Yuchai 4R Series 38kVA Diesel Generator, Emergency Standby Power for Small Farms

Product Overview

WOPUSAI Yuchai 4R series 38kVA open‑frame diesel generator set is assembled with genuine Yuchai 4R four‑cylinder water‑cooled diesel engine, matched with Foshan Statum STC‑30 brushed self‑excitation alternator. Running at 1500rpm 50Hz, it provides stable 400V/230V three‑phase power supply. Adopting direct‑injection fuel supply, mechanical speed governing and natural air intake, with 24V DC electric starting system. This compact‑size unit is cost‑effective for small‑scale standby power, construction temporary power and retail‑level generator rental projects.

‑ Product Series: Yuchai 4R Series 38kVA Diesel Generator Set

‑ Apparent Power: 38kVA, 50Hz, 1500rpm

‑ Engine: Yuchai 4R series diesel engine, Model 4R120D‑40

‑ Alternator: Foshan Statum STC‑30 Brushed Self‑Excitation Alternator

‑ Rated Voltage: 400V/230V three‑phase

‑ Starting Mode: DC 24V electric start

‑ Application: Small‑factory backup power, construction site temporary power, generator rental, rural emergency power supply

Product Showcase

Yuchai 4R Series 38kVA Open‑Type Diesel Generator Complete open‑structure genset combining Yuchai 4R water‑cooled diesel engine and STC brushed self‑excitation synchronous alternator.

The 4‑cylinder Yuchai 4R engine features 3.4L displacement, natural aspiration, direct‑injection fuel system and mechanical governor. It uses 40℃ standard water‑cooled circulation cooling system and supports 24V DC electric start for quick startup. The STC brushed alternator comes with E‑class insulation, IP22 protection grade, star‑type connection and AVR automatic voltage regulation, power factor 0.8 lag. Brushed‑type structure brings low procurement cost and convenient local repair. Compact overall dimension, easy for transportation and on‑site installation.

Key Specifications

Core Advantages

1. Compact & Mature Yuchai 4R Four‑Cylinder Power Unit Original Yuchai 4R engine with 3.4L displacement, natural‑aspiration direct‑injection design. Stable performance, moderate fuel consumption at 220g/KW/h. Small footprint, suitable for space‑limited installation scenarios.
2. Cost‑Effective STC Brushed Self‑Excitation Alternator Classic STC brushed alternator with AVR automatic voltage stabilization. E‑class insulation and IP22 protection meet general‑purpose working conditions. Carbon‑brush structure enables low spare‑part price, most repair shops can complete carbon‑brush replacement locally, ideal for cost‑sensitive projects.
3. 24V DC Electric Start & Stable Water‑Cooling System 24V DC electric starting realizes one‑key startup. Standard water‑cooled circulation system keeps proper working temperature during continuous running. Mechanical governor has simple structure, fewer electronic components, strong anti‑interference ability for harsh site environment.
4. Small Footprint, Easy Transport & Installation Overall dimension 16506501150mm, unit weight only 700kg. Light‑weight among same‑power water‑cooled diesel gensets, convenient for truck transportation and on‑site hoisting. Open‑frame layout makes daily inspection and filter replacement simple.
5. Economical Solution For General‑Purpose Power Demand Balanced performance and price positioning. Targeted for small‑factory standby, construction temporary power and generator rental fleet. Global circulating spare‑parts reduce after‑service difficulty.

🎯 Application Scenarios

‑ Small factory & workshop emergency backup power ‑ Temporary power supply for construction sites ‑ Generator rental business fleet equipment ‑ Rural area and remote site off‑grid power ‑ Retail shops and small‑commercial premise standby power

⚙️ Optional & Customization

‑ Silent canopy / rain‑proof canopy optional ‑ ATS automatic transfer switch for auto‑start function ‑ Base fuel tank, basic control panel upgrade optional ‑ Supply scope: Complete open‑type generator set

Custom Workflow: Requirement Confirmation → Quotation → Production → Pre‑shipment Running Test → Delivery

📦 Packaging Standards

‑ Packaging: Bare unit with anti‑rust treatment; export wooden case optional ‑ Comply with ISPM‑15 shipping requirement for sea & land transportation ‑ Attached documents: Operation manual, factory test report, packing list

🚛 Shipping & Delivery

‑ Full cargo insurance, whole‑process logistics tracking ‑ Heavy‑duty fixation for ocean transportation ‑ Complete customs‑declaration documents for cross‑border trade ‑ Standard production lead‑time: 10‑20 working days

🏢 Brand Introduction

WOPUSAI, located in Foshan, Guangdong, engages in generator assembly and full‑range generator aftermarket spare‑parts. We supply multiple series Yuchai diesel gensets, covering both brushed and brush‑less alternator versions, together with filters, AVR regulators, instrument boxes and control boxes. Every finished unit passes strict no‑load & load running test before shipment. We provide complete power solutions and professional technical support for global distributors and end‑users.