CATHydraulic Parts

4S6399 Straight — Cat 320C 320D

This straight hydraulic fitting is designed to connect hydraulic lines and components, ensuring a secure and leak-free flow of fluid within the system. Manufactured to meet stringent quality standards, it provides robust durability and reliable performance, unlike a worn or damaged fitting. Operators may notice hydraulic fluid leaks, a drop in system pressure, or erratic hydraulic function when this fitting fails.

Straight – Part No 4S6399 – CAT Spare Part
Part Specifications
BrandCAT
CategoryHydraulic 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

Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.

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

Part TypeHydraulic Fitting (Straight)
MaterialSteel alloy
ApplicationHydraulic system connection
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first sign of a failing straight hydraulic fitting is typically a visible hydraulic fluid leak. If left unaddressed, the leak can worsen, leading to a significant loss of hydraulic pressure and system performance. Continued operation with a leaking fitting risks environmental contamination and potential damage to hydraulic pumps due to low fluid levels.

Installation Tip

Ensure the threads on both the fitting and the receiving port are clean and undamaged before assembly. Do not overtighten the fitting, as this can strip the threads or damage the sealing surface.

Service Note

Inspect the connected hydraulic hose and the mating component's port for any signs of wear or damage.