Description

When you’re spraying acres of crops or washing equipment, you need a pump that keeps the pressure steady and the flow consistent. This AR503 triple diaphragm pump delivers exactly that—with three chambers working together to smooth out pulsation and maintain even coverage whether you’re applying chemicals or moving liquid around the farm.

What You’re Getting

Triple diaphragm design reduces pulsation for smoother, more even spray patterns
Built-in AR1639 gearbox lets you run at optimal speeds without over-revving your tractor
Pump-mounted RM40 control module gives you precise pressure management right at your fingertips
14.3 GPM flow rate with 580 PSI capability handles everything from field spraying to equipment washing
Chemical-resistant construction stands up to herbicides, pesticides, and cleaning solutions

Built for Real Farm Work

This pump shines on sprayers, wash systems, and liquid transfer setups where you need reliable pressure and flow. The medium-pressure range makes it perfect for boom sprayers applying herbicides and pesticides, high-pressure washers cleaning equipment, or any application where you’re moving chemicals or water with precision. The 1-1/4 inch inlet handles good volume while the 3/4 NPT outlet gives you flexibility in plumbing.

Made to Last

AR builds these pumps to handle the chemicals and conditions that come with farm work. The diaphragms resist swelling and cracking from agricultural chemicals, while the gear reduction keeps operating speeds in the sweet spot for long pump life. The control module is built tough enough to handle the vibration and weather that’s part of everyday spraying.

Good to Know

The gearbox reduction means you can run this pump off your tractor’s PTO without worrying about over-speeding—just match your PTO speed to the pump’s requirements. The control module mounts right on the pump, so you don’t need extra brackets or remote mounting. Make sure your chemical tank has proper agitation to keep everything mixed while the pump’s running.