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Happy to help ! Depending on the application 5,3, or 2HP would work. Will show Model 516 as example; * produces 3 GPM @ 713 RPM, 2HP when pressure is set to 1000 psi. * produces 3 GPM @ 713 RPM, 3HP when pressure is set to 1500 psi. * produces 4 GPM @ 950 RPM, 3HP when pressure is set to...

Do not remember where I heard or read this riddle ..... A bat & ball together cost $1.10, the bat was 1.00 more than the ball. How much was the ball ? ... ... ... A = 5 cents Greg @ Arimitsu Pumps

Putting this out there for idea sharing...….. https://www.quickattach.com/i-30497660-ez-dig-utility-digging-backhoe.html Happy to help ! Greg @ Arimitsu Pumps

Different pumps can use the same drive end (crankcase), however the plunger diameters should remain the same with each pump model. Example; 3545 plunger diameter = 45mm 3535 plunger diameter = 40mm 3520 plunger diameter = 32mm Happy to help ! Greg @ Arimitsu Pumps

1725 rpm / 900 rpm Each pump valve opens & closes 28.75 times per second when pump rpm is 1725, by comparison each pump valve opens & closes 15 times per second when pump rpm is 900. Be mindful of "thermal transfer" from motor shaft thru pump shaft on direct drive. Belt drive has no...

Hi Stampede & Guests, Happy to help ! Best thing you can do for any plunger pump is to give it a good water supply. Plunger pumps are positive displacement, so give them plenty of water at the inlet - refrain from starving them too much. Change your high pressure seals at the same time you...

Hi CarWashHelp, 1-groove vs. 2-groove; 1-groove is common when using "B" belt. 2-groove may be seen when using the narrower "A" belt, especially when smaller pulleys are used. Belt to pulley contact decreases as pulley diameter decreases. Without knowing the nozzle size you use, the best I...

Hi loewem, Keep in touch regarding the pulley sizes. This will help calculate pump flow and advise max psi without overlading the 3hp motor/electrical components. Application note; A #8 nozzle needs nearly 4.8 gpm to obtain 1400 psi. Approx. 4-1/2 hp is necessary to drive pump delivering...

Thank you Soapy for sharing data, it is helpful reference ! I formatted your information to column form, and added 1200 PSI measurements and GPM flow. Please check for discrepancies as I could not find the formula. Foot lbs. rating for #05 - #08 nozzles (GPM flow through the nozzle is shown...

Hi loewem, To assist with checking the load/HP requirement, keep in touch about the pulley diameters being used and pressure setting. Were the pulley diameters changed when you put new ones on ? Good luck today - Happy to help ! Greg Thoennes Arimitsu Pumps

Hi MDrost1, Not that this is the case but it sounds like the pump may be struggling to get water. Check & replace the hose feeding water to the pump. Don't know the age of your equipment but over time hoses can break down internally, restricting water flow to pump. Good Luck - Happy to help...

Hi Rudy, Yes repair can be done and it appears you have good resources here for spare parts. I see you also asked about model 508, additionally models 511, 516, & 313 are common. It will be ideal to know the following when selecting a new pump; * Application; single gun, dual gun, or other ...

I.B. & cwguy, The Arimitsu literature is consistent at 2300 PSI for the model 516 pump, I do not find the 2500 PSI spoken about ? slash007, the upgrade video shown in the diamondwash post is helpful. https://www.youtube.com/watch?v=_JHWckbuh8g Happy to help ! Greg @ Arimitsu Pumps ph...

Here is helpful video tutorial regarding Nozzle, Pulley, and HP calculations; http://arimitsupumps.com/html/arimitsu-pump-repair-video.php * click "Technical Tips" Happy to help, Greg.

Hi Mike, You likely initially had stuck inlet valves. Whether pump is new or used it may flukeishly happen when idle for years. * The best way to free valves and to avoid seal damage; Connect a garden hose to the pump inlet and run the pump. In your case, hooking air to the pump...

Try a couple items that will dirty things up, ie; cheerios, crackers, pretzels, etc. for the kids. Bonus if you charge for vacuums. Greg Thoennes Arimitsu Pumps Sales & Tech Support

pre gun tank getting hot Hi Mogustus, Check the high pressure hose, spray tips and spray guns for blockages. Water will heat up faster in the tank if more water is being bypassed to it. Good Luck & Keep in touch, Greg @ Arimitsu Pumps 763-205-8341

Pulsation Dampeners A search on "Pulse Hose" will save you money and be as effective as a dampener. Good advice in above postings. If you have a pump which is abnormally pulsating, a dampener is not the cure, it will only "mask" other issues. Begin by checking to insure the pump is...

Midwast Carwash Expo 2013, Feb 5-6 Hi Bubbles, Happy to help, I'll put your name on 1. PM or phone your preference. Greg Thoennes Arimitsu Pumps 763-205-8341

Midwast Carwash Expo 2013, Feb 5-6 I have a handful of show passes to give away for the MCA Carwash Expo, Feb 5-6 2013 in Novi MI. The passes are valid for admittance to the show floor and the educational sessions. Thank you, Greg Thoennes Arimitsu Pumps 763-205-8341