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Sometimes when a stoppage occurs, you will not be able to find anything in the line. When this
happens, it means the system became airbound instead of plugged. To remedy this, see “Foaming”.
Plugging can occur in any 1 of 4 places; the valve and recirculation nozzle, the discharge nozzle, the
pump area and the sump area. Plugging is caused by either foreign objects or dewatered fiber.
A. Obstruction in the discharge nozzle is determined by a change or stoppage of spray pattern.
a) Disengage (turn off) the clutch.
b) Remove the nozzle.
c) Clear the nozzle with the nozzle cleaning rod attached to the underside of the
guard rail (platform option only).
DANGER:
Severe injury can result from opening clamps when piping is
hot. Before loosening any clamps, determine if the pipe is
hot. If so, let it cool before attempting repair.
B. If the recirculation system is not working:
a) Disengage (turn off) clutch and shut down engine.
b) Remove clamp attaching recirculation valve.
c) Slide rubber seal back and remove valve assembly.
d) Check valve assembly, recirculation nozzle in the discharge pipe, and the recir-
culation pipe going into the tank. Clear any obstructions.
e) Replace valve assembly and slide seal back into place. Lubricate outside of
seal.
f) Replace clamp.
3. Obstruction in pump can be determined by a drop in pressure. If drop in pressure is accompanied by
a frothy or whitish discharge stream, blockage is in suction line or sump area. To clear the pump:
A Disengage (turn off) clutch and stop engine.
B. Loosen suction pipe clamps. If material is in the tank, stuff a rag into the suction piping.
C. Remove the clamp closest to the pump.
NOTE:
If no water comes out, it means the obstruction is in sump area.
E. Reach into the pump and remove the obstruction. If jammed, the pump suction cover may
have to be removed.
F. Reassemble, removing pipe “plug” in process.
G. Remove the rag plugging the suction piping.
4. Obstruction in the sump area, which is located at the bottom of the tank on the inside where the suc-
tion pipe is attached:
A. The easiest way to clear the sump is to back flush through the discharge plumbing with the
water supply hose.
B. Another method is to remove the drain plug and run a long pole through the opening and
into the sump area. Remove the obstruction and replace the drain cap.
C. Use a pipe or pole through the loading hatch opening to dislodge the obstruction
