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WSC55 SERIES CHEMICAL SPRAY CART • OPERATION AND PARTS MANUAL — REV. #1 (08/30/19) — PAGE 45
TROUBLESHOOTING (SPRAY CART)
Troubleshooting (Spray Cart)
Symptom
Possible Problem
Solution
Pump does not prime
Leak in suction line?
Check hose and fi ttings for leaks and correct.
Obstruction in suction line?
Inspect hose for obstructions such as debris
or loose inner liner and remove from the line.
Suction hose sucked to bottom or side of
tank?
Cut a notch or “V” in end of suction hose.
Rollers stuck in pump?
Disassemble pump and inspect rollers.
Pump seals leaking air?
Replace seals.
Pump turning in wrong direction?
Correct rotation of pump.
Loss of pump pressure
Clogged suction strainer?
Check strainer and clean regularly.
Kinked or blocked suction hose?
Inspect suction hose and repair as necessary.
Air leak in inlet side plumbing?
Check hose and connections for leaks. Use
pipe joint sealant and retighten connections.
Relief valve setting too low or weakened
spring?
Check relief valve and correct setting or
replace spring.
Faulty gauge?
Replace gauge.
Pump seals leak air?
Replace seals.
Nozzle orifi ces worn?
Replace nozzles.
Pump worn?
Repair pump.
Pump will not turn
Corrosion (rust), scale or residue?
Replace pump.
Solid object lodged in pump?
Disassemble pump and remove object.
Pump hydraulic system overheating
Insuffi cient hydraulic hose size?
Check hydraulic hose size. Hose should be
at least 1/2" (13 mm). For large open-center
systems, hose should be 3/4" (19 mm).
Parking brake will not hold
Brake linkage out of adjustment?
Inspect brake linkage. Adjust linkage
fasteners as necessary.
Erratic spray output—overapplying and
underapplying
Worn or damaged spray tip?
Replace spray tip.