XGMA XG31651 And XG31801.5.3 Series Hydraulic Cylinders Kit A27.02.1646

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XGMA XG31651 and XG31801.5.3 Series Hydraulic Cylinders Kit A27.02.1646

Internal Components
1. Wiper Seal: Installed at the outermost position to prevent mud, sand, and rainwater from entering the cylinder as the piston rod retracts.
2. Rod Seal: Prevents hydraulic fluid from leaking outward along the piston rod.
3. Piston Seal: Installed on the piston to prevent internal fluid bypass (internal leakage) between the two chambers of the hydraulic cylinder under high pressure.
4. Wear Rings / Guide Bands: Absorb lateral loads and prevent direct metal-to-metal contact between the piston rod and the cylinder barrel.
5. O-Rings & Back-up Rings: Provide auxiliary high-pressure sealing at static connection points, such as the end cap.

Symptoms of Failure
1. External oil leakage ("weeping" or "dripping"): During the operation of the boom or bucket cylinder, a thick layer of hydraulic oil accumulates on the surface of the piston rod; in severe cases, oil may even drip down. This is caused by wear or scratches (from hard objects) on the dust seal and main shaft seal.
2. Cylinder "boom drift" / sluggish operation (severe internal leakage): After the bucket is fully loaded with material, the boom slowly descends under its own weight even when the control lever is not being operated ("boom drift"). This occurs because the internal piston seal is damaged, allowing oil to leak directly from the high-pressure chamber to the low-pressure chamber, thereby preventing the maintenance of consistent hydraulic lifting force.
3. High-temperature degradation or oil quality deterioration: If the equipment operates for extended periods under extreme overload conditions or with excessively high hydraulic oil temperatures, the rubber of the seals can harden, become brittle, or even crack. Losing its elasticity in this way leads to extensive oil leakage.

DETAILS

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