BELPARTS MACHINERY LIMITED
| Certifiion | CE |
| Part name | Hydraulic Arm Cylinder |
| Part number | 203-63-62500 |
| Delivery Time | 3-7 Day |
| Condition | New |
| Emission standards | Stage V |
| Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL |
| Warranty | 1 Year |
| Quality | Aftermarket High Quality |
| Supply Ability | 100 PCS / Months |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air |
| Model | PC120-3 |
| Packaging Details | Wooden Case Packing |
| Appliion | Excavator |
| Model Number | PC120-3 |
| Brand Name | Belparts |
| Place of Origin | China |
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Product Specification
| Certifiion | CE | Part name | Hydraulic Arm Cylinder |
| Part number | 203-63-62500 | Delivery Time | 3-7 Day |
| Condition | New | Emission standards | Stage V |
| Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL | Warranty | 1 Year |
| Quality | Aftermarket High Quality | Supply Ability | 100 PCS / Months |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air | Model | PC120-3 |
| Packaging Details | Wooden Case Packing | Appliion | Excavator |
| Model Number | PC120-3 | Brand Name | Belparts |
| Place of Origin | China | ||
| High Light | Komatsu excavator hydraulic cylinder ，PC120-3 hydraulic arm cylinder ，aftermarket Komatsu cylinder spare parts | ||
PC120-3 Hydraulic Arm Cylinder for Komatsu Excavator | PN:203-63-62500 | Premium Aftermarket Replacement
1. Basic Product Info
This high-strength aftermarket hydraulic arm (stick) cylinder is precision manufactured as a direct replacement spare part for Komatsu PC120-3 medium excavators. As the core hydraulic actuator of front working attachment, it controls arm extension and retraction to finish digging, material grabbing, loading and land leveling works. Widely used in municipal projects, road maintenance, landscaping and small quarry earthmoving jobs.
All cylinders are produced strictly following Komatsu OEM technical standards, with identical mounting dimensions, pin hole spacing and hydraulic port layout. Direct bolt-on installation on site without cutting, welding or any secondary modifiion.
| Item | Specifiion |
|---|---|
| Product Name | Hydraulic Arm (Stick) Cylinder |
| Applicable Model | Komatsu PC120-3 Excavator |
| OEM Part Number | 203-63-62500 |
| 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 |
|---|---|---|---|
| 1 | 203-63-62500 | ARM CYLINDER ASS'Y | 1 |
| 1 | 203-63-62540 | Cylinder | 1 |
| 2 | 203-63-62520 | ROD,PISTON | 1 |
| 3 | 707-28-11370 | HEAD,CYLINDER | 1 |
| 4 | 144-63-94170 | SEAL,DUST (KIT) | 1 |
| 5 | 07179-00097 | RING, SNAP | 1 |
| 6 | 07177-07530 | Bushing | 1 |
| 7 | 707-51-75211 | PACKING,ROD (KIT) | 1 |
| 9 | 07000-12105 | O-RING, STEERING PUMP MOUNTING | 2 |
| 10 | 07146-02106 | RING, BACK-UP (KIT) | 2 |
| 11 | 707-35-91110 | RING,BACK-UP (KIT) | 1 |
| 12 | 01010-51655 | BOLT,(FOR REINFORCED TYPE) | 12 |
| 13 | 707-36-11460 | Piston | 1 |
| 14 | 707-68-10580 | Nut | 1 |
| 15 | 707-44-11080 | RING,PISTON (KIT) | 1 |
| 16 | 07155-01125 | RING,WEAR (FOR WA120-1M) | 1 |
| 17 | 707-76-70130 | Bushing | 2 |
| 18 | 07145-00070 | SEAL,DUST? PISTON ROD | 4 |
| 19 | 707-40-11470 | Retainer | 1 |
| 20 | 707-71-50880 | PLUNGER | 1 |
| 21 | 707-71-50230 | PLUNGER | 1 |
| 22 | 707-71-91250 | Screw | 1 |
| 23 | 04260-00635 | BOWL, CHECK VALVE | 11 |
| 24 | 203-63-62570 | Tube | 1 |
| 25 | 01010-50855 | BOLT,(10M) | 2 |
| 26 | 01010-50845 | Screw | 2 |
| 27 | 01602-20825 | WASHER,SPRING?FOR ADDITIONAL REAR LAM | 4 |
| 28 | 07000-13030 | O-RING,BOOM (FOR 50 FEET LONG FRONT) | 1 |
| 29 | 707-88-99150 | BAND | 1 |
| 30 | 707-88-99120 | BAND | 1 |
| 31 | 707-88-99190 | BAND | 1 |
| 32 | 707-88-99110 | BAND | 1 |
| 33 | 07282-02793 | Clamp | 2 |
| 34 | 01010-51020 | BOLT,(FOR QUICK SHIFT) (MITSUBISHI) | 4 |
| 35 | 01010-51030 | BOLT,(FOR QUICK SHIFT) (MITSUBISHI) | 4 |
| 36 | 01602-21030 | WASHER, SPRING (SUPPLIED W/SPIDER ASSEMBLY) | 8 |
| Spec Item | Data |
|---|---|
| Bore Diameter | 105mm |
| Piston Rod Diameter | 70mm |
| Working Stroke | 1130mm |
| 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 & anti-deformation performance |
| Matching Seal Kit PN | 203-63-62500K |
| Working Temperature | -25℃ ~ +85℃ |
| Structure | Double ear lugs with quenched copper wear bushings, built-in buffer device to reduce reciproing impact |
3. Product Advantages
4. Supplier Brief
Our factory has more than ten years of mature experience in developing and manufacturing hydraulic cylinders for classic Komatsu PC series excavators including PC120-3. We supply complete boom, arm and bucket cylinder assemblies with mature production craft and full-process strict quality control systems. Our aftermarket hydraulic cylinders are exported to global aftermarket markets all year round, earning long-term trust and consistent favorable feedback from worldwide spare parts dealers.
5. FAQ
Q1: Can this arm cylinder fit Komatsu PC100-3 or PC120-5 excavators?
A: No. Each Komatsu excavator model adopts exclusive part numbers and unique structural dimensions without interchangeability. Please confirm your full 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 dedied supporting seal kit separately, and we will offer a competitive combined order quotation.
Q3: What packaging is used for long-distance overseas sea transportation?
A: Anti-rust oil filled into cylinder inner cavity, anti-rust grease evenly coated on piston rod surface. The whole cylinder wrapped with waterproof PE film and packed in reinforced export plywood cases to avoid collision, scratch and moisture damage during long ocean transit.
Q4: Are there tiered volume discounts when purchasing a full set of boom + arm + bucket cylinders?
A: Yes. Complete working device cylinder set orders enjoy graded volume discounts. Consolidated container shipment service is available to lower total logistics expenses.
Q5: What after-sales support if oil leakage occurs within warranty period?
A: Please provide clear photos of leakage position plus excavator serial number. We will arrange free seal replacement and professional remote troubleshooting guidance promptly.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2013
Total Annual:
$28000000-$41660000
Employee Number:
1200~1300
Ecer Certification：
Verified Supplier
Since 2013 Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013 Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts Who We Are Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha... Since 2013 Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013 Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts Who We Are Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
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