CATHydraulic Parts

163-9762 Hydraulic Main Pump — Cat Excavator 303 5

This is the main hydraulic pump responsible for generating the high-pressure flow required to operate the machine's functions. It is engineered to meet stringent OEM performance standards, ensuring reliable operation compared to a worn pump that may exhibit reduced flow or pressure. Operators may notice sluggish or unresponsive hydraulic controls, or a noticeable decrease in lifting or digging power when this pump begins to fail.

Hydraulic Main Pump – Part No 163-9762 – 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

};

Related CAT Parts

From the same category — may also be needed

2443304
Caterpillar Gear Pump-Hydraulic 2443304
1P9328
Straight
2064127
Spring-Valve
1902279
Pump Gp-Piston
1D4595
Cap Screw
6i4019
Caterpillar Valve Seat Insert (Inlet) 6I4019

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 TypeHydraulic Main Pump
MaterialCast Iron and Steel
ApplicationMain Hydraulic System
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing hydraulic main pump include a noticeable drop in system pressure and slower response times for hydraulic functions. If left unaddressed, the pump's performance will continue to degrade, leading to significantly reduced work capacity and potential overheating of the hydraulic system. Continued operation with a failing pump risks damage to other hydraulic components due to inadequate flow or pressure.

Installation Tip

Ensure the hydraulic reservoir is completely drained and flushed to remove any debris before installing the new pump. Avoid overtightening hydraulic line connections, as this can damage the fittings and lead to leaks.

Service Note

Inspect the hydraulic fluid and filter for contamination, and check all hydraulic hoses and seals for wear or leaks during pump replacement.