BlogIcon.png    TwitterIcon.png  YTicon.png  

Call Us! 800-228-0905

  • offline-1295421357
  • offline-837801025

Sprayer Depot Blog

Product Highlight: SHURflo Pumps

Posted by Sprayer Depot on Thu, Jun 15, 2017

SHURFLO® pumps are widely used on professional spray equipment. A leading provider of fluid transfer solutions, SHURFLO® offers a variety of pumps to to fit your needs. Let's take a closer look at some of our most popular models:

SHURFLO® 8000 Series Diaphragm Pumpshurflo.jpg
  • One of the most widely used industrial pumps
  • Delivers 1.8 gpm (6.8 l/min) providing maximum performance in a wide range of spray applications
  • Designed to provide consistent, dependable performance no matter what position you mount them
  • Self-priming, and can maintain pressures up to 150 psi
  • Comes standard with an automatic demand switch and a built-in check valve
  • Like the 2088 series, these can also run dry without damage to the pump

SHURFLO® 2088 Series Diaphragm Pump



  • Delivers reliable performance in high flow, moderate pressure applications 
  • Great for heavy duty jobs like agricultural spraying or transfer of vast amounts of fluid
  • Made with chemical-resistant materials so you can reliably pump the fluids you need to without worrying about damage to your equipment
  • Designed for lots of use and are easy to maintain
  • Can be mounted in any position

SHURFLO® SLV Series Diaphragm Pump


  • Offers tremendous value for low-volume spraying needs
  • Compact size makes it ideal for transportation to off-site jobs 
  • Resistant to chemicals thus preventing corrosion and breakage of essential pump parts


You can learn more about these SHURFLO® pumps on our website or talk to one of our customer service technicians by calling 800-228-0905. 

Shop All SHURFLO Pumps



Topics: Diaphragm pumps, Ag Sprayers, SHURflo pumps

Product Highlight: Diaphragm Pumps

Posted by Sprayer Depot on Fri, Feb 03, 2017

Having the right equipment to get a job done is essential to making sure that projects get done efficiently. Choosing the right diaphragm pump is no exception. Costly equipment repairs and lengthy downtime can disrupt the day-to-day operation of your business so it’s important to evaluate product options thoroughly to make the best possible purchasing decision.

Uses for Diaphragm Pumps

Diaphragm pumps are used extensively in many industries and can handle a very wide variety of liquids. Diaphragm pumps can transfer liquids with low, medium or high viscosities and also liquids with a large solids content. They can also handle many aggressive chemicals such as acids because they can be constructed with a wide variety of body materials and diaphragms. They are especially popular for high-pressure tree spraying and lawn spraying.

Cost, quality, maintenance, shipping time, product warranty and reviews are important things to take into consideration when choosing a diaphragm pump so be sure to evaluate your needs carefully and compare pump options across a few different brands or manufacturers.

In this post we'll take a closer look at a few of Sprayer Depot’s most popular diaphragm pumps:

Hypro D30GRGI9910-D30GRGI-actual2.jpg
  • Medium pressure diaphragm pump
  • Recommended for spraying herbicides, pesticides, liquid fertilizers, and many other hard-to-handle fluids
  • Gearbox and pressure regulator  allow for the pump to be connected to a gas engine

Comet MP20


  • Medium pressure diaphragm pump
  • Twin diaphragm pump with universal drive face and mounting rails
  • Great for lawn care and pest control

CDS John Blue DP-43-P

CDS -John-Blue-Diaphragm-Pump.jpg

  • 2 Diaphragm pump
  • Compact and lightweight -can be driven by PTO, gas engine or electric motor depending on your specific application needs
  • Ideal for gardening, small sprayers, washers, and liquid transfer


More Top Brands

Do your homework and take a look on our website at our complete inventory of diaphragm pumps. Check out more top brands like Udor, SHURflo, Everflo and Delavan and make sure to give yourself the time you need to browse and comparison shop,. You can also review this previous blog post to learn more about how centrifugal pumps differ from diaphragm pumps. For expert advice call our Customer Service Technicians at 800-228-0905.

