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Discontinued by Nice. The MX5421 Mercury 310 Motor Kit (Retrofit) is the updated version. Nice Apollo 73090005 is the original gearmotor assembly for the Vanguard 3501 swing gate operator. The Vanguard 3501 runs at 12 VDC. The MX5421 kit replaces four parts at once: the motor (73090005 to MX5420), the chain (72520000 to MX5622), the small sprocket (50B14 to MX5624) and the terminal strip (TB-6 to TB-8). The new motor can be wired to a 1050US controller. Its two encoder wires stay unconnected because the 1050US does not use the encoder. The operator still works normally. FitsVanguard 3501 (12 VDC)What's Included MX5420 motor MX5622 chain MX5624 sprocket TB-8 terminal block Before You Order Replaced by MX5421 Mercury 310 Motor Kit (Retrofit). Units built for the Mercury 310 board carry a 2 in x 5 in label above the model ID on the operator box. Those units take the MX5420 motor alone. Units with a 1050US controller take the full MX5421 kit when the motor is replaced. The old motor mount plate, mount hardware and shaft key are reused.
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🇺🇸 Ship from USA · On Agora since 2026
$836.00