CATHydraulic Parts

1D4645 Cap Screw — Cat 320C 320D

This cap screw is a critical fastener used to secure hydraulic components, ensuring system integrity and preventing leaks. It meets stringent Caterpillar specifications for material strength and thread form, offering superior durability compared to worn or stripped fasteners. Failure is often indicated by loose components, hydraulic fluid seepage, or unusual noises from the affected system.

Cap Screw – Part No 1D4645 – 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 Fastening
Service LifeReplace as needed or during major component overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A loose cap screw may initially cause minor hydraulic fluid weeping around the sealed joint. If left unaddressed, the leak can worsen, leading to a significant loss of hydraulic pressure and potential component damage. Continued operation with a compromised seal risks contamination of the hydraulic system and reduced equipment performance.

Installation Tip

Ensure the mating surfaces of the component and housing are clean and free of debris before installation. Avoid cross-threading by carefully starting the screw by hand before using any tools.

Service Note

Inspect the threads of the tapped hole and the mating component surface for damage or wear before installing a new cap screw.