Don’t forget to stock up on parts and repair kits to keep your new pump operating efficiently. At Sprayer Depot we stock a full range of control units, repair kits, shaft kits  and more, for all the brands we sell on our site, so it’s easy to make sure you have all the parts you need before checking out with your new pump purchases. With Sprayer Depot’s SAME DAY shipping guarantee, all orders placed by 5:00 p.m. (ET) ship the SAME DAY.

Shop Pumps & Parts 


Topics: Hypro, Udor, Diaphragm pumps, Comet Pumps, Delavan

Guest Post: How Centrifugal Pumps Are Different From Diaphragm Pumps

Posted by Sprayer Depot on Wed, Jun 08, 2016

Contributed by Guest Blogger: 
Mark Techler,  Factory Representative - Hypro & SHURflo Ag and Industrial Pumps and Accessories

Diaphragm pumps are recommended for sprayers needing pressures up to 700 Centrifugal_Pumps.jpgpsi, including applications like insecticide and fungicide spraying and spraying trees. If you need 100 psi or less for spraying or liquid transfer, consider a centrifugal pump, which will give you the option of higher flow plus these other features:

  • Centrifugal pumps are simple compared to diaphragm pumps. With so few moving parts, a centrifugal pump needs less maintenance and can last longer than a diaphragm pump. A centrifugal pump has no gearbox, diaphragms, check valves, sight glass, pulsation damper, gear lube, or crankcase oil.
  • Centrifugal pumps do not require a relief valve. When the spray boom or gun on a centrifugal discharge is shut off, and the pump continues to run, the liquid internally bypasses without damaging the pump as long as a vent line is in the system.
  • The line strainer can be plumbed into the discharge side of a centrifugal pump instead of the suction side as on a diaphragm pump. This eliminates the potential of a clogged strainer reducing flow to the pump suction port and causing cavitation. Use the Hypro 3350 series strainers that are rated at 200 psi.
  • Higher pressure on a diaphragm pump requires more hp. Higher pressure on a centrifugal pump requires less hp. You will get less flow with higher pressure on a centrifugal, but that flow may be adequate for your application. Always consult the pump performance chart.

Tips for using centrifugal pumps:

  • Consider both spray centrifugals (higher pressure) and transfer centrifugals (higher flow) when choosing a pump.
  • Know your material options: cast iron, stainless steel, polypropylene, and (for transfer pumps) aluminum.
  • Know your drive options: pedestal with belt and pulley or direct drive, hydraulic motor, gas engine, PTO drive with planetary gear, electric motor, and 12-volt clutch drive.
  • If your liquid source provides a flooded suction you can use a non-self-priming centrifugal. Use a self-priming centrifugal pump when the liquid source is below the pump.
  • Use inlet plumbing one pipe size greater than the suction port of the pump. You can choke down the discharge side but do not starve the suction side of the pump.
  • Use a vent line kit to improve priming, remove air from the pump, and to let hot water escape from the pump when the outlet is shutoff - and let cooler water in. This is cheap insurance against a seal failure.
  • Consider a Life Guard seal if you suspect a run dry condition. This silicon carbide seal is more abrasion resistant than standard carbon-ceramic seals and conducts heat away from the seal area, resulting in longer seal life. Use this with cast iron and stainless pumps only.
  • Increase pressure by running at 6000 rpm. Hypro cast iron pedestal pumps can be belt driven to 75 gpm at 140 psi by running at 6000 rpm.

Centrifugal pumps are a low cost of maintenance option for spraying and transferring liquids.

Shop Hypro Centrifugal Pumps  



Topics: Hypro, Diaphragm pumps, sprayer, Centrifugal Pump, Transfer Pumps, Guest blog

Top 5 Most Viewed Instructional Videos

Posted by Sprayer Depot on Fri, Feb 05, 2016

One of the best things about the Internet is that learning a new skill is just a few clicks away. You MostViewed_InstructionalVideos_SprayerDepot.jpgcan find a variety of resources that can teach you everything from calibrating your sprayer to finding the best apps for your industry with a quick search.

