O-Ring Pump Body

The Peterson Fluid O-Ring Pump Body (Part Number 2-040) is a precision elastomer seal designed for oil pump gear assemblies and hydraulic systems. This 0.063-inch thick rubber o-ring features an inner diameter of 2.892 inches and an outer diameter of 3.09 inches, engineered to create reliable fluid containment in high-pressure pump applications where consistent sealing performance is critical to system integrity.

The cross-section thickness of 0.063 inches provides optimal balance between squeeze tolerance and resilience, allowing the seal to maintain contact with pump body grooves during both static and dynamic conditions. Peterson Fluid o-rings are manufactured to exacting dimensional tolerances to ensure proper fit within standard SAE and metric pump cavities. The rubber compound is formulated to resist mineral oil, synthetic blends, and petroleum-based hydraulic fluids across a broad operating temperature range, making this seal suitable for automotive, industrial, and marine pump systems where dimensional consistency directly impacts leak prevention and service life.

Technicians, rebuilders, and maintenance professionals rely on this o-ring when restoring oil pump assemblies in engines, transmissions, and hydraulic power units. Whether replacing a worn seal during routine pump service, diagnosing slow oil pressure loss, or assembling replacement gear pump bodies, this Peterson Fluid component provides the precision fit and material compatibility required for dependable performance. The lightweight design and compact dimensions make it practical for inventory in service shops, fleet maintenance facilities, and restoration projects where quality pump seals are essential to preventing costly leaks and extending equipment service intervals.