Hydramaster CDS4.8


New Member
Jan 26, 2023
Real Name
Jason Hanson
Hi all, having issues with RPM bogging down under a heavy vaccuum load. Took it to a local hydramaster repair tech and they suggested replacing the brake switch that they thought was faulty. This did not fix the problem and am wondering if anyone has some ideas what to look for in this case? CDS drops under 1000 rpm and loses quite a bit of power when vac is plugged or under heavy water load but doesn't power down and kicks right back to 1500 when not stressed. My vac lines arent plugged/collapsed so that isn't the issue. This problem doesn't happen every time I clean but this week its happened at a majority of jobs so I need to get it taken care of ASAP. Thanks in advance for any help!