CATFuel System

684497 Cap-Oil Filler — Cat 120K 120K 2

This oil filler cap is a vital seal for the engine's lubrication system, preventing contaminants from entering the crankcase while retaining lubricating oil. It is constructed from durable materials to ensure a secure fit and resistance to engine oils and heat, unlike a worn or missing cap that allows dirt and moisture ingress. Operators may notice increased oil consumption, internal engine contamination, or unusual engine noises if the oil filler cap is loose, damaged, or missing.

Cap-Oil Filler – Part No 684497 – CAT Spare Part
Part Specifications
BrandCAT
CategoryFuel System
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Use clean, filtered fuel — fuel injection components have micron-level tolerances. Prime fuel system before cranking to avoid dry-start damage. Replace fuel filter whenever servicing injection components. Calibrate injectors after replacement if equipment has ECU.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeOil Filler Cap
MaterialRubber and metal
ApplicationEngine crankcase lubrication system
Service LifeReplace if damaged or seal is compromised
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A loose or damaged oil filler cap might initially allow small amounts of dirt or moisture to enter the engine oil. Over time, this can lead to accelerated wear on internal engine components due to abrasive contaminants. If left unaddressed, significant contamination can degrade the oil's lubricating properties, leading to increased friction, overheating, and potential engine damage.

Installation Tip

Ensure the oil filler neck on the engine is clean and free of any debris or old gasket material before installing the new cap. Tighten the cap until it clicks or seats firmly, but do not overtighten, as this can damage the seal or the filler neck.

Service Note

Inspect the engine's oil level and condition, and check the crankcase breather system for blockages when replacing the oil filler cap.