Graco SDP8 Series Installation And Operation Manual page 39

Problem
Metered dispense valve
leaks from cover/control
Metered dispense valve
leaks from twist lock nozzle.
It is important to distinguish
between the two causes of
this problem. A new nozzle
will NOT correct a fluid leak
caused by a faulty valve.
Metered dispense valve
leaks from swivel
Unit does not stop
dispensing when assumed
preset amount is dispensed.
Screen locks up or freezes
3A6673B
Cause
Poor seal at metering cover
chamber
Twist lock nozzle has a
damaged seal.
Valve has damaged or
obstructed seals.
Poor swivel/hose
connection.
Poor swivel/metered
dispense valve housing
connection.
Swivel seals have
deteriorated and leak.
Valve is dirty or seals are
defective.
Low battery.
Solenoid not functioning
Firmware Issue
Troubleshooting
Solution
Contact your Graco
distributor for repair or
replacement.
Replace nozzle. See Install
the Nozzle, page 12.
Replace valve cartridge.
Replacement Kit part
25D904.
Apply PTFE tape (leave a
minimum of two engaged
threads uncovered for
electrical continuity) or
sealant to threads of hose
and tighten the connection.
Torque the fitting to 20-25
ft.-lb (27.12 - 34 N•m).
Replace swivel. Use Swivel
Seal and Filter Replacement
Kit 25D906. See Pulse
Metered Dispense Valve
Repair manual.
Replace valve cartridge.
Replacement Kit part
25D904.
Replace batteries, page 35.
Replace solenoid.
Remove batteries. Wait five
minutes, then replace
batteries and restart.
39