Learning how to do something new is easier if you see how it’s done and then do it yourself. We believe instructional videos are one of the best learning tools out there. With that in mind, our YouTube Channel offers several videos with simple and practical content that will help you successfully repair and maintain your spray equipment .

Our videos are less than five minutes long, so you can easily get up to speed on a number of various topics. This comes in handy when a part breaks and you need to replace it quickly, whether you're at the office, home or out in the field.

We’ve rounded up the top 5 most viewed instructional videos:

1. Replacing a SHURflo Pressure Switch

SHURflo’s 8000 series diaphragm pump is one of their most widely-used pumps and a faulty pressure switch is one of the most common repairs. Our video features step-by-step instructions on how to easily replace this pressure switch.


2. SHURflo Check Valve Repair Kit

Another SHURflo repair makes the list! These economical pumps are used in a variety of settings, making them quite popular. Replacing the check valve is another easy repair that usually goes hand in hand when replacing the pressure switch.


3. Repairing a Hypro D30 Diaphragm Pump

The Hypro D30 is one of Hypro's most popular medium pressure diaphragm pumps. Its low-cost maintenance and almost wear-free operation help make it the ideal choice for a wide variety of spraying jobs. This video features instructions on how to replace the diaphragms.


4. Repairing a JD9®-C Spray Gun O-Ring

This heavy duty spray gun is adjustable from a fine mist to a long distance pencil stream. This is a very reliable spray gun and one of our best sellers. This is the video for you if your JD9®-C suddenly springs a leak.


5. Repairing an Udor KAPPA-40 Diaphragm Pump

Udor KAPPA series pumps offer reliable, high-quality and popular solutions when working with harsh chemicals. The Kappa-40 is one of our most popular diaphragm pumps. Watch this video to see the repair broken down into step-by-step instructions that are easy to follow. 

Topics: Diaphragm pumps, Sprayer Depot, Instructional Video, Shurflo, Youtube

Product Highlight: Udor Kappa-43 Diaphragm Pump

Posted by Sprayer Depot on Wed, Nov 18, 2015

Udor Kappa series pumps offer reliable, high-quality and popular solutions when working with harsh chemicals. Due to their anodized aluminum construction, they are ideal for handling a number of common of professional chemicals, such as herbicides, pesticides, liquid fertilizers, de-icing materials, and other hard-to-handle fluids. 

One of our top sellers is the Udor Kappa-43 diaphragm pump. This is a commonly used pump in various horticulture, agricultural, lawn care, nursery, pest control and turf spraying applications. Let's take a closer look at some of its best features!


Probably the most common issue we see with this type of pump is a diaphragm rupture. Fortunately, this is a pretty easy repair you can do yourself to save time and money. Continue reading below for steps on how to repair a Udor Kappa-43 Diaphragm pump and watch the easy instructional video that follows.

 For this project you will need the following tools:

  • A screwdriver
  • Wrench
  • 1/2" socket
  • 11/16" socket
  • Diaphragm kit (3 piston diaphragms, 6 sets of O-rings)

Let's get started! Follow these steps:

