Place of Origin:
China
Brand Name:
Belparts
Certification:
CE
Model Number:
PC200-7
This heavy‑duty boom hydraulic cylinder acts as an aftermarket drop‑in replacement exclusively engineered for Komatsu PC200‑7 mid‑size excavator. As the primary load‑bearing hydraulic component for the front working assembly, it controls boom lifting, lowering and load‑holding performance for road grading, residential groundworks, drainage trenching, site clearing and light‑aggregate loading tasks. It remains a high‑demand stocked item for local equipment repair garages, second‑hand excavator rental operators and international spare‑part suppliers focusing on Komatsu classic 7‑series diggers.
Every production procedure adheres strictly to original Komatsu OEM blueprint specifications. Mount‑lug spacing, pin‑hole diameter, bushing inner dimension and hydraulic port positioning strictly comply with part number 707‑01‑0A290. No on‑site trimming, grinding or welding modification is required during installation, which cuts down manual repair expenses and minimises project downtime caused by sudden hydraulic cylinder breakdown.
| Item | Detailed Information |
|---|---|
| Full‑Item Name | Complete Boom Hydraulic Cylinder Assembly |
| Applicable Equipment | Komatsu PC200‑7 Medium Excavator |
| OEM Part Number | 707‑01‑0A290 |
| Product Standard | Reinforced aftermarket hydraulic assembly for general‑to‑medium heavy‑duty construction |
| Warranty Term | 12‑month warranty against all factory‑originated production flaws |
| Minimum Order | 1 unit, in‑stock inventory available for prompt shipment |
| QC Protocol | ISO9001 traceable whole‑cycle production; 100% high‑pressure airtight leak‑test and full‑stroke reciprocating fatigue testing prior to shipment |
| # | Part No. | Description | Qty |
|---|---|---|---|
| G-1 | (707-01-XZ820) | CYLINDER GROUP,L.H. (FINAL COATING) | 1 |
| G-2 | (707-01-XZ830) | CYLINDER GROUP,R.H. (FINAL COATING) | 1 |
| ---- | ==================== | ||
| 1 | 707-01-0A290 | CYLINDER ASS'Y | 1 |
| 1 | 707-13-12260 | Cylinder | 1 |
| 2 | 707-76-70651 | Bushing | 1 |
| 3 | 07145-00070 | SEAL,DUST? PISTON ROD | 2 |
| 4 | 707-58-85221 | ROD,PISTON | 1 |
| 5 | 707-76-80431 | BUSHING,PISTON | 1 |
| 6 | 07145-00080 | SEAL,DUST (KIT) | 2 |
| 7 | 707-27-12921 | HEAD,CYLINDER | 1 |
| 8 | 07179-13099 | RING, SNAP | 1 |
| 9 | 707-56-85510 | SEAL,DUST (KIT) | 1 |
| 10 | 707-52-90610 | Bushing | 1 |
| 11 | 707-51-85030 | PACKING,ROD (KIT) | 1 |
| 12 | 07000-15110 | O-RING (KIT) | 1 |
| 13 | 707-35-91220 | RING,BACK-UP (KIT) | 1 |
| 14 | 707-51-85640 | RING,BUFFER (KIT) | 1 |
| 15 | 01010-81670 | BOLT,(WITH WEAR GUARD) | 12 |
| 16 | 01643-51645 | WASHER, SPRING | 12 |
| 17 | 707-36-12851 | Piston | 1 |
| 18 | 707-44-12180 | RING,(Y1621-01A0-14) | 1 |
| 19 | 707-39-12140 | RING,WEAR (KIT) | 2 |
| 20 | 707-44-12911 | Ring | 2 |
| 21 | 707-71-70800 | PLUNGER | 1 |
| 22 | 07000-15075 | O-RING (KIT) | 1 |
| 23 | 707-35-90930 | RING,BACK-UP (KIT) | 2 |
| 24 | 01310-01216 | SCREW,NYLON | 1 |
| 25 | 707-71-34621 | COLLAR | 1 |
| 26 | 707-35-91220 | RING,BACK-UP (KIT) | 2 |
| 27 | 07000-15110 | O-RING (KIT) | 1 |
| 28 | 707-86-66250 | TUBE,L.H | 1 |
| 28 | 707-86-66260 | TUBE,R.H | 1 |
| 29 | 20Y-62-24580 | TUBE,L.H | 1 |
| 29 | 20Y-62-24610 | TUBE,R.H | 1 |
| 30 | 01435-01055 | BOLT, MOUNT DRYER TO BRACKET AND FRAME | 4 |
| 31 | 01435-01040 | BOLT,(SHIM 3-PIECE) | 4 |
| 32 | 07000-13030 | O-RING,BOOM (FOR 50 FEET LONG FRONT) | 2 |
| 33 | 707-88-22550 | BRACKET,L.H | 1 |
| 33 | 707-88-22560 | BRACKET,R.H | 1 |
| 34 | 707-88-21251 | BAND | 1 |
| 35 | 01435-01030 | BOLT - LOWER OIL COOLER OUTLET TUBEMOUNTING | 2 |
| 36 | 07283-22738 | CLIP, SEAT | 2 |
| 37 | 01599-01011 | NUT,(WITH UNDER MIRROR) | 4 |
| 38 | 01643-31032 | WASHER,(WITH AUTO EMERGENCY STEERING) | 4 |
| ---- | ==================== | ||
| K | 707-99-46130 | SERVICE KIT | 2 |
| Technical Index | Standard Value |
|---|---|
| Cylinder Tube Inner Bore | 116 mm |
| Hard‑Chrome‑Coated Piston Rod Diameter | 76 mm |
| Effective Working Stroke | 1280 mm |
| Rated Operating Pressure | 31.4 MPa |
| Factory Hydrostatic Test Pressure | 47.1 MPa (1.5‑fold rated pressure to check internal and external oil seepage) |
| Cylinder Tube Raw Material | High‑yield seamless alloy steel processed with precision deep‑honing treatment, delivering a low‑friction inner wall that resists prolonged hydraulic‑fluid abrasion under cyclic construction loads |
| Piston Rod Treatment | 40CrMo quenched‑and‑tempered base metal, 28‑32μm compact hard‑chrome plating, surface hardness HRC68‑72. It withstands scratches and bending deformation from accidental bumps against rubble, tree stumps and concrete curbs on‑site |
| Compatible Seal Kit PN | 707‑01‑0A290‑KIT |
| Working Temperature Range | -25℃ ~ +85℃ |
| Structural Characteristic | Up‑thickened integrated boom mounting lugs fitted with self‑lubricating copper‑alloy bushings; built‑in single‑stage buffer structure to absorb end‑stroke impact and reduce vibration noise during repeated boom up‑and‑down movements |
Precise OEM‑Level Dimensional Matching Only for Komatsu PC200‑7 Model
Part number 707‑01‑0A290 is tailor‑made for the standard PC200‑7 boom assembly. All mounting geometries replicate genuine Komatsu OEM components perfectly, pairing seamlessly with original boom linkages and hydraulic hoses. It prevents assembly offset that would accelerate seal degradation and lead to persistent oil leakage if forced‑fitted.
