K9000245 Buy SEAL;SHAFT K9000245 KOMATSU genuine, new aftermarket tractor parts with delivery DL300, DL400

1. Quick Details of  seal K9000245:

2. K9000245 parts on group :

3. K9000245  picture:

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5. FAQ

Q: Why is the K9000245 kit made of NBR, PU, FKM, PTFE and PA66 composite materials, and what are the advantages of this combination?
A: This multi-material design addresses the complex working conditions of excavator hydraulic cylinders. NBR provides excellent compatibility with mineral hydraulic oils and good elasticity for general sealing. PU buffer seal absorbs pressure shocks, protects the main seal, and offers superior wear resistance. FKM O-rings deliver high temperature resistance, aging resistance, and chemical stability, preventing leakage under extreme conditions. PTFE wear rings reduce friction between metal parts, extending cylinder life and lowering noise. PA66 backup rings prevent seal extrusion in high-pressure gaps. Together, these materials ensure stable performance, long service life, and wide adaptability in harsh environments.

Q: Can you describe the color, appearance and structural features of each component in the K9000245 kit?
A: Each component has distinct features. The NBR rod seal is black with a double-lip U-cup design, smooth outer surface, and fabric-reinforced core for durability. The PU buffer seal is orange, with a tapered profile to absorb pressure spikes. The NBR piston seal is black, U-shaped with anti-extrusion notches. FKM O-rings are brown, glossy, with uniform cross-section. PTFE wear rings are white, flat, rectangular with precision-cut grooves. PA66 backup rings are beige, rigid, circular. The dust wiper is black with an outward-facing lip to block dirt. All parts have precise dimensions and smooth edges for perfect fit.

Q: What are the key technical parameters like pressure rating, temperature range and service life of K9000245?
A: This heavy-duty seal kit is built for demanding conditions. Max working pressure: 420 bar, suitable for high-pressure hydraulic systems. Operating temperature: -35°C to +125°C, covering cold northern winters and hot tropical summers. Service life: Under normal medium-load conditions (≤300 bar, 40–80°C), it reaches 7000–9000 working hours. In harsh environments (heavy dust, frequent impacts, continuous high temperature), it still achieves 4500–5500 working hours, 60–80% longer than standard single-material kits. FKM O-rings maintain elasticity for over 10,000 hours normally.

Q: What common problems do low-quality seal kits have, and how does K9000245 solve these issues?
A: Low-quality kits often use recycled rubber or inferior materials, leading to premature failure. They suffer from oil leakage due to poor lip precision or material shrinkage. Under high pressure, seals may extrude, crack or twist, causing sudden cylinder failure. Inferior O-rings harden and become brittle, losing sealing ability. Low-grade PTFE wear rings wear quickly, leading to metal contact and cylinder damage. In contrast, K9000245 uses 100% virgin materials with strict QC. Precision-machined double-lip seals ensure tight sealing. PA66 backup rings prevent extrusion. High-quality FKM resists aging, and pure PTFE reduces friction. These features eliminate common failures, reduce maintenance frequency, and lower long-term costs.

Q: What installation steps and precautions should be followed for K9000245 to ensure optimal performance?
A: Proper installation is critical. First, disassemble the cylinder completely and clean all parts (grooves, rod, bore) with clean hydraulic oil—remove all old seal debris, metal shavings, and dirt; even tiny particles can damage new seals. Second, inspect the piston rod and bore for scratches, dents, or corrosion; repair or replace damaged parts. Third, lubricate all new seals and O-rings with clean hydraulic oil; never use grease, as it causes rubber swelling. Fourth, install seals in the correct orientation (rod seal lip faces pressure side; piston seal open side faces piston head); use proper tools to avoid twisting. Fifth, fit wear rings and backup rings tightly into grooves with no gaps. Finally, test at low pressure first after assembly to check for smooth movement and leaks before full-pressure operation.

Q: How is the K9000245 kit packaged, and what storage conditions are recommended?
A: Each kit is individually sealed in an oil-resistant transparent plastic bag with a labeled component list. The bag is placed in a sturdy cardboard box with foam padding to prevent deformation during transit. For storage, keep the kit in a cool, dry, dark warehouse away from direct sunlight, heat sources, ozone, and corrosive chemicals. Ideal storage temperature is 15–25°C, relative humidity below 60%. Avoid stacking heavy items on boxes. Proper storage maintains elasticity and dimensional stability, extending shelf life to up to 2.5 years without performance loss.

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