  1. Loosen the bolts on one of the 3 head assemblies
  2. Remove the head assembly
  3. Remove the diaphragm, nut, and washer
  4. Remove the diaphragm
  5. Remove the sleeve, and drain the internal oil
  6. Loosen the bolts on the 2nd head assembly
  7. Remove the head assembly
  8. Remove the diaphragm, nut, and washer
  9. Remove the diaphragm
  10. Remove the diaphragm sleeve
  11. Repeat this process on the remaining head
  12. Clean the inside of the pump with carb or brake cleaner
  13. Replace the sleeve, lining up the holes on the sleeve with the holes on the piston
  14. The diaphragm has a beveled side; this side will be pointing out
  15. Replace the diaphragm, nut, and washer; tighten with a wrench
  16. On each side of the 3 outer head assemblies remove the inside of the valve cage, replace the spring, small seat (beveled side down), and large metal seat
  17. Place the valve assembly back onto the head and replace the O-ring with a new one
  18. The other side has the same pieces in the opposite order
  19. Replace the spring, seat, and large seat
  20. Replace the O-ring with a new one
  21. Repeat this process on all 3 head assemblies
  22. Replace the head assembly
  23. Tighten the assembly skipping bolts in a clockwise pattern to evenly tighten
  24. Replace the piston sleeve on the 2nd side
  25. Replace the diaphragm with the beveled side out
  26. Replace the diaphragm, washer, and nut; tighten with a wrench
  27. Replace the 2nd head assembly, tightening the bolts with a wrench
  28. Using non-detergent 40W pump oil; fill the open side of the pump to the brim
  29. Replace the final piston sleeve, lining up the holes with the piston
  30. Clean off excess oil  Replace the final diaphragm
  31. Replace the diaphragm, washer, and nut; tighten with a wrench
  32. Replace the final head

Shop Udor Kappa Series Pumps

Do you have an instructional video you'd like to see featured? Let us know in the comments below.



Topics: Diaphragm pumps, Sprayer Depot, Instructional Video, Udor Pumps, Udor Kappa, pump repair kit, Sprayer Depot Instructional Video, Diaphragm Kit, repair kit, product highlight, kappa-43

Guest Post: Comparison of Roller to Diaphragm Pumps for Horticultural Spraying

Posted by Sprayer Depot on Thu, Oct 08, 2015

Contributed by Guest Blogger: 
Mark Techler,  Factory Representative - Hypro & SHURflo Ag and Industrial Pumps and Accessories


Most horticultural spraying equipment (those spraying fruits, vegetables, ornamental foliage, lawns, shrubs, and in nurseries) use either roller or diaphragm pumps. Here are some thoughts when considering which kind of pump to buy.

Match the pump to your spray material. Consult the chemical labels of the herbicide, pesticide, fungicide, or fertilizer you are pumping. Make sure you have the proper flow going to the spray nozzles or gun with enough flow left for agitation. Then match the flow and pressure to the pump performance chart. Do not buy a pump based on specifications shown on a price list. Consult the pump performance chart and notice that a pump will not perform at the max gpm and max psi. This is particularly true of roller pumps.

Match the pump to the duty. Roller pump life depends on the pump body material. Here is a rough estimate based on our tests:

Cast iron – 150 hours

Ni-Resist – 300 hours

SilverCast – 1000 hours

4001C_originalDiaphragm pumps, properly maintained, can last many 1000s of hours because the spray material is isolated from the drive components by a synthetic rubber diaphragm. We have seen them last over 30,000 hours. Plan on changing your diaphragms every 500 to 1000 hours of use, depending on rpm, psi, liquid pumped, and if the pump is flushed after use.

Analyze your costs. For example, both the 7560C cast iron roller pump ($154.55*) and the 9910-D30 diaphragm pump ($494.19*) will operate at 9 gpm/150 psi/ 540 rpm. The roller pump costs much less but will last a shorter time, which might make sense if you are spraying 50 hours per year. The diaphragm pump will have a higher initial cost but make sense if you are a commercial user pumping 1000 hours per year. Roller pumps can be repaired but it is difficult to predict if the repaired pump will perform close to new pump specs. For that reason, many worn roller pumps are scrapped. Diaphragm pumps will need the diaphragms replaced, but the pump will return to new pump performance.

Assess drive and plumbing. Roller pumps can run directly on a PTO shaft and will need a gear reduced engine or belts and pulleys for engine drive. The exception is 4101 series which can run directly on an engine up to 2600 rpm. Diaphragm pumps can run directly on a PTO and are available with gearboxes for engines. A relief valve, which is required for either pump, must be added to a roller pump system but is generally included as an attachment on a diaphragm pump.

