CATEngine Parts

1400688H91 O-Ring Kit Komatsu® — Cat 320C 320D

This O-ring kit provides a selection of high-quality sealing rings essential for preventing leaks in various hydraulic and engine systems, ensuring proper fluid containment and system integrity. Constructed from durable NBR rubber compounds that resist oil, heat, and pressure, these O-rings offer superior sealing performance and longevity compared to worn or cracked seals that allow fluid seepage. Operators may notice external fluid leaks, reduced hydraulic pressure, or internal system contamination when these O-rings fail.

O-Ring Kit Komatsu® – Part No 1400688H91 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

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

Part TypeO-Ring Kit
MaterialNBR Rubber
ApplicationHydraulic and engine systems
Service LifeReplace as needed based on inspection
CompatibilityKomatsu® specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first sign of O-ring failure is typically a visible fluid leak around a fitting, seal, or cylinder. If not addressed, the leak will worsen, potentially leading to a significant loss of hydraulic pressure or fluid, and increased contamination within the system. Persistent leaks can cause damage to surrounding components and lead to operational downtime.

Installation Tip

Always lubricate O-rings with a compatible fluid or lubricant before installation to prevent tearing or damage during insertion. Ensure the groove is clean and free of any debris that could compromise the seal.

Service Note

Inspect all associated hydraulic lines, fittings, and cylinder seals for signs of wear or damage that may have contributed to the O-ring failure.