CATHydraulic Parts

1D4590 Cap Screw — Cat 320C 320D

This cap screw is a critical fastener used in various hydraulic system assemblies to secure components and maintain structural integrity. It is manufactured to meet stringent Caterpillar specifications, ensuring superior strength and durability compared to worn or damaged fasteners that may exhibit stretched threads or weakened heads. Operators may notice hydraulic leaks or loose componentry if these screws fail, potentially leading to reduced system performance.

Cap Screw – Part No 1D4590 – 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 TypeCap Screw
MaterialHardened Steel
ApplicationHydraulic System Assembly
Service LifeReplace as needed or during major component overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing cap screw may include minor hydraulic fluid seepage around the secured component. If left unaddressed, the leak can worsen, and the component may begin to vibrate or shift, compromising system efficiency. Continued operation with a compromised fastener risks significant hydraulic system damage and potential component detachment.

Installation Tip

Ensure the mating threads in the component are clean and free of debris before installation. Avoid overtightening, as this can strip the threads or damage the screw head.

Service Note

Inspect the sealing surfaces and gasket or O-ring for the component being secured when replacing cap screws.