Description

The Comet ZWD3035G-K is an industrial-grade, direct-drive triplex plunger pump designed for gasoline engines. It is a staple in the commercial pressure washing industry because it combines high pressure (3500 PSI) with a manageable flow rate (3.0 GPM), making it ideal for surface cleaning and heavy-duty degreasing.

Technical Specifications

• Flow Rate: 3.0 GPM (11.4 LPM)

• Max Pressure: 3500 PSI (241 bar)

• Speed: 3400 RPM (Gas Engine Speed)

• Shaft Size: 1″ Hollow Shaft (Standard for 8 HP to 13 HP engines).

• Flange: SAE J609B (4-bolt gas engine mounting).

• Unloader: Built-in “K” style unloader (Integrated into the manifold).

• Manifold: Forged brass for high-pressure durability.

Key Features & Maintenance

• Direct Drive: Designed to bolt directly onto engines like the Honda GX270 or GX390. Note that the 1″ shaft is specific to larger engines; ensure your engine shaft isn’t the smaller 3/4″ size.

• Integrated Unloader: The “K” version includes a built-in unloader valve. This simplifies the plumbing but means that if the unloader body fails, you are usually servicing the manifold itself.

• Ceramic Plungers: Uses 15mm solid ceramic plungers that resist heat and corrosion.

• Sight Glass: Features a rear-mounted oil sight glass. Always use non-detergent ISO 68 pump oil.

Essential Service Kits

Since this pump operates at high RPM (3400), the seals and valves are subject to significant wear and tear.