How to Repair a KMT Style Bleed-Down Valve Using Kit #12593

Always make sure all high-pressure water has been removed from the valve by the following machine manufacturers' safety instructions. Failure to do so can cause severe injury or death.

Turn OFF all water pressure to the on/off valve.

The valve components can be replaced with the valve body mounted to the pump.

Loosen the high-pressure tubing from the high-pressure gland fitting using a 5/8" and 1" wrench.

Unthread the high-pressue tubing from the high-pressure gland fitting.

Loosen the high-pressure gland fitting using a 1-1/8" wrench.

Unthread the high-pressure gland fitting from the valve body.

Disconnect the air line from the actuator.

Unthread the actuator from the valve body.

Remove all the valve components from the valve body with the included dowel.

Thoroughly clean theinterior of the valve body with isopropyl alcohol or a similar cleaning agent before replacing the components.

Visually inspect the top and bottom of the valve bore for cracks/blemishes. If excessive wear or cracks are visible, replace the valve body.

Slide the O-ring on to the point of the valve stem.

Slide the stainless steel back-up ring on to the valve stem point with the chamfer side towards the O-ring.

Slide the brass back-up ring on to the valve stem point with the chamfer side away from the stainless steel back-up ring.

Put the hoop on the high-pressure seal with the sharp edge of the hoop towards the seal.

Slide the hoop and the high-pressure valve seal onto the valve stem with the hoop towards the brass back-up ring.

Apply high-pressure lubricant to the outside diameter of the high-pressure valve seal.

Put the point of the valve stem into the valve body.

Push the valve stem with the dowel until it bottoms out.

Clean the actuator threads of all Blue Goop with isopropyl alcohol or a similar cleaning agent.

Apply Blue Goop to the actuator threads.

Thread (hand tighten) the actuator into the top of the valve body until it bottoms out.

Reconnect the air tube to the actuator.

Clean the high-pressure gland fitting of all Blue Goop.

Reapply Blue Goop to the threads of the high-pressure gland fitting.

Put the seat into the top of the high-pressure gland fitting with the flat side towards the gland fitting.

Apply Blue Goop to the top of the seat.

Thread the high-pressure gland fitting into the bottom of the valve body.

Tighten the high-pressure gland fitting using a 1-1/8" wrench.

Clean the high-pressure tubing threads and cone of all Blue Goop with isopropyl alcohol or a similar cleaning agent.

Reapply Blue Goop to the high-pressure tubing threads and cone.

Thread in the high-pressure tubing to the bottom of the high-pressure gland fitting.

Apply water pressure to the valve assembly to verify there are no leaks.

Re-install the cutting head and continue the cutting process.

Re-install the cutting head and continue the cutting process.