Titan 431-007 Coupling Nut
OEM Titan Hydraulic Motor Fastener
Titan 431-007 Coupling Nut is an OEM heavy-duty threaded fastener used to connect the connecting rod to the displacement rod and to secure the pump to the motor in compatible Admiral, Hydra M2000, Hydra M4000, Hydra Pro IV, and Hydra Pro Super spray systems.
Compatibility Overview
Replacement coupling nut restores secure pump-to-motor connection, ensures proper rod alignment, and prevents separation under high pressure. For related components, see the Titan Air Powered Airless Sprayer Parts collection.
Titan Hydraulic Motor Component Replacement
Titan 431-007 Coupling Nut for Hydra Pro IV, Hydra M2000, and Admiral Systems
Titan 431-007 is an OEM coupling nut engineered to connect the connecting rod to the displacement rod and to secure the fluid pump to the hydraulic motor in compatible Admiral, Hydra M2000, Hydra M4000, Hydra Pro IV, and Hydra Pro Super spray systems. According to the Titan Hydra Pro IV service manual, the coupling nut is released by removing the set screw, and it is used to thread the connecting rod into the displacement rod during reassembly. A worn or damaged coupling nut can cause loose connections, vibration, and potential separation of the pump from the motor under high pressure.
| Detail | Technical / Commercial Information |
|---|---|
| Product Overview | OEM Titan coupling nut used to connect the connecting rod to the displacement rod and secure the pump to the motor in Admiral, Hydra M2000, Hydra M4000, Hydra Pro IV, and Hydra Pro Super spray systems. |
| Function | Provides a threaded connection between the connecting rod and displacement rod, and secures the fluid pump to the hydraulic motor. The coupling nut allows for assembly and disassembly of the pump and motor, and provides a rigid, vibration-resistant joint for power transmission under high pressure. |
| Compatible Systems | Admiral 155-559 Fluid Pump Assembly; Hydra M2000; Hydra M4000; Hydra Pro IV; Hydra Pro Super. Verify fit using the correct parts diagram for your exact model and serial number. |
| Industrial Applications | Professional sprayer repair, hydraulic motor rebuilding, fluid pump servicing, and preventive maintenance across Hydra series spray systems used in commercial painting, protective coatings, and industrial applications. |
| Related Parts Commonly Serviced Together | Connecting rod, displacement rod, set screw, piston rod, and other motor and pump assembly components. Inspect these parts when replacing the coupling nut. |
| Common Problems Solved | Loose pump-to-motor connection, vibration loosening, stripped threads preventing secure fastening, and separation of connected components under high pressure. |
| Signs Replacement Is Needed | Visible thread damage, corrosion, or deformation on the nut. Loose connections, increased vibration, loss of power transmission, or separation of the pump from the motor may also indicate a worn or damaged coupling nut. |
| Installation & Maintenance | Release the set screw and remove the coupling nut. When reassembling, insert the connecting rod through the coupling nut and thread it into the displacement rod. Hold the air motor piston rod at the wrench flats when unthreading or tightening the coupling nut. Inspect mating threads for damage or wear. Clean threads thoroughly before installation. Apply thread lubricant if specified, and torque to manufacturer specifications. |
| Commercial Benefits | Restores secure pump-to-motor connection, eliminates looseness and vibration, ensures reliable power transmission under high pressure, prevents component separation, and extends equipment service life. |
The 431-007 Coupling Nut is a critical mechanical fastener in the power transmission path of Hydra Pro IV, Hydra M2000, Hydra M4000, and Admiral sprayers. The Titan Hydra Pro IV service manual specifies that the coupling nut is released by removing the set screw, and that the connecting rod is inserted through the coupling nut and threaded into the displacement rod during reassembly. The air motor piston rod should be held at the wrench flats when unthreading or tightening the coupling nut. Over time, threads can become worn, stripped, or corroded, leading to loose connections, vibration, and potential separation of the pump from the motor under high pressure. When replacing, inspect the mating threads on both components for damage or wear. Clean threads thoroughly before installation. Apply thread lubricant if specified, and torque to manufacturer specifications. Do not reuse a coupling nut that shows signs of wear, thread damage, or corrosion. Use genuine Titan components to ensure proper fit, correct material specifications, and reliable long-term operation. For related Titan air-powered sprayer components, see the Titan Air Powered Airless Sprayer Parts and Air Powered Airless Sprayer Parts collection.
Frequently Asked Questions
Quick contractor-focused answers for confirming fitment, function, and service value.
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