CATEngine Parts

3E7857 Drive As — Cat 120H 120H ES

This is a Drive Assembly, a critical component responsible for transmitting power from the engine or transmission to the wheels or tracks. It is engineered to meet stringent durability standards, ensuring reliable operation under heavy loads and demanding conditions, unlike worn units that exhibit excessive play or noise. Symptoms of a failing drive assembly include grinding noises during operation, noticeable vibration, or a complete loss of drive.

Drive As – Part No 3E7857 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine 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

ispatch before 3 PM IST.', };

Related CAT Parts

From the same category — may also be needed

148782-103-2081
Turbocharger
7e3428lK
Engine Parts Component
7Y0219
Gear Coupler
3979294
Engine Parts Component
142-8879
Oil Cooler
2775774
Core As-Oil Cooler

Browse all CAT Engine 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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeDrive Assembly
MaterialForged Steel, Hardened Gears
ApplicationVehicle Drivetrain
Service LifeReplace as needed based on wear and performance
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

A failing drive assembly may initially present as a subtle increase in drivetrain noise or a slight looseness in the drive line. If ignored, this can progress to more significant vibrations, difficulty in engaging gears, or a noticeable reduction in power to the wheels. The ultimate consequence of continued operation is potential drivetrain component damage and loss of mobility.

Installation Tip

Ensure all mounting surfaces are clean and free of old gasket material or debris before installing the new drive assembly. Avoid reusing old fasteners, as they may be stretched or weakened.

Service Note

Inspect the differential and axle seals for leaks and check the condition of the drive shafts and U-joints.