If you have any questions consult the experts at Sprayer Depot. 

 Shop Pumps & Parts 

*When purchased at Sprayer Depot 


Topics: Hypro, Diaphragm pumps, sprayer, Roller Pump, spray tips, spray nozzle, horticulture, Guest blog

Easy Steps to Repair a Kappa-40 Diaphragm Pump

Posted by Sprayer Depot on Wed, Aug 19, 2015

Our Repair Technicians are the best! Yes, we are proud of their excellent service and extensive knowledge in all kappa40_schematicthings sprayers. They are quick to diagnose issues and repair them in no time. They work hard five days a week to make sure your downtime is minimal. Usually, repairs are done within the same day unless we need to order parts or if we have a long queue for the day. Even then, most repairs only take 24-48 hours.

If you've visited our website or follow us in social media then you know we have many instructional videos available. For all of our customers who are not local thus unable to stop by for a repair, we thought it would be cool to have short, easy and convenient videos featuring some of the most common repairs that you can do right at home.

Today we are featuring steps on how to repair a Udor Kappa-40 Diaphragm pump. Watch the video and follow the easy steps outlined below.

 For this project you will need the following tools:

  • A screwdriver
  • Wrench
  • Half inch socket
  • 11/16" socket
  • Diaphragm kit (2 diaphragms, 2 sets of O-rings and an air accumulator diaphragm)

Let's get started! Follow these steps:

  1. Loosen the bolts in one of the two head assemblies to remove it
  2. Remove the diaphragm nut and washer using the wrench
  3. Remove the diaphragm
  4. Remove the piston sleeve
  5. Drain the internal oil
  6. Loosen the bolts on the second head to remove it
  7. Perform steps 2-5 for the second head 
  8. Clean both sides of the pump with break cleaner
  9. Place the piston sleeve back in place in one of the two heads
  10. Place the diaphragm inside. The diaphragm has a beveled side which needs to be facing up
  11. Use the wrench to tighten the nut and washer back into place
  12. On each of the two head assemblies remove the inside valve assemble
  13. Replace the spring, valve seat (beveled side down), and large metal seat
  14. Replace O-ring with a new one
  15. The other valve assembly has the exact same parts but reversed (follow steps 13-14)
  16. Switch to the other head and perform steps 13-15 for this side as well
  17. Place the head assembly back in place on the side where you replaced the piston sleeve (step 9)
  18. Tighten bolts in a clockwise pattern to tighten evenly
  19. Switch to the other head and use non-detergent 40 weight pump oil to fill that open side
  20. Place piston sleeve back in place
  21. Clean up any excess oil
  22. Replace diaphragm, making sure that beveled side is facing up just like in step 13
  23. Use the wrench to tighten the nut and washer
  24. Place the head assembly back in place and tighten screws in clockwise pattern to tighten evenly   
  25. There is a clear bolt on the side of the pump and the oil level should be visible right in the center
  26. Remove the air accumulator head by loosening the bolts
  27. Once opened, remove the air accumulator diaphragm and replace with new
  28. Close everything back and tighten for a secure fitting
You are all done!  We sell all the parts featured in our videos so just contact us if you have any questions on this repair or the specific parts you need to order. Do you have an instructional video you'd like to see featured? Let us know in the comments below.



Topics: Diaphragm pumps, Sprayer Depot, Instructional Video, Udor Pumps, Udor Kappa, pump repair kit, Sprayer Depot Instructional Video, Diaphragm Kit, repair kit

Guest Post: 5 Ways a Control Unit Is Better Than a Relief Valve

Posted by Sprayer Depot on Wed, Jun 17, 2015

Contributed by Guest Blogger: 
Mark Techler,  Factory Representative - Hypro & SHURflo Ag and Industrial Pumps and Accessories


Sprayers with positive displacement pumps need some way to bypass the flow of liquid when the gun or boom is shut off. Let’s compare a typical relief valve, like a TeeJet S6815 series valve, to a commonly used control unit, like Hypro GS40GI, which includes a relief valve and much more.

