AR42118 Kit,Unloader RM Series

The AR42118 Unloader Kit for RM Series high pressure pumps used on various equipment made by AR North America.


The AR42118 Unloader Kit is the Original Equipment AR replacement Unloader.

This AR42118 Unloader Kit consists of the following parts:
1 x AR2760400 Piston
1 x AR2260100 O-Ring
1 x AR660190 O-Ring
1 x AR2760210 Ring
1 x AR2840750 Piston Guide
4 x AR740290 O-Ring
1 x AR820510 O-Ring
1 x AR2840760 By-pass Jet
1 x AR2840770 Seat
1 x AR1470210 O-Ring
1 x AR1980300 Nut
1 x AR392840 Grub Screw
1 x AR2760480 Handle Insert
2 x AR1980220 Plate Spring
1 x AR2760410 Spring


The AR42118 was used on the Annovi Reverberi RMW, RMV, SRMW, series pressure washer pumps also known as AR pumps.

AR42118 includes a replacement unloader seat which comes tapped with M6-1.0 threads to aid in replacement.