WESPC 4133L508 Thermostat for Perkins 1103 1104 Series Engines Fits Machinery

Application:

WESPC 4133L508 thermostat assembly is designed for Perkins 1100 series 3- and 4-cylinder diesel engines, including models 1103A-33T, 1103A-33TG1, 1104C-44, and 1104C-44T. This left-hand configuration assembly replaces previous part number 2485C041 and includes the thermostat, connection housing, and sealing components. It regulates coolant flow based on engine temperature, ensuring rapid warm-up and maintaining thermal stability during continuous operation. The thermostat begins to open at 82°C (180°F), supporting efficient heat dissipation and protecting the engine from overheating in demanding environments.

Generator sets:

Commonly installed in 50–150 kVA diesel generator platforms powered by Perkins 1103 and 1104 series engines. The WESPC 4133L508 thermostat assembly ensures consistent coolant circulation, contributing to fuel efficiency and reduced wear. It supports stable combustion and long-term reliability in commercial backup systems, telecom power modules, and mobile gensets operating under variable load conditions.

Construction machinery:

Suitable for JCB, Terex, and Volvo CE equipment powered by Perkins 1100 series engines. The thermostat assembly maintains optimal engine temperature in high-vibration environments, supporting torque output and mechanical integrity. Verified applications include JCB 3CX, Terex TLB840, and Volvo BL60 loaders, where thermal control is essential to uptime and engine longevity.

Agricultural equipment:

Applied in Massey Ferguson and Landini tractors requiring long service intervals and stable engine operation. The WESPC 4133L508 thermostat assembly supports rapid warm-up and consistent temperature regulation during extended field operations, reducing fuel consumption and protecting internal components from thermal cycling. It ensures reliable performance in MF 440, MF 470, and Landini Powerfarm series tractors equipped with Perkins 1104C engines.

Industrial systems:

Installed in stationary pumps, compressors, and hydraulic power units using Perkins 1100 series engines. The thermostat assembly supports continuous operation by regulating coolant flow and maintaining lubrication integrity. Its robust design ensures performance in demanding industrial environments with frequent start-stop cycles and elevated ambient temperatures.

Technical specifications:
Part number: 4133L508
Supersedes: 2485C041
Configuration: left-hand thermostat assembly
Compatible engines: Perkins 1103A-33T, 1103A-33TG1, 1104C-44, 1104C-44T
Opening temperature: 82°C (180°F)
Material: corrosion-resistant brass and stainless steel
Assembly includes: thermostat, connection housing, sealing components
Dimensions: approx. 110 mm × 85 mm × 65 mm
Weight: approx. 0.9 kg
Packaging: neutral carton box, 20 pcs/carton
Warranty: 12 months manufacturer warranty

Material & performance features:

Manufactured using high-grade brass and stainless steel for corrosion resistance and thermal stability. The wax element is engineered for precise temperature response, ensuring reliable coolant flow control under varying operating conditions. The housing and sealing components are designed to withstand thermal expansion and mechanical stress, supporting long-term durability. Produced under ISO-certified quality control standards to ensure consistent performance across all applications.

Interchange part number:

4133L508; verified fitment for Perkins 1103 and 1104 series engines. Compatible with standard maintenance and rebuild procedures across generator, construction, agricultural, and industrial applications.