OPERATION
PREOPERATION PROCEDURES
CHECK POWER SOURCE
1.Using a calibrated flow meter and pressure gauge, make sure the hydraulic power source develops a flow of
140 bar.
2.Make certain that the power source is equipped with a relief valve set to open at
3.Make certain that the power source return pressure does not exceed 250 psi/17 bar.
4.Make sure the trash pump inlet is clear of debris. Remove any obstruction before operating.
CONNECT HOSES
1.Wipe all hose couplers with a clean lint free cloth before making connections.
IMPORTANT
Do not connect pressure to the return port. Motor
shaft seal limit Is 250 psi/17 bar.
2.Connect the hoses from the hydraulic power source to the couplers on the trash pump or trash pump hoses. It is a good practice to connect return hose first and disconnect it last to minimize or avoid trapped pressure within the trash pump motor.
NOTE:
If uncoupled hoses are left in the sun, pressure in- crease inside the hoses might make them difficult to connect. Whenever possible, connect the free ends of the hoses together.
3.Observe the arrow on the couplers to ensure that the flow is in the proper direction. The female coupler on the trash pump is the inlet (pressure) coupler.
PUMP OPERATION
1.Observe all safety precautions.
2.Attach a
Do not attach a nozzle to the outlet end of the dis- charge hose. For
3.Attach a rope or cable to the trash pump’s handle. Lower the trash pump into the liquid to be pumped. Do not raise or lower the trash pump by its hoses or couplers to avoid damage to the hoses or couplers.
IMPORTANT
Never point the hose at bystanders.
4.Turn on the hydraulic power source. Watch for sol- ids in the liquid being pumped. If solids are exces- sive, the discharge flow might decrease. If this hap- pens, stop the pump and check for the cause of the problem.
Under some conditions, the liquid being pumped might be slowed enough so it can no longer push particles in the liquid. If this happens, particles can accumulate in the pumping chamber, causing fur- ther restriction. The impeller then acts as a “grinding wheel” which causes accelerated trash pump wear.
Reduced liquid flow can be caused by the following:
•The trash pump sinks into solids at the bottom of the hole.
•The end of the outlet hose is too high, causing an excessive lift height for the column of liquid being pushed by the trash pump. This slows the flow of liquid to a level where it can no longer carry solids.
•The flow and pressure of hydraulic fluid to the trash pump is too low, which reduces impeller speed. A 20 percent decrease in hydraulic fluid flow can reduce pump performance by 50 per- cent. When operating at reduced hydraulic flow and pressure, the end of the outlet hose should not be more than 30 ft/9 m above the liquid.
NOTE:
It will not damage the pump to operate it “dry.”
10 ► TP03 User Manual
