WESPC U5LL0039 piston kit for Perkins 1004.4T turbocharged diesel engines

Application

WESPC U5LL0039 piston kit for Perkins 1004.4T turbocharged diesel engines. Commonly used in generator sets, agricultural tractors, and construction machinery. Restores compression, oil control, and combustion efficiency during in-frame or major overhauls. Alloy piston with anodized crown and nitrided/chrome-faced rings ensures durability under sustained high-load operation.

Generator sets

Suitable for Perkins-powered gensets in the 1004.4T range, delivering stable sealing and reduced oil consumption in both prime and standby duty cycles.

Industrial & agricultural equipment

Applied in Massey Ferguson tractors, loaders, and other OEM platforms using Perkins 1004.4T engines. Graphite-coated skirt reduces friction; ring pack maintains sealing under heavy-duty cycles.

Technical specifications

Part number: U5LL0039 Function: piston kit (piston, rings, pin, circlips) Material: alloy piston with anodized crown; ductile cast iron rings with nitrided top and chrome oil control Compatible engines: Perkins 1004.4T Bore size: standard (100.00 mm) Warranty: 12 months

Interchange part number

U5LL0039; 3135J258; 4223849M91 — verified fitment for Perkins 1004.4T engines in FG Wilson gensets and industrial/agricultural machinery