Optimised Reinforced Design Adapted to Long‑Term Urban‑Construction Cycles
The cylinder barrel and cast‑integrated lugs receive targeted wall‑thickness reinforcement, custom‑tuned for the daily working pattern of PC200‑7 excavators. It copes with recurring alternating medium loads plus occasional on‑site collisions, outperforming thin‑walled generic aftermarket cylinders that wear out rapidly under regular earth‑moving tasks.
Dual Independent Pre‑Shipment Quality Inspections to Rule Out Hidden Defects
Each finished boom cylinder undergoes two rounds of rigorous offline testing. A full‑stroke cyclic fatigue test replicates long‑term daily digging work to validate structural stability. A prolonged high‑pressure immersion tightness‑check locates all potential leakage points. Defective products are eliminated before warehousing, avoiding unplanned construction halts for end‑users.
High‑Cost‑Effective Solution for Second‑Hand 7‑Series Excavator Fleet Owners
Original Komatsu OEM spare parts for the discontinued PC200‑7 line suffer from high pricing and limited supply. This aftermarket boom cylinder achieves equivalent structural rigidity, running smoothness and service lifespan at a far more competitive price point. It lowers recurring maintenance expenditure for independent service workshops and rental businesses managing fleets of pre‑owned PC200‑7 machines.
Flexible Global Shipping Choices for Different Client Lead‑Time Requirements
All in‑stock items can be dispatched within three working days after payment confirmation. Air‑express delivery covers urgent breakdown‑repair orders for remote building sites; consolidated sea bulk cargo and full‑FCL container shipments offer budget‑friendly wholesale solutions for machinery distributors serving Africa, Southeast‑Asia, the Middle‑East and Latin‑American municipal‑construction markets.
Our production plant has over ten‑year specialised experience in developing and mass‑producing hydraulic cylinders for Komatsu 7‑series mid‑size excavators, with the PC200‑7 as one of our core mature models. We maintain a full‑chain production system including heavy‑duty precision forging, deep inner honing, integral heat‑treatment and automated chrome‑plating. Load‑simulation test benches mimic real‑world construction scenarios to continuously boost the cylinder’s anti‑impact performance. Our aftermarket hydraulic‑cylinder range is exported internationally year‑round. We have built long‑term stable partnerships with global machinery‑parts wholesalers thanks to accurate model‑fitment and consistent quality control.
Q1: Can this boom cylinder fit PC200‑7L, PC210‑7 or PC220‑7 excavators?
A: Cross‑model installation is not supported. Different Komatsu variants adopt exclusive part‑codes and unique lug‑mounting dimensions which cannot be interchanged. Always confirm the full machine model before placing orders.
Q2: Does the standard package include the matching seal repair kit?
A: Standard cargo only includes the full boom cylinder assembly. The dedicated 707‑01‑0A290‑KIT seal kit is sold separately. We provide a discounted combined quote if you purchase the cylinder together with the seal set.
Q3: What anti‑rust and anti‑damage protection is used for ocean‑going long‑haul delivery?
A: Anti‑rust hydraulic oil is injected into the front‑and‑rear cylinder cavities to stop internal corrosion. Anti‑rust grease is evenly spread over the exposed piston‑rod surface. The whole assembly is wrapped in multi‑layer heavy‑duty waterproof PE film then secured inside reinforced plywood export crates, guarding against scratches, deformation and moisture damage during lengthy sea transit.
Q4: Do volume‑based tier discounts apply when ordering a complete boom‑arm‑bucket cylinder set for PC200‑7?
A: Yes. Bulk orders for the full front‑working‑device cylinder set qualify for progressive discounts. Consolidated full‑container sea‑freight can also be arranged to cut overall international logistics costs for large‑batch purchases.
Q5: What after‑sales support is available if oil leakage occurs within the 12‑month warranty period?
A: Submit clear photos of the leakage spot as well as your excavator serial number for validation. We will supply free replacement seal components plus step‑by‑step remote maintenance guidance in a timely manner to fix oil‑leak issues without holding up construction progress.
Send your inquiry directly to us