Type FL Flywheel Coupling

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    Guardian Hydraulic


    Guardian Industries began as Guardian Products Corporation in 1941 as a manufacturer of valves, oil burner couplings, and miscellaneous plumbing products. Moving from Chicago to Michigan City, Indiana in 1949, Guardian expanded its oil burner line to include shaft-to-shaft couplings for sump-pump and sub-fractional applications. Guardian divested itself from the plumbing and valve lines, with the exception of Quik-Joint. In 1958, a fire destroyed the 8,000 square foot facility, which was rebuilt in its original East 2nd Street location.

    The product line continued to develop to include larger shaft couplings, diesel engine hydraulic pump drives, jaw couplings, and “rubber in shear” designs. In 1991, Guardian relocated to a much larger 40,000 square foot facility on Ohio Street. Modern CNC turning and milling equipment was added in 1994, and Guardian again expanded its line to include steel gear couplings, tapered grid couplings, and gen-set/compressor drives. In April 2001, Guardian completed construction of a modern state-of-the-art 50,000 square foot manufacturing facility. This new site is located on 20 acres at its present location on Highway 212, with enough room for future expansion.

    Guardian products are sold worldwide with representation in Canada, England, France, Germany, Sweden, Australia, Singapore, Hong Kong, South Africa, Venezuela, Peru, Argentina, Italy, and New Zealand. We continue to grow due to our commitment to service, quality, and willingness to “go the extra mile” for our customers.

    Guardian FL

    A two-piece flywheel coupling used on off-highway construction equipment (skid steer loaders, aerial lifts, excavators, harvestors, bucket loaders, wheeled loaders, baggage handlers, and directional boring equipment). The design consists of a nylon flywheel flange (both SAE and metric flywheels) and steel hub with internal spline or straight bore with keyway. Accommodates virtually any hydraulic pump! No lubrication required. Steel pump mounting plates; aluminum or gray iron bell housings are also available for just about any engine including Ford, Isuzu, Nissan, Kubota, Deutz, Hatz, Lister Petter, Cummins, Lombardini, Deere, Yanmar, CAT, Perkins, Briggs/Daihatsu, and GM.

    Type FL Flywheel Coupling

    • Minimum space: The entire coupling length is normally mounted inside the housing compartment requiring only a flat steel pump mounting plate which we also manufacture. Rear end plate designs also available for Kubota, Perkins, Ford, GM, Nissan, and Deutz engines.
    • Free axial travel: Crowned teeth slide freely in the nylon spline with a +-.080″ axial travel. Any shaft float is absorbed by the coupling and not transmitted to the pump components.
    • Blind assembly: Pump hub gear ring fits through the pilot hole of the plate. Faster assembly at lower cost and no inspection ports or hand holes necessary.
    • Crowned gear teeth: Provides for angular misalignment, preventing angular force on the pump shaft bearings and seals.
    • Heat Stable: Fiberglass reinforced nylon designed to operate in diesel engine ambients without air circulation. Dimensionally stable to 250°F.

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