Part number 181-906 is a genuine lower pump block used in Admiral, Commander, Hydra M, and Hydra Pro Super airless sprayers. This precision-machined component forms the lower section of the pump assembly, housing critical internal parts such as pistons, packings, and valves. It provides structural support, maintains component alignment, and contains fluid under high pressure. A cracked, worn, or corroded lower pump block can cause fluid leaks, loss of pressure, and pump failure. This genuine replacement restores proper pump integrity and reliable operation.
| Part Number | 181-906 |
|---|---|
| Part Description | Lower Pump Block |
| Brand |
|
| Fits |
|
| Condition | New |
The 181-906 Lower Pump Block is a genuine OEM component designed for Admiral, Commander, Hydra M, and Hydra Pro Super airless sprayers. This precision-machined block forms the lower section of the pump assembly and serves as the foundation for critical internal components including pistons, packings, intake and discharge valves, and fluid passages.
The lower pump block is manufactured from high-strength materials to withstand the extreme pressures generated during sprayer operation. It maintains precise alignment of moving parts, provides sealing surfaces for packings and gaskets, and contains the fluid within the pump chamber. The block includes precision-bored cylinders, threaded ports for fittings, and mounting surfaces for attachment to the drive housing.
Over time, the lower pump block can suffer from wear, corrosion, or cracking due to pressure cycling, chemical attack, or physical impact. A damaged block can cause internal leakage, loss of pressure, fluid contamination of the drive system, and complete pump failure. Replacing a worn or damaged lower pump block with this genuine part restores proper pump geometry, ensures reliable sealing, and extends the service life of the sprayer.
| Component housing | Houses pistons, packings, valves, and fluid passages |
|---|---|
| Pressure containment | Withstands high fluid pressures during operation |
| Component alignment | Maintains precise alignment of moving parts |
| Fluid sealing | Provides sealing surfaces for packings and gaskets |
| External leakage | Fluid leaking from pump block or seals |
|---|---|
| Internal wear / scoring | Scored cylinder walls or worn bores |
| Cracking / corrosion | Visible cracks or severe corrosion in the block |
| After major pump failure | Replace if debris or damage has compromised the block |
Part 181-906 is compatible with the following sprayer models. Always verify your machine's parts diagram to confirm correct fitment.
| Brand / Model | Component |
|---|---|
| Admiral (Model No. 830-331) | Lower Pump Block |
| Admiral (Model No. 860-451) | Lower Pump Block |
| Admiral (Model No. 830-451) | Lower Pump Block |
| Admiral (Model No. 941-441) | Lower Pump Block |
| Commander (Model No. 741-440) | Lower Pump Block |
| Commander (Model No. 761-301) | Lower Pump Block |
| Commander (Model No. 761-411) | Lower Pump Block |
| Commander (Model No. 741-331) | Lower Pump Block |
| Hydra M | Lower Pump Block |
| Hydra Pro Super | Lower Pump Block |
When replacing the lower pump block, it's good practice to inspect these related components, as they are typically removed and reinstalled during the repair.
Inspect pistons for wear, scoring, or damage. Replace if necessary.
Always install new packings and seals when replacing the pump block.
Inspect intake and discharge valves and replace if worn.
Copyright © 2024 AlltitanParts.com - All Rights Reserved.
