Seals

Types of Replacement Seals

Door and cab seals are extruded profiles, usually bulb or D-shaped, that compress against the frame. Shaft seals ride on a rotating shaft with a lip and often a garter spring. Quad rings replace O-rings where a four-lobed profile resists rolling in dynamic positions. Seal kits bundle every seal for one assembly, which is the right way to rebuild a hydrostatic drive motor because opening it for a single seal costs the same labour as doing all of them.

Wind noise and water at the floor point to door seals. Weeping at a shaft or cylinder points to the hydraulic side. Replacing a shaft seal without inspecting the shaft's wear groove is how a new seal ends up leaking within hours.