Find answers to some of the most common questions about John Blue pumps, including pump setup, maintenance, replacement models, oil requirements, winterization, and more. Click on any question below to view the answer.
Piston Pump FAQs
What size sprocket comes standard on a John Blue piston pump?
John Blue piston pumps come standard with an 18-tooth sprocket for #50 roller chain.
What type of oil should I use in a John Blue piston pump?
Use 90W gear oil in John Blue piston pumps. Refer to your pump’s manual for additional maintenance and lubrication information.
What replaces the John Blue LM-1255 piston pump?
The NGP-4055-F is the replacement for the LM-1255.
What replaces the John Blue LM-2455 piston pump?
The NGP-6055 is the replacement for the LM-2455.
What replaces the John Blue LM-4455 piston pump?
The NGP-7055 is the replacement for the LM-4455.
What replaces the John Blue LM-4955 piston pump?
The NGP-9055 is the replacement for the LM-4955.
What is the difference between the NGP-6050, NGP-6055, NGP-6058, and NGP-6059?
The primary difference between these John Blue piston pump models is the drive or clutch configuration:
- NGP-6050: Rope-pull clutch
- NGP-6055: No clutch
- NGP-6058: Electric clutch
- NGP-6059: Hydraulic clutch
Can I rotate the wet end of a John Blue piston pump 90 degrees?
Yes. The wet end can be rotated 90 degrees as long as the valve cover remains facing upward.
Can I convert a ground-drive piston pump to hydraulic drive?
Yes. A John Blue ground-drive piston pump can be converted to hydraulic drive using one of our VRH Hydraulic Drive Kits.
[View VRH Hydraulic Drive Kits →]
How do I determine the correct setting for my John Blue piston pump?
Use our online Metering Pump Calculator to determine the correct pump setting for your application.
[Use the Metering Pump Calculator →]
For additional assistance, contact John Blue at 1-800-253-2583.
What is the difference between the NGP-6055 and NGP-6055-HY?
The NGP-6055 is a ground-driven piston pump, while the NGP-6055-HY is hydraulically driven.
Centrifugal Pump FAQs
What fluid is in the reservoir of a John Blue centrifugal pump?
The reservoir on applicable John Blue centrifugal pumps contains 50/50 antifreeze/water mixture.
What does the “-BS” suffix on my John Blue centrifugal pump mean?
The -BS suffix indicates that the pump was built with a 1-inch shaft and gas engine adapter for use with an appropriate gas engine.
Diaphragm Pump FAQs
What type of oil should I use in a John Blue diaphragm pump?
Use 30W non-detergent oil in John Blue diaphragm pumps. Refer to your pump’s manual for additional maintenance information.
Pump Maintenance & Winterization
How do I winterize my John Blue pump?
Fill the pumping cavity with RV antifreeze and plug the inlet and outlet ports to help protect the pump during storage.
For additional instructions, refer to our pump winterization videos.
How often should I change the oil in my John Blue pump?
We recommend including your pump’s oil change as part of a regular annual maintenance schedule, unless unusual operating conditions or problems require more frequent service.
Still Have Questions?
The John Blue team is here to help!
Can’t find the answer you’re looking for? Call us at 1-800-253-2583 or contact us at info@johnblue.com for additional product and technical support.