3350003 XCMG GR2605 motor grader spline sleeve

Technical Parameters

• Model: 3350003
• Type: Internal spline sleeve / coupling spline sleeve
• Material: 20CrMnTi or 20CrNiMo high-strength alloy steel
• Spline form: Involute internal spline
• Heat treatment: Carburizing & quenching + low-temperature tempering
• Tooth surface hardness: HRC 58–64
• Spline accuracy: GB/T grade 6–7
• Surface treatment: Blackening for rust prevention
• Operating temperature: -40℃～120℃
• Transmission performance: High-torque transmission, shock-resistant, wear-resistant, high centering accuracy
• Fit mode: Precision matching with external spline shaft with proper clearance

Application Scenarios

• Between gearbox output and drive shaft
• Differential input shaft and main reducer gear connection
• Wheel reducer spline connection and drive shaft middle coupling
• Hydraulic pump power input spline interface

  Applied to heavy-duty, frequent reversing and high-shock transmission scenarios to ensure smooth and reliable power delivery.

Common Faults & Troubleshooting

• Spline wear & tooth spalling: Caused by long-term heavy load or poor lubrication. Replace 3350003 spline sleeve and check mating spline shaft.
• Excessive backlash & transmission noise: Severe spline pair wear. Replace spline sleeve and recalibrate assembly clearance.
• Tooth root crack & fracture: Caused by severe shock or overload. Replace spline sleeve immediately and check for transmission system seizure.
• Rust & seizure: Due to water intrusion and lubrication failure. Replace spline sleeve, clean spline shaft, and improve sealing & lubrication.