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128-9278 1289278 NBR PU FKM Composite Excavator Seal Kit for 330/330L Arm Cylinder Maintenance 330-A 330-A L

Name: 128-9278 1289278 NBR PU FKM Composite Excavator Seal Kit for 330/330L Arm Cylinder Maintenance 330-A 330-A L
Brand: Guangzhou Opal Machinery Parts Operation Department
SKU: 128-9278
Price: 34.10 USD
Availability: InStock

Product Details

Place of Origin: China

Brand Name: OUB

Certification: ISO9001

Model Number: 128-9278

Payment & Shipping Terms

Minimum Order Quantity: 10

Price: Negotiable

Packaging Details: PP Bag Inside.outer is carton with film wrapped.

Delivery Time: Within 5-15 days after getting your desposit

Payment Terms: L/C,D/A,D/P,T/T,Western Union

Supply Ability: 1000Pcs

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Product Details

Product Description

Product Details

Highlight:

Part No.::	128-9278	Part Name::	SERVICE KIT
Model:	330-A 330-A L	Machine:	Excavator
Material:	Reinforced Oil-resistant NBR Rubber	Color:	BLACK,BROWN,WHITE,BLUE
Install Parts:	ARM CYLINDER PARTS

Part No.::	128-9278
Part Name::	SERVICE KIT
Model:	330-A 330-A L
Machine:	Excavator
Material:	Reinforced Oil-resistant NBR Rubber
Color:	BLACK,BROWN,WHITE,BLUE
Install Parts:	ARM CYLINDER PARTS

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:

128-9278 1289278 NBR PU FKM Composite Excavator Seal Kit for 330/330L Arm Cylinder Maintenance 330-A 330-A L 0
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.

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.

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Tel: 86-135-33728134

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128-9278 1289278 NBR PU FKM Composite Excavator Seal Kit for 330/330L Arm Cylinder Maintenance 330-A 330-A L

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