1. The control unit includes a pressure gauge. Most spraying jobs require a particular pressure and it is convenient to have a gauge next to the controls.

2. The control unit includes separate outlets for a gun (or boom) and agitation. These outlets include ball valves for shut-off or for fine tuning the flow. A typical relief valve has only an inlet and a bypass port.

3. The control unit has a pressure adjustment and release lever that can quickly change the bypass pressure to one of three broad settings or to zero psi. A fine tuning knob is also included. A typical relief valve has only a fine tuning.

4. The control unit has all these features in a compact package that mounts on the pump. A typical relief valve needs many fittings, hoses, ball valves, a gauge, and more labor to accomplish the same functions.

5. The most valuable difference is that a control unit has a spring under the relief valve poppet that unseats the poppet when the release lever is all the way up. A typical relief valve has a main spring that pushes the ball onto the seat so that, when the sprayer is not being used, chemical accumulates and causes the ball to stick to the seat over time. When the sprayer is started again with the gun or boom off, the additional bypass pressure required to unseat the sticky ball from the seat causes a pressure spike in the system that can damage the pump. When the release lever on a control unit is moved to the open position, the poppet cannot touch the seat and cannot stick, so there is no pressure spike on the next startup. Tip: always move the release lever to the all-the-way-up position at the end of the day.

Control units, typically found on diaphragm pumps, are well worth the cost because they provide more accurate spraying and longer system life.


Shop Now


Topics: Hypro, Diaphragm pumps, sprayer, spray tips, Guest blog, relief valve, control unit

Repairing a Hypro D30 Diaphragm Pump

Posted by Sprayer Depot on Fri, Feb 06, 2015

Hypro D30 PumpIn this week’s post we wanted to shed light on some great resources we have to offer on our YouTube channel in the form of instructional videos. If you’re like me, then you’ve found yourself in a situation where you took something apart, only to find you needed a little guidance to get it put back together. Well, the team at Sprayer Depot gets that. So we put together these videos just for you, in the off chance that you forget where that one remaining bolt is supposed to go.

Today’s topic is repairing the popular Hypro D30 diaphragm pump that comes on many sprayers we carry. Now the Hypro D30 Diaphragm Pump Repair Kit comes with two diaphragms, one air accumulator diaphragm and four o-rings. There are other replacement parts that we’ve packaged for valves, etc., should you need it, but for today we’ll focus on the diaphragms.

Before we get started, a few tips that might make the repair go a little more smoothly:

  • We found that having a wide bucket handy makes draining the oil from your pump a little less messy. We used a lower-rim, but wider bucket that didn’t hinder getting to the parts while the oil drained. 
  • Also note that the diaphragms should be installed with a certain side facing the oil, as noted on the diaphragm itself. Take a second to find that marker before you get to this step.
  • Lastly take a second to grab your tools, and identify the correct size socket wrenches you’ll need so that your materials are handy before you get started.

Now that we have that out of the way, follow these instructions to repair a Hypro D30 Diaphragm Pump. Then, check out the video below for more details on the repair process:

  • Using a socket wrench, remove both bolts on either side of the head.
  • After removing the top-head assembly, remove each of the four bolts on the head to access the diaphragm.
  • Remove the diaphragm bolt and then remove the old diaphragm.
  • Remove the piston sleeve and drain the oil.
  • Remove the four bolts on the other side to reveal a second diaphragm.
  • Remove the diaphragm bolt and old diaphragm.
  • Remove the second piston sleeve.
  • Now that both piston sleeves have been removed, clean the pump with car or brake cleaner to remove excess water or oil.
  • Gather your new diaphragm pump repair kit parts so that you can reassemble the pump.
  • The piston sleeve has two holes at 12 and 6, insert the sleeve over the piston
  • Once the piston sleeve is in place, put in the new diaphragm.
  • Replace the washer and diaphragm nut using a socket wrench.
  • Replace the head and tighten with a socket wrench.
  • Add non-detergent pump oil into the other side of the unit, filling almost to the brim.
  • Replace the second piston sleeve with holes at 12 and 6.
  • Clean the excess oil.
  • Replace the diaphragm, washer and nut.
  • Replace the second head, sealing the oil inside, and tighten the bolts.
  • Now that both sides are on tight, place the two new o-rings on the base, the other two new o-rings on the head assembly.
  • Using your index and middle fingers, hold the o-rings in place on the assembly head and place the assembly head over the base.
  • Tighten the two bolts on either side of the assembly head.
  • Now we’re on to the air accumulator diaphragm. Remove the bolts.
  • Remove the old air accumulator diaphragm, replacing the new one flush in its place.
  • Replace the top and tighten the bolts.


