CATHydraulic Parts

3W8398 Hydraulic Component — Cat 963 963b

This is a CAT Hydraulic Component, part number 3W8398, integral to the machine's hydraulic system for transmitting power and control. Manufactured to meet CAT's rigorous standards, it ensures reliable operation and durability under demanding conditions. Symptoms of failure can include jerky hydraulic movements, loss of system pressure, or audible leaks within the hydraulic circuit.

Hydraulic Component – Part No 3W8398 – 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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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

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 Component
MaterialSteel, rubber seals
ApplicationHydraulic system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of failure may include a slight hesitation in hydraulic response or minor fluid seepage. If ignored, the problem can progress to significant loss of hydraulic power, inability to operate attachments, and potential system overheating. Continued operation risks damage to the hydraulic pump and cylinders.

Installation Tip

Ensure all sealing surfaces are perfectly clean and dry before fitting the component to prevent leaks. Avoid applying excessive force during installation, which could damage the component or its seals.

Service Note

When replacing this hydraulic component, it is recommended to inspect the hydraulic fluid level and condition, and check the hydraulic filter for clogging.