Graco e-Xtreme Operation, Repair, And Parts page 19

Problem
Problem Problem
Erratic or accelerated
pump speed
Cycles or fails to hold
pressure at stall
Air bubbles in fluid
Poor finish or irregular
spray pattern
Driver does not turn
over and LED is off
Driver does not turn
over and LED is on
Oil is leaking
To determine if the fluid hose or gun is obstructed, follow the
*
fluid hose and place a container at pump fluid outlet to catch any fluid. Turn pressure adjustment knob just
enough to start the pump. If the pump starts, the obstruction is in the fluid hose or gun.
3A3164D
Cause
Cause Cause
Fluid supply is exhausted
Clogged suction
Open or worn piston valve
packings
Open or worn intake valve
Clogged gun, hose, outlet,
etc.
Open or worn outlet check
valve
Worn intake or piston valve or
seals
Loose suction line
Agitator/mixer is not
submerged
Agitator/mixer RPM is too high Lower the agitator/mixer RPM.
Incorrect fluid pressure at gun
Fluid is too thin or too thick
Dirty, worn, or damaged spray
gun
Over voltage (greater than
300 V)
No power to the control board
Encoder fault
Oil was over-filled
Drain plug is not tightened
properly
Seal cartridge o-ring missing
or damaged
Solution
Solution Solution
Refill the fluid supply and prime the pump.
Clean the suction tube.
Clear the piston valve. Replace the packings.
Clear or service the intake valve.
Clear the gun, hose, outlet, etc.
Clear or service the outlet check valve.
Service the pump lower (see Lower manual
311762).
Tighten suction line connections. Use
compatible liquid thread sealant or PTFE tape
on connections.
Submerge the agitator/mixer.
See the gun manual. Read the fluid
manufacturer's recommendations.
Adjust the fluid viscosity. Read the fluid
manufacturer's recommendations.
Service the spray gun (see spray gun manual).
Check the power supply.
Contact your Graco distributor or Tech Service
for more information.
Cycle power.
Recalibrate the encoder following the procedure
listed in the e-Xtreme Driver Operation/Repair
manual.
Contact your Graco distributor or Tech Service
for more information.
Drain and refill oil as stated in
Check Oil Level, page 17.
Torque to 18–23 ft-lb (25–30 N•m).
Replace the shaft bearing assembly.
Pressure Relief Procedure, page
Troubleshooting
12. Disconnect
19