128-9278 1289278 NBR PU FKM Composite Excavator Seal Kit for 330/330L Arm Cylinder Maintenance 330-A 330-A L
Price:
Negotiable
MOQ:
10
Delivery Time:
Within 5-15 days after getting your desposit
Brand:
OUB
Product Description
1. Quick Details of seal 128-9278:
| Part NO. | 128-9278 |
| Machine | excavator |
| Size | OEM |
| Material | Reinforced oil-resistant NBR rubber |
| Type | ARM CYLINDER SERVICE KIT |
2. 128-9278 picture:
3. Service part number :
| PART NO. | PART NO. | Part NO. |
| 3821152 | 5P6393 | 3P0655 |
| 6E1572 | 6V1196 | 3052215 |
| 2H3934 | 6V5759 | 5K-5959 |
| 2536010 | 8L5189 | 1H-6227 |
| 3215628 | 2257738 | 1362967 |
| 2590891 | 175-7895 | 6V3251 |
| 6V-1196 | 095-1603 | 6J2419 |
| 5P-4889 | 6V8218 | 6V6580 |
| 032-8970 | 6V8978 | 2386646 |
| 325-3780 | 095-0598 | 2K8198 |
4. FAQ
Q: Which excavator models and hydraulic cylinders does this 128-9278 seal kit fit, and what sealing components are packed inside?
A: This full repair seal kit matches 330, 330L series crawler excavators, specially designed for arm hydraulic cylinders equipped with 3306 engines. It integrates all required sealing parts for one full cylinder overhaul, including rod seal, piston seal, PU buffer ring, PTFE anti-extrusion ring, FKM high-temperature O-rings, dust wiper and matching small flat gaskets. Mechanics do not need to source separate scattered seals during disassembly maintenance, greatly cutting repair time on construction sites.
A: This full repair seal kit matches 330, 330L series crawler excavators, specially designed for arm hydraulic cylinders equipped with 3306 engines. It integrates all required sealing parts for one full cylinder overhaul, including rod seal, piston seal, PU buffer ring, PTFE anti-extrusion ring, FKM high-temperature O-rings, dust wiper and matching small flat gaskets. Mechanics do not need to source separate scattered seals during disassembly maintenance, greatly cutting repair time on construction sites.
Q: What practical advantages does the four-material combined design bring to excavator arm cylinder sealing?
A: Excavator arm cylinders bear frequent reciprocating impact and heavy load friction during excavation and loading work, with drastic temperature shifts all year round. NBR main seals balance oil resistance and elastic recovery to block internal and external hydraulic oil leakage steadily. PU buffer rings absorb instantaneous hydraulic pressure spikes to avoid tearing damage to core sealing lips. FKM O-rings resist aging under long-time high-temperature oil soaking. PTFE flat rings reduce metal friction and stop seal extrusion cracking under peak pressure, forming multi-layer protective structure to extend overall service life.
Q: What color and structural features do each component of this seal kit have?
A: NBR rod and piston main seals are solid black with double-lip U-shaped smooth sealing surface. PU buffer rings are pale yellow with special tapered shock-absorbing outline. FKM O-rings are dark coffee brown with uniform round cross-section without deformation. Milky white thin PTFE backup rings have burr-free smooth edges. The dust wiper is black with outward dust scraping lip. Every accessory has standard unified sizes, easy to sort and identify during on-site assembly.
Q: What stable working pressure and temperature range can this whole set of seals withstand?
A: This composite seal kit can continuously bear stable working pressure up to 360 bar. NBR and PU accessories work normally within -31°C ~ +120°C, while FKM O-rings can adapt to -25°C ~ +140°C. It can maintain reliable sealing performance in low-temperature mountain construction in winter and long-hour full-load digging operation in summer, without swelling, hardening, cracking or oil leakage failure.
5. Exhibition and Wearhous
Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More
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Company
Guangzhou Opal Machinery Parts Operation Department
Location
NO.212,Zhu ji rode,tian he distric,guangzhou,China
Contact Person
Vivian