CATHydraulic Parts

1D4639 Cap Screw — Cat 320C 320D

This is a high-strength cap screw designed for critical fastening applications within hydraulic systems and other heavy-duty equipment assemblies. It is manufactured from premium steel alloys to meet stringent tensile strength and durability standards, ensuring it resists loosening and fatigue better than standard fasteners. Operators might notice fluid leaks or loose components if this fastener fails or becomes dislodged.

Cap Screw – Part No 1D4639 – 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
MaterialHigh-Tensile Steel Alloy
ApplicationHydraulic Component Mounting, General Assembly
Service LifeReplace if removed or damaged
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A loose or broken cap screw may initially cause minor vibrations or slight operational irregularities in the connected component. If the fastener is lost, the connected parts can shift, potentially leading to fluid leaks or premature wear on mating surfaces. The worst-case scenario involves the failure of the assembly due to the loss of critical structural integrity.

Installation Tip

Always use a thread-locking compound appropriate for the application to prevent loosening due to vibration. Ensure the mating threads are clean and free of damage before installation.

Service Note

Inspect the condition of the threaded hole and the component being fastened for any signs of wear or damage.