CATHydraulic Parts

0S1589 Cap Screw — Cat 320C 320D

This cap screw is a critical fastener used in various hydraulic system assemblies to secure components and maintain pressure integrity. It is manufactured to meet stringent material and dimensional standards, ensuring a reliable seal and preventing leaks that would occur with a worn or stripped fastener. Operators may notice hydraulic fluid leaks around the connection point or a loose component if this screw fails.

Cap Screw – Part No 0S1589 – 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.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

M IST.', };

Related CAT Parts

From the same category — may also be needed

6i4019
Caterpillar Valve Seat Insert (Inlet) 6I4019
1888640*
Hydraulic Component 1888640* 1888640* 1888640*
7W1636
Guide-Valve
5I8401(7)
Hydraulic Component 5I8401(7) 5I8401(7) 5I8401(7)
1457390
Hydraulic Component
6i1713
Caterpillar Valve Seat Insert (Gas) 6I1713

Browse all CAT Hydraulic Parts →

Ship This Part To Your Location

DubaiSaudi ArabiaNigeriaKenyaSouth AfricaBangladeshMalaysiaGhanaQatarEgypt
India
MaharashtraGujaratTamil NaduRajasthanKarnatakaTelangana

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 TypeCap Screw
MaterialHardened Steel
ApplicationHydraulic System Assembly
Service LifeReplace as needed or during hydraulic system maintenance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing cap screw is often a slow hydraulic fluid leak around the connection point. If ignored, the leak may worsen, leading to a gradual loss of hydraulic pressure and system performance. Continued operation with a compromised fastener could result in component dislodgement or significant fluid loss.

Installation Tip

Before installing, ensure the mating surfaces are clean and free of debris to achieve a proper seal. Avoid over-tightening, as this can strip the threads or damage the component.

Service Note

Inspect the sealing surface and any associated gaskets or O-rings for wear or damage when replacing this cap screw.