BELPARTS MACHINERY LIMITED
| Condition | New |
| Emission standards | Stage V |
| Quality | Aftermarket High Quality |
| Delivery Time | 3-7 Day |
| Part name | Hydraulic Boom Cylinder |
| Part number | 21W-63-02131 |
| Warranty | 1 Year |
| Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL |
| Packaging Details | Wooden Case Packing |
| Application | Excavator |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air |
| Supply Ability | 100 PCS / Months |
| Model | PC75UU-2 |
| Model Number | PC75UU-2 |
| Place of Origin | China |
| Certification | CE |
| Brand Name | Belparts |
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Product Specification
| Condition | New | Emission standards | Stage V |
| Quality | Aftermarket High Quality | Delivery Time | 3-7 Day |
| Part name | Hydraulic Boom Cylinder | Part number | 21W-63-02131 |
| Warranty | 1 Year | Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL |
| Packaging Details | Wooden Case Packing | Application | Excavator |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air | Supply Ability | 100 PCS / Months |
| Model | PC75UU-2 | Model Number | PC75UU-2 |
| Place of Origin | China | Certification | CE |
| Brand Name | Belparts | ||
| High Light | Komatsu excavator hydraulic boom cylinder ，PC75UU-2 aftermarket hydraulic cylinder ，Hydraulic cylinder assy with warranty | ||
Aftermarket boom cylinder exclusively for Komatsu PC75UU-2 Mini Excavator (S/N:5001 and above), OEM part number: 21W-63-02131, interchange alternative part:21W-63-02210/21W-63-02310, direct replacement original boom cylinder for lifting boom arm in earthmoving, landscaping, small quarry operation. 1:1 OEM dimension for direct bolt-on installation without modification.
| Item | Parameter |
|---|---|
| Product Name | Boom Hydraulic Cylinder |
| Applicable Model | Komatsu PC75UU-2 |
| OEM PN | 21W-63-02131 |
| Quality Class | Premium Aftermarket New |
| Warranty | 12 months against manufacturing defects |
| MOQ | 1pc available from stock |
| QC Standard | ISO9001 certified, full high-pressure airtight test before shipment |
| # | Part No. | Description | Qty |
|---|---|---|---|
| G-1 | (21W-63-X2310) | CYLINDER GROUP,BOOM | 1 |
| G | (21W-63-X2131) | CYLINDER GROUP,BOOM | 1 |
| ---- | ==================== | ||
| 1 | 21W-63-02310 | CYLINDER ASS'Y,BOOM | 1 |
| 1 | 21W-63-02131 | CYLINDER ASS'Y,BOOM | 1 |
| 1 | 21W-63-56840 | CYLINDER,BOOM | 1 |
| 1 | 21W-63-56541 | CYLINDER,BOOM | 1 |
| 2 | 707-76-65170 | Bushing | 1 |
| 3 | 07145-00065 | SEAL,DUST? PISTON ROD | 2 |
| 4 | 07020-00000 | FITTING, GREASE - UPPER HINGE PIN | 1 |
| 5 | 707-29-12850 | HEAD, CYLINDER | 1 |
| 5 | 707-29-12350 | HEAD,CYLINDER | 1 |
| 6 | 707-52-10700 | Bushing | 1 |
| 7 | 707-51-70211 | PACKING,(Y1621-01A0-9) | 1 |
| 8 | 144-63-95170 | SEAL,OIL? CYLINDER HEAD | 1 |
| 9 | 07179-12084 | RING, SNAP | 1 |
| 10 | 07000-12115 | O-RING,(Y1621-01A0-10) | 1 |
| 10 | 07000-12115 | O-RING,(Y1621-01A0-10) | 2 |
| 11 | 07146-02116 | RING,(Y1621-01A0-11) | 1 |
| 11 | 07146-02116 | RING,(Y1621-01A0-11) | 3 |
| 12 | 07000-02120 | O-RING,COVER? TRANSFER CASE | 1 |
| 13 | 21W-63-56820 | ROD,PISTON | 1 |
| 13 | 21W-63-56520 | ROD,PISTON | 1 |
| 14 | 707-76-65330 | Bushing | 1 |
| 14 | 707-76-65270 | Bushing | 1 |
| 15 | 07145-00065 | SEAL,DUST? PISTON ROD | 2 |
| 16 | 707-71-60780 | PLUNGER | 1 |
| 17 | 707-40-11370 | Spacer | 1 |
| 18 | 707-36-12170 | Piston | 1 |
| 19 | 707-44-12180 | RING,(Y1621-01A0-14) | 1 |
| 20 | 07156-01215 | RING,(Y1621-01A0-15) | 1 |
| 21 | 07165-15252 | NUT, NYLOCK | 1 |
| 22 | 21W-63-56870 | Tube | 1 |
| 22 | 21W-63-56570 | Tube | 1 |
| 23 | 21W-63-56582 | Tube | 1 |
| 23 | 21W-63-56581 | Tube | 1 |
| 24 | 01010-51020 | BOLT,(FOR QUICK SHIFT) (MITSUBISHI) | 1 |
| 25 | 01643-31032 | WASHER,(WITH AUTO EMERGENCY STEERING) | 1 |
| 26 | 07283-22236 | U-BOLT, TUBE CLAMP | 1 |
| 27 | 01599-01011 | NUT,(WITH UNDER MIRROR) | 2 |
| 28 | 01643-31032 | WASHER,(WITH AUTO EMERGENCY STEERING) | 2 |
| ---- | ==================== |
| Spec | Data |
|---|---|
| Cylinder Bore | 120mm |
| Piston Rod Dia | 70mm |
| Rated Working Pressure | 32MPa |
| Factory Test Pressure | 48MPa (1.5×working pressure) |
| Tube Material | ST52 seamless steel, precision inner honing |
| Piston Rod | 40Cr quenched+tempered, hard chrome plating 30μm, HRC67~70 wear-resistant |
| Matching Seal Kit PN | 707-98-43200 |
| Working Temp | -25℃~+85℃ |
| Structure | Double lug with copper bushing, built-in end buffer cushion |
Factory focus on Komatsu mini excavator hydraulic cylinder over 10 years, complete boom/arm/bucket cylinder lineup covering PC50UU/PC60-7/PC75UU series, products mainly exported to Southeast Asia, Africa, Middle East aftermarket market.
Q1: Fit PC75UU-3?
A: No, PC75UU-3 uses different part number 21W-63-02161, dimension mismatch.
Q2: Seal kit included in standard package?
A: Standard cylinder without seal set; matching repair kit available with bundle discount when ordering together.
Q3: Export packing?
A: Inner anti-rust oil filling, rod anti-rust grease coating, PE wrap + solid plywood case for long ocean transportation.
Q4: Discount for full set 3pcs(boom+arm+bucket cylinder)?
A: Tiered wholesale discount + combined shipment to cut total freight cost.
Q5: Aftersales for leakage during warranty?
A: Submit leakage photo + machine serial number, free replacement seal kit or remote installation guidance provided.
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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