Swing backlash increasing or gearbox leaking on your HD450VII? A worn SG04 MFB80 swing reduction gearbox loses planetary mesh precision, causing cab jolt at direction reversal. The SG04 MFB80 is a Nabtesco swing gearbox used on HD450VII, E312B, LS265FJ excavators. RITO supplies this robust swing gearbox assembly to restore precise, backlash-free cab rotation.
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