| 16 | 01643-51645 | WASHER, SPRING | 12 |
| 17 | 707-36-11661 | Piston | 1 |
| 18 | 707-44-11280 | RING,(Y1620-01A1-19) | 1 |
| 19 | 707-39-11510 | RING,(Y1620-01A1-20) | 2 |
| 20 | 707-44-11920 | Ring | 2 |
| 21 | 707-35-90360 | RING,BACK-UP (KIT) | 2 |
| 22 | 07000-15070 | O-RING (KIT) | 1 |
| 23 | 01310-01216 | SCREW,NYLON | 1 |
| 24 | 07020-00000 | FITTING, GREASE - UPPER HINGE PIN | 1 |
| 25 | 07020-00000 | FITTING, GREASE - UPPER HINGE PIN | 1 |
| 26 | 205-63-71171 | Tube | 1 |
| 27 | 01435-01055 | BOLT, MOUNT DRYER TO BRACKET AND FRAME | 2 |
| 28 | 01435-01040 | BOLT,(SHIM 3-PIECE) | 2 |
| 29 | 07000-13030 | O-RING,BOOM (FOR 50 FEET LONG FRONT) | 1 |
| 30 | 22U-63-72390 | Bracket | 2 |
| 31 | 707-88-21270 | BAND | 2 |
| 32 | 01010-81035 | BOLT,(F4320-52A0 -5 ) | 4 |
| 33 | 01643-51032 | WASHER, (WITHOUT EMERGENCY STEERING) | 4 |
| 34 | 07282-02793 | Clamp | 2 |
| 35 | 01010-81020 | BOLT,(FOR MONO LEVER STEERING) | 4 |
| 36 | 01643-31032 | WASHER,(WITH AUTO EMERGENCY STEERING) | 4 |
| ---- | ==================== | ||
| 37 | 707-99-45220 | SERVICE KIT | 1 |
| Spec Item | Data |
|---|---|
| Bore Diameter | 126mm |
| Piston Rod Diameter | 82mm |
| Working Stroke | 1360mm |
| Rated Working Pressure | 31.4MPa |
| Factory Test Pressure | 47.1MPa (1.5 times rated working pressure) |
| Barrel Material | High-tensile seamless alloy steel with precision inner honing |
| Piston Rod | 40CrMo heat-treated steel, 28~32μm hard chrome plating, HRC68–72, excellent wear resistance & anti-bending performance |
| Matching Seal Kit PN | 22U-63-02633K |
| Working Temperature | -25℃ ~ +85℃ |
| Structure Feature | Double reinforced ear lugs with quenched copper wear bushings, built-in buffer device to reduce reciprocating impact and noise for frequent narrow-site operation |
3. Product Advantages
Compatible with standard track PC228US-3 and long-track PC228USLC-3 short-swing excavators. All assembly sizes, lug spacing and oil port positions fully match original PN 22U-63-02633 cylinder, seamlessly connecting bucket linkages and hydraulic pipelines for stable continuous medium-heavy load operation in compact construction spaces.
Thickened cylinder barrel and joint lugs are customized for frequent narrow-space work, resisting cyclic loads and wall/stone minor collisions to extend service life effectively.
Each finished cylinder undergoes full-stroke reciprocating cycle test and high-pressure airtight leak detection, completely eliminating hidden internal and external oil leakage risks.
Delivers identical stability and service lifespan as genuine Komatsu OEM spare parts, greatly cutting repeated procurement costs for repair shops, urban equipment rental fleets and global spare parts wholesalers.
In-stock items can be dispatched within 3 working days. Air freight supports urgent breakdown rush orders; sea freight provides cost-saving bulk wholesale shipping for Africa, Southeast Asia, Middle East markets.
4. Supplier Brief
Our factory has over 10 years of mature experience in R&D and mass production of hydraulic cylinders for Komatsu US series zero-tail excavators including PC228US-3 / PC228USLC-3. 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.
5. FAQ
Q1: Can this bucket cylinder fit Komatsu PC228US-2 or PC228US-8 excavators?
A: No. Different generations of Komatsu short-tail excavators adopt exclusive part numbers and unique structural dimensions without interchangeability. Please confirm your complete machine model before ordering.
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 PC228US-3 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.
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