WESPC 4181A026 903-019 piston ring kit for Perkins 1004-series diesel engines

Application

WESPC 4181A026 / 903-019 piston ring kit for Perkins 1004-series diesel engines. Commonly used in FG Wilson generator sets, agricultural tractors, and construction machinery. Designed to restore compression, control oil consumption, and ensure optimal combustion efficiency during piston overhaul or engine rebuild.

Generator sets

Suitable for Perkins-powered gensets rated 80–150 kVA. Maintains ring-to-wall contact under continuous duty, reducing blow-by and improving fuel economy.

Industrial & agricultural equipment

Applied in Massey Ferguson tractors, JCB loaders, and other OEM platforms using Perkins 1004.40 / 1004.40T engines. Supports long-term engine performance in demanding operating environments.

Technical specifications

Part number: 4181A026 / 903-019

Function: piston ring kit (includes top compression rings, intermediate ring, and oil control ring)

Material: ductile cast iron with nitrided and chrome-faced surfaces for wear resistance

Compatible engines: Perkins 1004.40 / 1004.40T (AJ, AK, AM, AP, AQ builds)

Bore size: standard (100.00 mm)

Warranty: 12 months

Interchange part number

4181A026; 903-019; verified fitment for Perkins 1004-series engines in generator sets and industrial/agricultural machinery