HITACHI Excavator Seal Kit ZX200 4448398 Boom Hydraulic Cylinder Seal Kit

Abnormality in seal

1. State: Deterioration (hardening, cracks)

Cause: 1. lncompatible with the oil used

2. degradation of the oil used

3. Abnormal rise of the oil temperature

4. Degradation from ozone

5. High-speed actuation (large heat generation)

Countermeasure: Change the seal material to one excellent in oil resistance, heat resistance, and weather resistance.

2. State: Swelling

Cause: 1. lncompatible with the oil used

2. Mixing of a foreign liquid such as cleaning solution

Countermeasure: Change seal material

3. State: Wear (mirror surface, striation, biased abrasion)

Cause:1. Excessive minimum pressure on the sliding surface

2. Long continuous pressure appliion time

3. Extremely short strokes

4. Excessive eccentricity (inappropriate bearing)

5. lnappropriate roughness of the contacting surface

6. lnsufficient lubriion ability of the oil used Countermeasuer for causes 1, 2, 3 : Change shape of the seal (for example, sharp lip-Rlip), Change seal material to one excellent in self-lubriion property.

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FAQ

Q1: Could you make it from other material?

A1: Yes, we can provide seal according to your requirements.

Q2: The website have not find mine model. What should I do?

A2: You can give us model number. We will respond quickly.

Q3: How can you guarantee the quality?

A3: 3 Months warranty. We promise to responsible for quality problem.

Q4: How to ship my order?

A4: Usually shipment by DHL, FedEx, UPS, TNT and EMS.

Q5: How can I pay?

A5: You can pay via T/T , WEST UNION or other payment terms we reach agreement.

Q6: Could you give me sample?

A6: Yes. Please inquiry us.