CATEngine Parts

1400686H91 O-Ring Kit Komatsu® — Cat 320C 320D

This O-ring kit provides a selection of high-quality sealing rings essential for maintaining the integrity of hydraulic and engine systems. Manufactured to meet stringent industry standards, these O-rings offer superior resistance to wear, heat, and chemicals compared to degraded or cracked seals. Operators might observe fluid leaks, a drop in hydraulic pressure, or system malfunctions when these seals begin to fail.

O-Ring Kit Komatsu® – Part No 1400686H91 – 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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Engine Parts Component

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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
MaterialNitrile Rubber (NBR)
ApplicationHydraulic and Engine Systems
Service LifeReplace as needed during component service
CompatibilityKomatsu®, Caterpillar® specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The initial symptom of failing O-rings is typically a visible fluid leak at a connection point. If ignored, the leaks can worsen, leading to a gradual loss of system pressure and reduced component performance. Prolonged leakage can result in significant fluid loss, potential component damage, and unscheduled downtime.

Installation Tip

Ensure all sealing surfaces are meticulously cleaned and free of any burrs or debris before placing the new O-ring. Avoid using sharp tools to install the O-rings, as this can easily nick or cut the rubber.

Service Note

Inspect hydraulic hoses and fittings for signs of wear or cracking when replacing O-rings in the hydraulic system.