4448395 Hitachi ZX120 Boom Cylinder Repair Seal Kit 4428437 4438211

Boom cylinder seal kit for the Hitachi ZX120

Kit 4448395 is a boom cylinder seal kit for the Hitachi ZX120 excavator. Cross-reference numbers listed with it: 4428437 and 4438211.

The boom cylinder raises and lowers the boom, so its seals work against the weight of the whole front end.

The compounds are polyurethane (PU), Viton and NBR. PU copes with pressure spikes, Viton with heat, and NBR is the usual oil-resistant rubber.

Fit check

Please confirm your machine model, the part number of your cylinder or serial number first. These kits are specific to the application.