Product Overview

Restore dependable pool circulation with the Nidec U.S. Motors AST165 Aqua-Shield replacement motor. Designed for compatible inground pool pump wet ends, this single-speed motor provides 1.65 total horsepower and approximately 3450 RPM for filtration, circulation, and standard pool-equipment operation.

The AST165 uses a standard 56J C-face mounting configuration with a threaded stainless-steel shaft. It is commonly selected as a replacement for compatible Hayward Super Pump, MaxFlo, Super II, and other pool pumps requiring the same frame, shaft, voltage, and hydraulic rating.

Dual-voltage capability allows the motor to operate on either 115V or 230V single-phase electrical service. The motor must be correctly configured for the available voltage during installation. Aqua-Shield construction includes enhanced bearing protection, a two-compartment design, and sealed ball bearings for dependable performance around pool equipment.

This listing includes the replacement motor only. The pump housing, impeller, diffuser, mechanical shaft seal, wiring, switch, and installation hardware are sold separately.

Key Features

• Nidec U.S. Motors Aqua-Shield pool pump motor
• 1.65 total horsepower output
• Replaces compatible 1.5 HP up-rated motors
• May replace select 1 HP full-rated motors
• Dual-voltage 115/230V operation
• Single-phase, 60 Hz electrical configuration
• Single-speed 3450 RPM operation
• Standard 56J C-face mounting
• Threaded stainless-steel shaft
• Counterclockwise rotation facing the shaft
• Open drip-proof enclosure
• Automatic thermal-overload protection
• Sealed ball-bearing construction
• Continuous-duty motor design

Specifications

Compatibility

The AST165 is commonly used with compatible Hayward Super Pump, MaxFlo, and Super II pump assemblies. It may also fit select American Products, Pentair, Astral, Jacuzzi, Jandy, and other pumps requiring a 56J C-face motor with a threaded shaft.

Motor fit cannot be confirmed by horsepower alone. Compare the existing motor’s total horsepower, service factor, voltage, frame, shaft thread, flange, amperage, and rotation before ordering. The pump’s impeller and diffuser must also match the motor load.

Installation Information

Installation should be completed by a qualified pool technician or electrician. Disconnect and lock out electrical power before servicing the pump.

Configure the motor for the correct supply voltage according to the wiring diagram on the motor. Replace the mechanical shaft seal whenever the motor is removed from the pump wet end. Inspect the impeller, diffuser, seal plate, housing gasket, and electrical connections before reassembly.

Prime the pump completely before startup. Never operate the motor with the pump dry.

Package Contents

• One Nidec U.S. Motors AST165 replacement motor

Pump wet end, shaft seal, impeller, diffuser, power cord, controls, and installation labor are not included.

Warranty Information

Manufacturer warranty coverage is subject to Nidec’s current terms, proof of purchase, correct motor matching, and proper installation. Incorrect voltage, water intrusion, dry operation, incompatible hydraulic components, or installation errors may affect coverage.