Leak Test
- Remove height control valve. Clean exterior of valve and connect test gauge and air pressure source to intake adaptor. Apply 90 psi. Submerge unit in water. No air should escape if overtravel lever is in neutral position. If bubbles escape, replace valve. If air escapes around the edge of valve cover plate, gasket must be replaced.
- Shut off air pressure and detach test gauge from air intake port. Plug intake port with fill valve. Repeat test described in step 1). 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.