What is the difference between the Wacker Neuson PG2 and PG3 dewatering pumps?
The main difference is engine size and pump capacity. The PG2 is powered by the Wacker WM130 4HP engine (or Honda GX120 in the PG2A) and is a 2" pump designed for lower-flow dewatering applications. The PG3 uses the Wacker WM170 6HP engine (or Honda GX120-Wkt2 in the PG3A) and offers higher flow rates through a 3" discharge. Both are lightweight, portable centrifugal pumps suitable for moving clean to lightly contaminated water. Free parts diagram downloads are available for both models — and all four variants (PG2, PG2A, PG3, PG3A) — directly on our site.
What are the most commonly replaced parts on a Wacker Neuson PG2 or PG3 dewatering pump?
The most frequently serviced components on the PG2 and PG3 are carburetor parts (bowl, jets, idle jets), engine gasket sets, and hose assemblies. The WM130 and WM170 engines are generally reliable but benefit from regular spark plug changes, air filter service, and carburetor cleaning if the pump has been stored with fuel. The pump crankcase and related internal components are less commonly replaced but available through DHS Equipment for major rebuilds. Free parts diagram downloads for each model and revision are available to help you identify the correct part number before ordering.
What is a dewatering pump used for on a construction site?
A dewatering pump is used to remove clean or lightly contaminated groundwater from excavations, trenches, and footings — situations where the water is relatively clear and doesn't contain heavy solids. The Wacker Neuson PG2 and PG3 are centrifugal pumps best suited for this application. For water containing significant sludge, mud, or solids, a trash pump (PT series) or diaphragm pump (PDI/PDT series) would be a better choice. Matching the pump type to the application protects both the equipment and ensures efficient water removal.
What is the difference between the WM130 engine (PG2) and the WM170 engine (PG3)?
The Wacker WM130 is a 4HP, 130cc air-cooled gasoline engine used in the PG2 dewatering pump. The WM170 is a more powerful 6HP engine used in the PG3. Both are Wacker Neuson proprietary engines with threaded crankshaft ends that mate directly to the pump impeller. Engine parts including carburetor components, gasket sets, and complete engine assemblies are stocked by DHS Equipment for both models. The Honda GX120 engine used in the PG2A and PG3A variants has its own separate parts catalog.
Where can I find a free parts manual for my Wacker Neuson PG2 or PG3?
DHS Equipment offers free parts diagram downloads for the PG2 (Rev 100 and Rev 200), PG2A (Rev 100 and Rev 200), PG3 (Rev 100 and Rev 200), and PG3A (Rev 100 and Rev 200) dewatering pumps directly on our site. These free downloads are listed on the product page for each model. If you need help identifying a part or can't locate your specific revision, contact us at [email protected] or call 866-611-9369.