We are halfway through spray season and you know what that means, time for routine maintenance to keep your sprayers working like a well-oiled machine. Most manufacturers recommend this regular upkeep every three months, with more attention needed during this heavy use time of year. Here we’ll cover three sprayer pump types – diaphragm, centrifugal and roller – and provide the information you need to know to ensure smooth operation for the remainder of the season.
First, you’ll need a pump repair kit. Repair Kits are unique for each type of pump and include durable items intended to repair components that see more wear-and-tear or need extra attention every few months. You will notice o-rings, seals and diaphragms in these kits, among other components. So let’s take a closer look:
D30 Diaphragm Pump Repair Kit (Item #9910KIT1724)
Hypro recommends changing diaphragms every 3 months or 500 hours.
Watch this video for a closer look at how to install a pump repair kit.
If the oil in the sight glass on the pump turns a milky color or oil comes out of the discharge port you most likely have a diaphragm rupture.
Diaphragms are the main wear part on the pump and separate the oil-filled crankcase from the chemical you are spraying. Failure to change diaphragms regularly, or run the pump with ruptured diaphragms, will cause pump failure – and a lot of headache.
7560 Series Roller Pump Repair Kit (Item #34300381)
Roller pump repair kits include new seals, rollers and o-ring for the endplate.
If your pump does not prime or experiences loss of pressure, this can be caused by stuck rollers or seals leaking air. If the pump shaft will not turn there may be solid objects caught inside the pump or the pump itself may need to be replaced.
Before ordering a repair kit, press the pump apart and inspect the body and endplate for lips or indents. If you find lips or indents the pump will need to be replaced. If the body and endplate are in good condition, installing a repair kit will have the pump running to specs.
Hypro Cast Iron Centrifugal Pump Repair Kit (Item #34300332)
Centrifugal pump repair kits include the mechanical seal, flat gasket and body o-ring.
If liquid is leaking out of the weep hole on the pump this indicates the seal is worn. This can be caused by running the pump dry or from failure to flush the pump out after use.
If you are experiencing low discharge output the impeller might be scarred or clogged. Impellers are not included in the repair kit, but are sold separately.