Height Control Valve Test
- Remove height control valve. Clean exterior of valve, then connect test gauge and air pressure source to intake adaptor.
- Apply 80-100 psi. Submerge unit in water. No air should escape if overtravel lever is in neutral position. If air escapes, replace valve. Shut off air pressure and detach test gauge from air intake port.
- Plug intake port with fill valve (female end). Repeat above test. If bubbles escape from exhaust port, replace valve. If air escapes around edge of cover plate, replace gasket. After removing unit from water, actuate overtravel lever to expel any water.