Schou Grouw 95678 Manual De Instrucciones página 69

PROBLEM
The safety valve does not
engage at pressures over
3,0 bar ≈ 38 strokes
No spray jet
Uneven spray jet
Spray action without trig-
ger press
Liquid flows out of the
pump
Liquid flows out of the
trigger unit
Liquid flows out of the
pressure valve
Liquid flows out from the
back of the nozzle
Leakage in other places
POSSIBLE CAUSE
The safety valve is faulty (6)
The suction hose filter is clogged
Pressure is insufficient
Nozzle (3) is clogged
Pressure is insufficient
Trigger unit (8) is faulty
Pressure valve (7) is faulty
The pump diaphragm is faulty
The pump piston O-ring is faulty
Trigger unit (8) is faulty
Trigger unit O-ring (8a) is faulty
Pressure valve (7) is faulty
The spray lance O-ring (4c) is
faulty
Nozzle (3) is not screwed suffi-
ciently to the spray lance (4)
The nozzle O-ring is faulty
Loose connection
Faulty O-ring
The suction hose (10) is damaged
69
SOLUTION
Replace the safety valve (6)
Have the suction hose (12)
checked
Build up pressure
Clean the nozzle (3)
Build up pressure
Replace the trigger unit (8)
Replace the pressure valve (7)
Have the pump diaphragm
replaced
Have the pump piston O-ring
replaced
Replace the trigger unit (8)
Replace the trigger unit
O-ring (8a)
Replace the pressure valve (7)
Replace the spray (4c)
Tighten the nozzle (3)
Have the nozzle O-ring
replaced
Tighten connection
Replace O-ring
Replace the suction hose (10)
GB