Click here to see our complete line of sprayer parts and spray equipment. Keep in mind that orders placed by 3:30 p.m. EST will ship the same day. If you like what you see, head over to our YouTube Channel for more instructional videos.

Topics: Diaphragm pumps, Sprayer Depot, diaphragm pump, Diaphragm Pump Repair Kit, Sprayer Depot Instructional Video, Diaphragm Kit

Your Sprayer Needs an Oil Change Too

Posted by Sprayer Depot on Wed, Oct 22, 2014

We get it. There’s a ton on your plate and often some maintenance practices, like changing the oil in your sprayer, can fall by the wayside. Our technicians often get asked how often we recommend changing the oil in a pump crankcase. Of course, we defer to manufacturer recommendations, but thought it might be helpful to run through the process with one of our more popular pumps, the Hypro D30 Diaphragm Pump, especially as the sprayer season winds down.

For those of you unfamiliar with this product, Hypro diaphragm pumps come with oil in the crankcase. Unlike your vehicle, accessing oil in the crankcase take a little more effort.

The manufacturer recommends changing oil after 40 hours of break-in operation and then every three months or 500 hours, whichever comes first. So this means that you should change the oil in this particular model at least four times a year, if not more. Now Hypro recommends using its own brand of oil for this model - Hypro Oil (part number 2160-0038) is specially formulated, high-grade, nondetergent, SAE 30 weight oil designed to prolong pump life. 

Now that we have that covered, let’s talk about the three steps to changing the oil in your spray pump.

Step 1. After you’re done with your sprayer for the day, flush the pump with clean water.

Step 2. To drain the oil from the pump, remove the oil drain plug and rotate the shaft until the oil stops flowing out. If you have time to open the pump and inspect the diaphragms, now is a good time, but not mandatory.

Step 3. To fill the pump with oil, slowly pour the oil into the sight tube while turning the pump shaft. Turning the pump shaft purges all the air out of the crankcase. So you won’t have to deal with air bubbles or a less than full amount of oil. If you do decide to replace the diaphragms, always change the oil.

Hypro D30 Diaphragm Pump Schematic
Part Number 66 is the Oil Drain Plug


Need a closer look? Check out the Sprayer Depot instructional video series on our YouTube channel where we dive into the whole repair process for a Hypro D30 pump here.

One quick note, for winter storage, which we’ll get into later here on the blog, or if you encounter freezing conditions, flush the pump with a 50/50 mixture of water and antifreeze. 

Lastly, keep in mind that most manufacturers recommend changing the oil in your pump every year, if not sooner. We’d actually go as far as to say that it’s highly recommended that the oil be changed at both the start and the end of the sprayer season so that any contaminants entering the crankcase can be removed before sitting in the pump all winter and that you get rid of any buildup from the off season.

Topics: Spray Equipment Maintenance, Diaphragm pumps, Sprayer Depot, diaphragm pump, Diapgragm pumps, winterize sprayer, sprayer pumps, Sprayer Pump, Hypro D30 Pump, Sprayer Parts Guide, Sprayer Depot Instructional Video, Diaphragm Repair, oil change

Search This Blog


Shop Now

Shop All Kings Sprayers

Latest Posts