CATHydraulic Parts

3G5863 Gear Pump-Hydrualic — Cat 988

This is a hydraulic gear pump designed to supply pressurized fluid to the main hydraulic system of heavy machinery. It is manufactured to meet strict quality and performance standards, ensuring consistent operation, unlike a worn pump that may exhibit reduced flow or internal leakage. Operators may notice a lack of power in hydraulic functions, slow boom or bucket movements, or the hydraulic system failing to build adequate pressure when this pump is nearing the end of its service life.

Gear Pump-Hydrualic – Part No 3G5863 – 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

/script>

Related CAT Parts

From the same category — may also be needed

0967912
Hydraulic Component
6E1103
Caterpillar Cylinder As 6E1103
191-1384
Travel Motor Assembly
158-8987-126-1813
Hydraulic Oil Filter
6E3524
Caterpillar Gear Pump-Hydraulic 6E3524
2959426
Caterpillar Pump Gp-Ps 2959426

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 Gear Pump
MaterialHardened steel and aluminum alloys
ApplicationMain hydraulic system
Service LifeReplace based on performance or 4,000-6,000 hours
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing gear pump is often a noticeable decrease in the speed and power of hydraulic operations. If the issue is not addressed, the pump's internal wear will accelerate, leading to a significant loss of hydraulic system efficiency and potential overheating of the hydraulic fluid. Continued operation risks incomplete or erratic machine performance, impacting productivity and potentially causing strain on other hydraulic components.

Installation Tip

Before installing, ensure the hydraulic reservoir is clean and the suction strainer is free from debris to prevent immediate contamination. Never force the pump onto the drive shaft; ensure proper alignment to avoid damaging the shaft or pump coupling.

Service Note

Inspect the hydraulic filter element and check the hydraulic oil for any signs of metal particles.