10
306-993
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 8.
Before servicing this equipment always make sure to
relieve the pressure
.
Note:
Check all possible problems and solutions
before disassembling.
Problem
Cause
Solution
Excessive surge at spray nozzle
Obstructed spray tip, valve, or hose
Clean, clear
Excessive surge at spray nozzle
Cleaning solution supply empty
Refill
Clogged intake filter, kinked or col-
lapsed suction hose
Clean, unkink
Fluid leaking from valve
Loose packing nut or worn packings
See manual 307–010
Valve will not stop dispensing
Valve not adjusted properly
See manual 307–010
Valve will not stop dispensing
Dirty or worn valve stem or seat
Clean, clear, or replace – See manual
307–010
Valve will not stop the pump
Cleaning solution supply empty
Refill
Valve will not stop the pump
Clogged intake filter, kinked or col-
lapsed suction hose
Clean, unkink
Dirty or worn valve stem or seat
Clean clear, or replace – See manual
307–010
Dirty or worn fluid piston or packings
Service – See pump manual
Pump operating, but spray pres-
sure low on up stroke.
Dirty or worn fluid piston or packings
Service – See pump manual
Pump operating, but spray pres-
sure low on down stroke
Dirty or worn fluid intake valve
Clean, clear, or replace – See pump
manual
Pump operating, but spray pres-
sure low on both strokes
Clogged intake filter, kinked or col-
lapsed suction hose
Clean, unkink
sure low on both strokes
Dirty or worn fluid piston or packings
Service – See pump manual
Dirty or worn fluid intake valve
Clean, clear, or replace – See pump
manual
Loose packing nut or worn packings
Tighten, replace – See pump manual
Fluid will not come from pump
(hose removed)
Restricted air line
Check for closed valve; use larger
supply hose
(hose removed)
Pump throat packing nut too tight
Loosen
Pump air motor not working
Service – See pump manual
System will not spray
Restricted air line
Check for closed valve; use larger
supply hose
Pump air motor not working
Service – See pump manual
