Blog posts of '2025' 'January'

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:

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.

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If you spray deicing fluids on roads or sidewalks, you need your equipment to work whenever winter weather is going to arrive. Your pump is one of the most crucial components of a deicing and snow removal operation. Taking the time to find a reliable option will save you time and money in the long run. 

Dultmeier Sales has been providing pumps and equipment for all types of anti-ice and deicing fluids. Today we will examine the optimal pump units for various de-ice scenarios. 

Types of Pumps for Use With Deicing Liquids 

Many different types of pumps can work with deicing liquids, but centrifugal pumps are the best option for the high-volume transfer requirements of large-scale ice prevention on roads and parking lots. 

The specific centrifugal pumps used should be able to handle the corrosiveness and heaviness of deicing fluids.  A few common deicing liquids include salt brine (NaCl), magnesium chloride (MgCl), and Calcium Chloride (CaCl).  There are others such as Potassium Acetate and products that include natural byproducts such as sugar beet and corn-based additives. 

Most of these deicing liquid products are quite corrosive, so pumps constructed of polyethylene, polypropylene, and stainless steel are much better choices than those constructed of cast iron, ductile iron, or aluminum. You can learn more about the materials compatible with salt brine and other device liquids in this de-ice equipment guide that covers the types of tanks, hoses, strainers, etc. that you need.

Standard single mechanical seals with Viton or EPDM elastomers are typically suitable for most deicing liquids, although double mechanical seals are even better with all products and are best for the deicing liquids that have solids in them such as the sugar beet or corn-based additives.

Transfer Pump Units with Electric Motors

For deicing liquids, centrifugal transfer pumps should be constructed of polyethylene, polypropylene, or stainless steel and should include electric motors that are Totally Enclosed and Fan-Cooled (TEFC).  These are generally in the 2” or 3” size and most are self-priming.

Here you can see the polyethylene pump units with TEFC electric motors that we stock:  Dultmeier Sales 2 - 10 HP Polyester Centrifugal Pump / Motor Units, Self-Priming - Dultmeier Sales

For deicing Liquids, it is important to select models with a Specific Gravity (S.G.) Rating of at least 1.2 or higher; this means the pump unit can safely pump liquids that are heavier than water (which has a 1.0 S.G. Rating).  This will typically be 3HP, 5HP for 2” sizes, and 7.5HP or 10HP for 3” sizes.  This will prevent the electric motor from overloading and tripping circuit breakers when pumping at high flow rates.

Recommended High-Volume Deice Liquid Transfer Pumps:

• Poly pumps won't rust and will hold up to corrosive liquids: Electric Motor-Driven Poly Transfer Pump Units

• Stainless steel is more costly, but in addition to being corrosion resistant, they are much more durable in the cold: Stainless Steel Electric Motor Driven Transfer Pump Units

Transfer Pump Units with Gas Engine Drives  

These centrifugal transfer pumps are popular where sufficient electrical power is not available.  Be sure to select 5HP engine models in the 2” sizes and at least 6.5HP for 3” size pumps.  Here are some popular 2” Polypropylene Transfer Pumps with 5HP Honda Gas Engines that we stock: 

• 2" Poly Banjo Pump with 5HP Honda Engine
• 3” Poly pump with 6.5 HP Honda Gas Engine

Sprayer Pumps with Hydraulic Motors

Centrifugal Transfer Pumps are designed to move relatively high volumes of liquid (100 to 300 GPM for 2” and 3” sizes) but not for high-pressure spraying. So for Anti-ice and De-ice Sprayers, it is important to use centrifugal pumps that are designed for spraying.  These pumps can generate much higher pressures than centrifugal transfer pumps.  Most of these centrifugal sprayer pumps have integral hydraulic motors and run off the hydraulic hoses that run into and out of the hydraulic motor on the pump. 

Many models can develop pressures of 80 to 100 PSI, so they can force liquid through the spray nozzles at sufficient volume to properly anti-ice and de-ice the roadways.  It is very important to size your sprayer pump properly for the application rate (in gallons per lane-mile) and average speed your truck will be driving.  We can assist you with sizing these sprayer pumps. 

It is also important to select a sprayer pump with the correct hydraulic motor to match your hydraulic system's oil flow rate (gallons per minute of hydraulic oil).  Note that these pumps can be constructed of cast iron and will last reasonably long with deicing liquids if flushed out periodically (and definitely after each spray season and then filled with RV Anti-Freeze or other non-corrosive liquids).

Here are some centrifugal sprayer pumps (cast iron and stainless shown) with hydraulic motors from Hypro that are popular for spraying deicing liquids at proper application rates and speeds: 

• Hydraulic-Driven Centrifugal Pumps for Deice

Maintenance:  Always remember to flush out all deicing liquids from your pump units right after the season ends and fill them with RV Anti-Freeze or other non-corrosive liquid.  This will help your pumps last many years.

Tech Sales and Engineers on Staff to Assist You:  We can help you size and select the correct transfer pumps and sprayer pumps for your liquid deicing applications.  Just give us a call.

Tech Ag & Industrial Sales

Shane Blomendahl is a tech sales veteran at Dultmeier Sales with over 10+ years of experience in liquid handling products covering several industries and applications.

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