WESPC 4133L503 4133L509 Thermostat for Perkins 1103 1104 Diesel Engines - 82°C Opening Temperature, 110mm Size

Designed for Perkins 1100 series 3- and 4-cylinder diesel engines, including models 1103C-33T, 1104C-44, and 1104C-44T. These thermostat assemblies regulate coolant flow based on engine temperature, ensuring rapid warm-up and maintaining thermal stability during continuous operation.

Commonly installed in 50-150 kVA diesel generator platforms powered by Perkins 1103 and 1104 series engines. Ensures consistent coolant circulation, contributing to fuel efficiency and reduced wear in commercial backup systems, telecom power modules, and mobile gensets.

Suitable for JCB, Terex, and Volvo CE equipment including JCB 3CX, Terex TLB840, and Volvo BL60 loaders. Maintains optimal engine temperature in high-vibration environments, supporting torque output and mechanical integrity.

Applied in Massey Ferguson and Landini tractors including MF 440, MF 470, and Landini Powerfarm series. Supports rapid warm-up and consistent temperature regulation during extended field operations.

Installed in stationary pumps, compressors, and hydraulic power units using Perkins 1100 series engines. Ensures performance in demanding industrial environments with frequent start-stop cycles.

4133L509 and 4133L503 are verified fitment replacements for Perkins 1103 and 1104 series engines. Compatible with standard maintenance and rebuild procedures across generator, construction, agricultural, and industrial applications.