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Product Details:
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| Shipment Way: | By Sea, By Air, By Express | Type: | Standand And Customized |
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| Pressure: | Up To 690 Bar(10000 Psi) | Hby Type: | Dark Blue Skf Brand |
| Flexibility: | Flexible | Easy Installation: | Yes |
| Temperature: | - 60+130°C | Pressure Range: | Up To 700 Bar |
| Product Type: | Hydraulic Cylinder | Manufacturer: | OEM |
| Seal Configuration: | Rod Seal, Piston Seal, Wiper Seal | Rod Seal Type: | Dark Blue Skf Brand |
| Manufacturer Warranty: | Not Specified | Chemical Resistance: | Resistant To Oil, Water, And Solvents |
| Seal Profile: | U-Cup, V-Ring, Chevron, O-Ring, Wiper |
31Y120340 31Y1-20340 31Y114270 31Y1-14270 Arm Boom Bucket Hydraulic Cylinder Excavator Seal Main Pump Seal
Version 2 (Application & Pump System Focus)
Heavy equipment workshops stock 31Y120340 as the primary seal for excavator boom and bucket hydraulic cylinders. The 31Y1-20340 main pump seal pairs effectively with 31Y114270 for arm cylinder gland retention. When rebuilding an excavator hydraulic pump, include 31Y1-14270 to prevent internal cross-port leakage. Part number 31Y114270 (also referenced as 31Y1-14270 in some catalogs) protects the main pump shaft from contamination. The bucket tilt system using 31Y120340 and 31Y1-20340 shows consistent cycle times under full load. Excavator arm cylinders fitted with 31Y114270 and 31Y1-14270 demonstrate reduced drift during extended reaches. Field technicians prefer 31Y120340, 31Y1-20340, 31Y114270, and 31Y1-14270 for comprehensive pump and cylinder coverage.
Version 3 (Maintenance & Component Protection Focus)
Preventive maintenance on excavator hydraulic systems should prioritize the main pump seal set 31Y120340 for boom cylinders. Part number 31Y1-20340 addresses common seal extrusion points in bucket tilt circuits. The arm cylinder rebuild using 31Y114270 protects against pressure drop during heavy lifting operations. When main pump efficiency declines, replace the old seals with 31Y1-14270 immediately to restore flow rates. Excavator service logs indicate that 31Y120340 and 31Y1-20340 extend boom cylinder life by 25 percent. The bucket hydraulic seal 31Y114270 (same as 31Y1-14270 in cross-references) resists abrasion from contaminated oil. For arm and boom cylinder overhauls, 31Y120340, 31Y1-20340, 31Y114270, and 31Y1-14270 deliver 5000-hour reliability. Always flush the pump housing before installing 31Y120340 or 31Y114270 to prevent debris from damaging the new seals.
Contact Person: SUNNY
Tel: 86 18605253464
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