Komatsu Part CAP 195-30-71251

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Product Overview

The 195-30-71251 CAP is a genuine Komatsu OEM replacement cap. Caps seal fluid reservoirs, fill openings, inspection ports, and vent points throughout your machine — keeping oil, coolant, and fuel inside and dirt, water, and air outside.

Part Number: 195-30-71251 Part Name: CAP Part Type: OEM Komatsu Replacement Component Availability: In stock

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When Caps Fail

Caps fail most commonly because the gasket or O-ring that provides the seal degrades — hardening from heat, cracking from age, or taking a compression set that prevents it from filling the gap between the cap and the opening. The mechanical connection also fails — threads strip or cross-thread, bayonet lugs wear, and plastic components crack from overtightening or impact. A cap that doesn't seal allows moisture to enter the system, which degrades the oil or fluid; allows dirt to enter, which accelerates component wear; and allows fluid to escape, which creates leaks and potential environmental contamination.

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When to Replace

• Fluid or vapor escaping past the cap — wetness or staining around the cap rim
• The gasket or O-ring is hardened, cracked, flattened, or missing
• Threads are stripped, crossed, or damaged — the cap won't tighten securely or consistently
• The cap body is cracked or deformed, especially at the drive surface or lip
• The pressure/vacuum relief function (if equipped) is no longer operating correctly

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Installation

1. Confirm 195-30-71251 in your Komatsu catalog
2. Clean the fill neck, port, or opening — remove old gasket material and debris
3. Verify the gasket condition — replace separately if serviceable
4. Install the cap and tighten — feeling for the gasket to compress, not bottom out on metal
5. Check for leaks after the system reaches normal operating temperature and pressure

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Request a Quote

Need the Komatsu 195-30-71251 CAP? Contact us through the form or by phone, email, or WhatsApp. We respond within one business day.