1. Quick Details of  seal 198-30-31240 :

2. Parts on group :

2. 198-30-73320 picture:

4. Service ring part no. :

5. 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 to install Komatsu dust seals correctly?
A:

• Clean housing & cylinder rod thoroughly.
• Lubricate seal & rod with clean hydraulic oil.
• Install with dust lip facing outward (away from oil).
• Use proper tools; avoid twisting/tearing.
• Replace in sets (seal kits) for best results.

Q4: What causes premature dust seal failure?
A:

• Extreme dust/mining conditions
• Improper installation
• Damaged cylinder rods (scratches/pitting)
• High temperatures or chemical exposure
• Worn housings or misalignment

6. Exhibition & Warehous

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