Cummins NT855 engine fan hub and fan belt tensioner assembly 4915200 Series is a cooling system component for Chongqing Cummins NT855 diesel engine, widely installed on Shantui bulldozers. It maintains proper tension of the fan belt, prevents belt slipping, guarantees stable fan rotation and engine heat dissipation.

Part numbers in this series:
4915200, 3250937

Fits: Chongqing Cummins NT855 Diesel Engine, Shantui Bulldozer
Position: Engine cooling fan drive system

What you are ordering
Price is per fan hub / belt tensioner assembly. All part numbers are separate variants, please select the correct PN from variant options. These assemblies are not interchangeable. Different part numbers have different pulley grooves and mounting dimensions. Wrong selection will cause belt slipping, overheating and belt damage.

Specifications
Type: Fan Hub & Fan Belt Tensioner Assembly
Material: Cast iron + bearing steel
Feature: Automatic tension adjustment, wear-resistant
Package: Neutral packing or wooden case

When to replace
Replace the tensioner assembly when belt slipping, abnormal rattling noise, bearing seizure, belt deviation or fan hub shaking occurs.

Fitting notes
Strictly confirm part number and bulldozer model before ordering. Adjust belt tension after installation. Do not over-tighten the belt to avoid premature bearing failure. Follow Cummins service manual for assembly. If you are not sure which tensioner matches your engine, send us engine serial number for confirmation.

Warranty and shipping
Covered by a 12-month warranty against manufacturing defects. Orders are dispatched within 3–7 business days; DHL / FedEx delivery takes 5–10 business days. Tracking number is sent as soon as the parcel leaves our warehouse.

Note: manufacturer names and part numbers are used for identification and cross-referencing only. We are an independent aftermarket supplier and are not affiliated with, or authorised by, the original manufacturer. Please verify the part number against your engine's parts catalogue before ordering — our team is happy to help if you send us your engine model or serial number.