JDMSPEED Pressure Washer Pump Head Assembly for Troy-Bilt RMW 2.2 GPM — Aluminum, Direct-Fit AR42940 Replacement

The JDMSPEED AR42940 pump head assembly is a direct replacement pump head designed to restore pressure and stop leaks on compatible Troy-Bilt 2.2 GPM pressure washers.

If your Troy-Bilt RMW-series pressure washer is losing pressure, leaking from the pump head, or has experienced premature pump failure, this JDMSPEED pump head assembly is built to address those issues. Made from high-grade aluminum alloy with upgraded welding for improved sealing, it matches the fit and function of OEM part numbers AR42940, AR42518, and AR3061 for 2.2 GPM units. Note: this unit is intended only for 2.2 GPM pumps and is not compatible with higher-flow SRMW 2.3–2.5 GPM models.

How does this pump head restore lost pressure and stop leaks?

The assembly uses upgraded welding and tighter cast tolerances to improve the seal around internal passages, preventing common leak points. Replacing the old or cracked pump head eliminates worn seals and restores optimum water flow and pressure performance.

• Advanced welding reduces seepage through the casting.
• Precision machined surfaces improve gasket sealing.
• Direct-fit replacement for OEM AR42940-style pump heads.

Which Troy-Bilt models and part numbers is it compatible with?

This pump head fits several Troy-Bilt RMW-series pressure washers specified at 2.2 GPM flow and up to 2800 PSI. Confirm your model’s flow rating before purchase because models rated 2.3–2.5 GPM are not supported by this part.

• Compatible models: RMW2.2G24, RMW2G24, RMW2G20, RMW2.2G20D, RMW2G23B, RMW2G25, SRMW2.2G26.
• Replaces OEM numbers: AR42940, AR42518, AR3061.
• Maximum specs: 2.2 GPM flow and up to 2800 PSI pressure.

What materials and construction features improve durability?

JDMSPEED builds the pump head from a high-quality aluminum alloy that keeps weight down while resisting corrosion and heat. The combination of durable material and refined welding extends the service life compared with older, worn castings.

• Aluminum alloy body for corrosion and heat resistance.
• Lightweight design that reduces mechanical stress on mounting points.
• Improved sealing and machining for longer-term reliability.

Are there installation or compatibility cautions I should know?

Installation is straightforward for a user familiar with basic pressure-washer maintenance, but confirming the pump’s flow rating is essential. Using this head on higher-flow pumps may cause damage or leaks because the part is only rated for 2.2 GPM operation.

• Do not install on SRMW 2.3G28, 2.4G28, or 2.5G28 models.
• Check current pump flow (2.2 GPM required) before ordering.
• Follow torque specs and seal/gasket replacement recommendations during install.

Who is this for? This JDMSPEED AR42940 pump head assembly is for Troy-Bilt owners and independent service technicians who need a robust, OEM-compatible replacement for 2.2 GPM pressure-washer pumps. Choose this part if you want a cost-effective fix for pump leaks, reduced pressure, or a failing pump head without replacing the entire pump. If your machine is rated above 2.2 GPM, select a compatible higher-flow assembly instead to avoid performance problems.