22
B. If the recirculation system is not working:
a) Disengage (turn off) clutch and shut down engine.
b) Remove two clamps on each side of the recirculation valve.
c) Slide rubber seals back and remove valve assembly.
d) Check valve assembly, recirculation nozzle in the discharge pipe, and the recirculation
pipe going into tank. Clear any obstructions.
e) Replace valve assembly and slide the seals back into place. Lubricate the outside of the
seals.
f) Replace the clamps.
3. Obstruction in the pump, which can be determined by a drop in pressure. If the drop in pressure
is accompanied by a frothy or whitish discharge stream, the blockage is in the suction line or
sump area. To clear the pump:
A. Disengage (turn off) clutch and stop the engine.
B. Loosen the suction pipe clamps. If there is material in the tank, shut off the suction line
valve.
C. Remove the clamp closest to the pump.
NOTE:
If no water comes out, obstruction is in sump area.
E. Reach into the pump and remove the obstruction. If jammed, the pump suction cover
may need to be removed.
F. Reassemble, removing pipe plug in the process.
G. Open suction line valve.
4. Obstruction in sump area, which is located at the bottom of the tank on the inside where the
suction pipe is attached:
A. Easiest: Clear the sump by backflushing through the discharge plumbing with the water
supply hose.
B. Another method: 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.
CAUTION
Do not turn the shaft backward with a pipe wrench. This will unscrew pump impeller from pump
shaft. Consequently, when clutch is engaged (turned on), the pump impeller will screw onto
pump shaft with a force great enough to break pump impeller. Failure to comply could result in
minor or moderate personal injury. Failure to comply could also result in product or property
damage.
Summary of Contents for HydroSeeder T170
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