Solo Diaphragm Pump Repair Kit

A backpack sprayer's pump does the work, and its diaphragm is the part that wears. When a pump starts losing pressure, spitting or leaking at the valve, a repair kit gets it spraying again without a new sprayer. This Solo kit collects the wear parts that usually go first.

The kit includes a diaphragm, valve plates and O-rings, plus a spring and plug for the pressure regulating valve on select models. Those are the parts you would replace together during a rebuild, so one kit covers the job in one trip to the bench. They are genuine Solo replacement parts.

Highlights

• Complete wear-parts kit for diaphragm pump rebuilds
• Diaphragm, valve plates and O-rings included
• Spring and plug for the pressure regulating valve on select models
• Fits Solo 475-B, 485, 473-D, 475-B-DELUXE and 475-101 backpack sprayers
• Genuine Solo replacement parts

Why rebuild the pump instead of replacing the sprayer

A diaphragm pump is built around a few wear parts. Replacing them is a smaller job than buying a new sprayer, and the tank, wand and frame stay in service. A torn diaphragm becomes a bench job instead of a lost spraying day.

It suits the orchard or fence-line worker with a backpack sprayer that is still sound, the homeowner who wants a spare pump kit on the shelf, and the farm shop that keeps spare parts on hand for its sprayers.

At a glance

How to use it

1. Empty the tank, relieve the pressure, and rinse the pump with clean water before you open it.
2. Lay the parts out in order on a clean bench or tray, so the small O-rings and springs don't roll away.
3. Inspect the valve plates and O-rings while the pump is open, and replace worn parts together.
4. Fit the new diaphragm and valve plates, and check the spring and plug on the pressure regulating valve if your model uses them.
5. Reassemble the pump, then test it with clean water before you add any solution.

Good to know

• Check the sprayer model before you order, since the pressure regulating valve parts fit select models.
• Keep a spare kit on the shelf so a torn diaphragm doesn't stop a spraying job.
• Rinse the sprayer after each job and store it empty and dry, so chemicals don't sit in the pump.
• Keep a spare hose and nozzle on hand for the same sprayer.

About Solo

Solo has been building equipment since 1948, when the Emmerich brothers designed a small two-stroke engine. Today Solo makes backpack, handheld and one-hand compression sprayers, along with blowers, spreaders and cut-off machines.

Put a kit on the shelf before the next spraying job.