$2.40
Gear oil escaping around the upper drive unit housing joint shows up as residue on the outside of the unit or a dropping oil level inside it, and this gasket is what seals that joint. It carries Crown OEM number 73443 and fits the upper drive unit on Crown PE3500 and PE4500 electric pallet jacks.
This gasket seals the upper drive unit on Crown PE3500 and PE4500 electric pallet jacks, cross-referencing to Crown's own OEM part number 73443. Its function is straightforward: sealing the upper drive unit housing to keep gear oil contained inside the unit rather than leaking out around the housing joint, the failure mode that shows up as oil residue around the drive unit or a gradually dropping oil level inside it.
As a gasket rather than a wear item with moving parts, this component does not fail from cyclic operation the way a bearing or bushing does. It fails from age-related hardening, heat cycling, or disturbance during a prior service event that broke the original seal.
Crown's PE series pallet jacks use more than one gasket at different points in the drivetrain, and this one is specific to the upper drive unit assembly. A technician opening that unit for any service reason should fit a fresh gasket rather than reusing the old one, since a gasket that has already been compressed and released once rarely reseals as reliably the second time.
