When your sprayer pump is functioning perfectly, it often goes unnoticed. However, when it starts to leak or fails, identifying the correct repair parts or finding a replacement becomes urgent to minimize downtime.
This task can be challenging, especially if there are no visible model numbers or identification tags on the pump. Many sprayer manufacturers use Hypro hydraulic motor-driven pumps but often the nameplate is removed, lost, or becomes unreadable over time. As a result, identifying the original pump can become quite a task.
At Dultmeier we have been selling the Hypro brand for decades and experience has taught us what to look for in order to determine your pump model. With the right approach, it is possible to identify your pump’s specifications and find suitable replacement parts or a complete pump replacement.
Guide to Identify Hypro Hydraulic Sprayer Pump
Although examining the physical attributes of your pump is not a 100% accurate way to determine the model of your Hypro pump, it is a good place to start. Often you can narrow down enough to find repair parts or determine the performance specifications.
Note: If you are unsure of the pump manufacture or if you have a different type of pump, you can refer to our sprayer pump guide or give us a call.
Measure Fluid Port Size/Type
The inlet and outlet ports differ in size and type. Common configurations include threaded connections or manifold flanges. After determining the drive type, measuring the inside diameter of each port will help narrow down your pump model.
Here are the typical port sizes for the different series of Hypro Hydraulic Pumps:
| Pump Series | Connection Type | Inlet Port | Outlet Port |
| 9303 | Threaded Connections | 1-1/2" NPT | 1-1/4" NPT |
| Flanged Connections | 220 flange (2" ID) | 200 flange (1-1/2" ID) | |
| 9306 | Threaded Connections | 2" NPT | 1-1/2" NPT |
| Flanged Connections | 300 flange (3" ID) | 220 flange (2" ID) | |
| 9307 | Threaded Connections | 2" NPT | 1-1/2" NPT |
| Flanged Connections | 300 flange (3" ID) | 220 flange (2" ID) | |
| 9313 | Threaded Connections | 1-1/2" NPT | 1-1/4" NPT |
| Flanged Connections | 220 flange (2" ID) | 200 flange (1-1/2" ID) | |
| 9314 | Threaded Connections | 2" NPT | 1-1/2" NPT |
| Flanged Connections | 220 flange (2" ID) | 220 flange (2" ID) | |
| 9316 |
Flanged Connections Only |
300 flange (3" ID) | 220 flange (2" ID) |
Some of these pump series have the same measurements. In this case, you will need to examine some other characteristics to decide which series of pump you have. For example, the 9306, 9307, and 9316 series can all come with a 300 x 220 flange.
You can determine which series you have by looking at some other characteristics of the pump. You can view more details of each pump below:
- 9306 - Standard pump with no wet seal
- 9307 - High flow pump with larger capacity hydraulic motor, significantly larger housing than the 9306
- 9316 - ForceField wet seal pump. Has a barrier fluid reservoir around the pump seal.
Hydraulic Motor Variations
Hypro offers several different hydraulic motor sizes, so measuring the pump ports only tells us part of the info we need. These motors have different hydraulic flow rates and work with different tractors or sprayer hydraulic systems. For the 9303, 9306, 9313, 9314, and 9316 series you can pinpoint the motor type by measuring the motor’s gerotor housing.
In the image below you can see the location of the gerotor and the reference to it in the manual parts breakdown. This shows the gerotor housing width for each different motor model.
Do note that you must refer to a Hypro pump manual to find the hydraulic motor measurements for the different motors.
Housing and Seal Materials
When you have measured the ports and gerotor housing you are most of the way there. The final step is to consider the housing material. The pumps are available in cast iron or stainless steel. This part is easy but it is important to consider. Typically the cast iron pumps are fitted with the standard Viton® /Ceramic mechanical seal and the stainless steel pumps have Life Guard® silicon carbide seals. The Life Guard® seal is intended to last much longer with abrasive liquids.
Hypro Pump Model Example
Let’s look at a real example and see if we can determine the model number. In this video, we have a Hypro pump on a self-propelled sprayer. We do not have a nameplate on the pump so we need to measure the ports and hydraulic gerotor housing.
The pump has a 2-inch FPT inlet and a 1-½-inch FPT outlet. This means it is a 9306 series pump. The hydraulic motor gerotor housing measures ⅝ inches wide which tells us that we have an HM5 hydraulic motor. Finally, the pump housing is cast iron so all of this info would give us a model of 9306C-HM5
With this info, you can determine the model you have and then find the repair parts or replacement pump you need. If you have questions or would like help give us a call or email today.
Tom Hansen, P.E.
Tom Hansen, Partner and Engineer at Dultmeier Sales, brings over 25 years of expertise in fluid handling equipment for agriculture, deicing, petroleum, and more.
