Kobelco excavator oil seal kits for SK100-5 and SK100-6, including 2438U1123R300 (boom), 2438U1125R300 (arm) and 2438U1131R300 (bucket). Made of high-quality NBR and PU materials, these seals feature excellent oil resistance, wear resistance and anti-aging performance. They fit original cylinder sizes perfectly, effectively prevent hydraulic leakage under high pressure. Ideal for routine maintenance and repair. Easy to install, reliable performance and long service life, a cost-effective replacement for original parts.
| Part Number | Cylinder Position | Fit Model | Bore | Rod |
|---|---|---|---|---|
| 2438U1123R300 | Boom | SK100-5, SK100-6 | 100 mm | 70 mm |
| 2438U1125R300 | Arm | SK100-5, SK100-6 | 115 mm | 75 mm |
| 2438U1131R300 | Bucket | SK100-5, SK100-6 | 95 mm | 65 mm |
| Part Number | Cylinder Type | Compatible Models | Rod/Bore (mm) |
|---|---|---|---|
| 2438U1123R300 | Boom | SK100-5, SK100-6 | 70/100 |
| 2438U1125R300 | Arm | SK100-5, SK100-6 | 75/115 |
| 2438U1131R300 | Bucket | SK100-5, SK100-6 | 65/100 |
| 2438U1102R300 | Boom | SK200-3, SK200-4, SK210-4 | 100/140 |
| 2438U1104R300 | Arm | SK200 III/IV, SK200LC III/IV | 100/145 |
| 2438U1109R300 | Bucket | SK200LC III/IV | 80/120 |
| 2438U1133R300 | Boom | MD140C, SK115DZ-4, SK120-5/6 | 70/100 |
| 2438U1170R300 | Boom | SK300-2/3, SK330-4 | 120/170 |
| 2438U1172R500 | Bucket | SK300-2/3, SK330-4 | 100/140 |
| 2438U996R300 | Boom | SK907-2, K907, K907LC, MD200BLC | 60/90 |
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