Komatsu Part CAP 195-03-65990
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Product Overview
The 195-03-65990 CAP is a genuine Komatsu OEM replacement cap from the 195 prefix series. Caps seal openings, ports, and reservoirs on your machine — preventing fluid loss, blocking contamination, and maintaining system pressure or vacuum where applicable.
Part Number: 195-03-65990 Part Name: CAP Part Type: OEM Komatsu Replacement Component Availability: In stock
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When to Replace
- Fluid or vapor escaping past the cap seal — visible wetness or staining
- The gasket or sealing element is hardened, cracked, or missing
- Threads are damaged or the cap no longer tightens securely
- The cap body is cracked or deformed
- A pressure or vacuum relief mechanism (if equipped) no longer functions
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Installation
- Confirm 195-03-65990 in your Komatsu parts catalog
- Clean the opening thoroughly — old seal residue and debris prevent sealing
- Check the gasket — replace separately if needed
- Install and tighten — compress the gasket without overtightening
- Verify seal after the system reaches operating conditions
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Request a Quote
Need the Komatsu 195-03-65990 CAP? Contact us through the form or by phone, email, or WhatsApp. We respond within one business day.

