190-5796 Lower Radiator Hose for Caterpillar 325C E325C 322C

190-5796 Lower Radiator Hose for Caterpillar 325C E325C 322C

The 190-5796 lower radiator hose (also referenced as 1905796, CA1905796, or lower water hose) is a molded replacement coolant hose designed for Caterpillar 325C (E325C) and 322C (E322C) series excavators powered by the Cat 3126 and 3126B diesel engines. Installed at the bottom of the radiator assembly, it connects the lower radiator outlet to the engine water pump inlet to return cooled fluid into the engine block.

Manufactured with a 49 mm (1.93 in) inner diameter and factory-matched bend geometry, this fixed-length hose is molded from reinforced, heat-resistant EPDM rubber. Its multi-ply wall structure resists suction collapse under high water pump draw while standing up to continuous thermal cycling, engine vibration, and antifreeze chemicals.

Compatible Equipment & Serial Number Prefixes

Caterpillar 325C (E325C) | Caterpillar 325C L | Caterpillar 325C LN | Caterpillar 325C FM | Caterpillar 325C MH | Caterpillar 322C (E322C) | Caterpillar 322C L | Caterpillar 322C LN | Caterpillar 322C FM | Caterpillar M325C MH

According to Caterpillar cooling system parts documentation, part number 190-5796 fits the following equipment and machine serial number prefixes:

• Caterpillar 325C / 325C L / 325C LN Track Excavators: S/N AMH00001-UP, BKW00001-UP, BFE00001-UP (3126B Engine); CRB00001-UP, JLC00001-UP (3126 Engine)

• Caterpillar 325C FM Forest Machines & Material Handlers: S/N G1L00001-UP (3126B Engine); S2C00001-UP, DTF00001-UP (3126 Engine)

• Caterpillar 322C / 322C L / 322C LN Track Excavators: S/N HEK00001-UP (3126B Engine); DAA00001-UP, EMR00001-UP (3126 Engine)

• Caterpillar 322C FM Forest Swing Machines: S/N M2H00001-UP, C3R00001-UP (3126B Engine)

• Wheeled Material Handler & Power Unit: M325C MH (S/N PAN00001-UP) and 325C Mobile Hydraulic Power Unit (S/N MSG00001-UP)

Cooling Circuit Pairing & Ordering

In the Caterpillar 3126 / 3126B radiator cooling circuit, this 49 mm lower radiator hose (190-5796) works alongside the matching 50 mm upper radiator hose (190-5795) and the 94°C water temperature regulator (126-5869). Please verify your original hose part number and machine serial number prefix before placing an order.