71659 XCMG GR2605 motor grader sealing ring

Technical Parameters

• Model: 72633
• Type: O-ring / Cable seal / Universal shaft-bore seal
• Material: NBR Nitrile Rubber (standard oil-resistant), FKM Fluororubber (high-temperature optional)
• Hardness: 70±5 Shore A
• Temperature Range: -30℃～120℃ (NBR); -20℃～200℃ (FKM)
• Working Pressure: ≤10 MPa (static sealing)
• Compatible Media: Hydraulic oil, gear oil, engine oil, transmission oil, cooling water
• Structure: Unskeleton / metal skeleton, single/double lip, round cross-section, high resilience
• Protection Rating: IP65 (dustproof, splash-proof)

Application Scenarios

• Shaft/flange seals for gearboxes, transfer cases, drive axles, wheel reducers
• Static seals for hydraulic cylinders, valve blocks, pumps, pipe joints
• Through-wall seals for body cables, shift cables, brake lines (mud-proof)
• Bore seals for engines, fuel systems, cooling systems

  Used for static/low-speed dynamic sealing to solve oil leakage and external contamination.

Common Faults & Troubleshooting

• Oil Seepage/Leakage: Rubber aging, hardening, deformation, damage → Replace 72633, clean seal groove, check shaft/bore for scratches.
• Seal Failure: Installation distortion, cutting, insufficient compression → Install correctly, ensure no distortion, match groove depth with cross-section.
• Hardening/Cracking: Long-term high temperature, oil corrosion → Upgrade to FKM 72633, improve cooling and oil quality.
• Contamination Ingress: Seal dislodgement, damage → Check installation security, replace new seal, clean cavity.