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    • UniCarriers Forklift Replacement Parts

    Picture for manufacturer Unicarrier

    Aftermarket and replacement UniCarriers parts built to original equipment specifications. Search by part number, model, or description to find the right part for your forklift.

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    UniCarriers Forklift Parts

    We stock aftermarket UniCarriers components for forklifts and pallet jacks — manufactured to OEM-spec dimensions so downtime stays short and you skip the OEM markup.

    Why buyers choose us:
    • OEM-Spec Fitment: Built to meet or exceed original equipment dimensions.
    • Fast Nationwide Shipping.
    • Part Verification: Not sure which part fits? Contact us and we'll verify it for you before you order.
    Manufacturer guides

    Nissan Forklift Engines: H20, H20-II, H25, K21 and K25 Explained

    Nissan's H20, H20-II, H25, K21 and K25 power industrial equipment under many different OEM badges. The H-series is an iron pushrod design with a timing chain; the K-series is an aluminum-head overhead cam with a timing belt. The two families share essentially no parts, and matching displacement — H25 versus K25 — is not a cross-reference. A magnet on the cylinder head tells you which family you have.

    Nissan K21 and K25 Engines Explained

    The K21 and K25 are four-cylinder industrial engines sharing an 89 mm bore and differing in stroke, at 2,065 cc and 2,488 cc. Both use an overhead-valve pushrod valvetrain with a rocker shaft and screw adjusters, a bathtub combustion chamber, a timing chain, five main bearings and a chain-driven side power take-off. Both run gasoline or LPG.

    Nissan K21 and K25 Maintenance and Troubleshooting

    Routine service on a K21 or K25 covers valve clearance set hot at 0.38 mm on every valve, a cold retighten of the head bolts and manifold nuts, belt deflection, oil and filter, plugs, air and fuel filters and coolant. Most running complaints trace back to compression, ignition or fuel, and a compression test separates them quickly.

    Forklift LPG fuel systems

    An LPG forklift stores fuel as a liquid under pressure in a tank. A vacuum-operated fuel valve in the filter unit lets liquid reach the vaporizer only while the engine is being started or is running. The vaporizer, heated by engine coolant, drops the pressure and changes the liquid to vapor. The carburetor meters that vapor against airflow, and a governor limits engine speed.

    Forklift masts and carriages

    A forklift mast is a set of nested weldments that slide on load rollers and strip bearings, raised by lift cylinders and chains. The carriage carries the forks and rides in the inner weldment. The checks that matter are roller and bearing clearance, chain length and tension, and internal hydraulic leakage. Mast parts are heavy and can move, so the safety procedure must be followed.