CATEngine Parts

220-3398 Hydraulic Valve — Cat 420D 420E

This hydraulic valve precisely controls fluid flow and pressure within the machine's hydraulic system, ensuring proper operation of actuators and implements. Manufactured to meet stringent OEM standards, it offers superior durability and sealing compared to worn or damaged valves, preventing internal leakage. Operators may notice sluggish or erratic implement movement, or a complete loss of hydraulic function when this valve fails.

Hydraulic Valve – Part No 220-3398 – 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 TypeHydraulic Control Valve
MaterialHardened Steel Alloy
ApplicationHydraulic System Control
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Erratic or slow hydraulic implement response is often the first sign of a failing valve. If ignored, the issue can progress to inconsistent operation or complete loss of hydraulic power to specific functions. This can lead to reduced productivity and potential damage to other hydraulic components due to improper fluid control.

Installation Tip

Ensure the hydraulic system is properly depressurized before disconnecting any lines to prevent injury and fluid loss. Avoid overtightening fittings, as this can damage the valve body or threads.

Service Note

Inspect the hydraulic filter and fluid for contamination when replacing this valve, as debris can cause premature failure.