1. Quick Details of  seal 198-30-73320 :

2. 198-30-73320 picture:

3. Service ring part no. :

4. FAQ

Q1: What are Komatsu dust seals, and where are they used?

A:   Komatsu dust seals (also called dust rings or wipers) are rubber or polyurethane sealing components that block dust, dirt, water, and debris from entering critical machine parts like hydraulic cylinders, bearings, track rollers, idlers, and engine compartments. They’re widely used on excavators (PC series), bulldozers (D series), loaders (WA series), and mining equipment.

Q2: Why are dust seals important for Komatsu machines?

A:  Dust causes abrasive wear, clogs filters, contaminates oil, and damages cylinders/pistons. Failed dust seals lead to:

• Premature hydraulic cylinder scoring & leaks;
• Fast track/bearing wear;
• Engine abrasion (silica dust);
• Higher maintenance & downtime costs.

Q3: How do I know if my Komatsu dust seal is bad?
A:  Watch for these symptoms:

• Hydraulic oil leaks around cylinder ends
• Dust buildup inside hydraulic components
• Scratches on cylinder rods
• Uneven or noisy track/roller operation
• Reduced machine performance & increased oil changes

Q4: How often should I replace Komatsu dust seals?
A:

• Standard conditions: Every 2,000–3,000 hours or during cylinder rebuilds
• Dusty/mining environments: Every 1,000–2,000 hours (more frequent inspection)
• Air filter dust indicators: Clean/replace when yellow piston enters red zone

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