Troubleshooting
3A3394E Repair - Parts
47
Excessive paint leakage into throat
packing nut
Throat packing nut is loose.
Remove throat packing nut spacer. Tighten throat
packing nut just enough to stop leakage.
Throat packings are worn or damaged.
Replace packings. See Pump manual.
Displacement rod is worn or damaged.
Replace rod. See Pump manual.
Fluid is spitting from gun
Air in pump or hose.
Check and tighten all fluid connections. Reprime pump.
See Operation manual.
Tip is partially clogged.
Clear tip. See Gun manual.
Fluid supply is low or empty.
Refill fluid supply. Prime pump. See Operation manual.
Check fluid supply often to prevent running pump dry.
Excessive leakage around hydraulic
motor piston rod wiper
Piston rod seal worn or damaged.
Replace hydraulic motor piston rod wiper and seal.
Sprayer overheats
Paint buildup on hydraulic components.
Clean hydraulic components.
Hydraulic oil level is low.
Fill with hydraulic oil. See Operation manual.
Excessive hydraulic pump noise
Low hydraulic fluid level.
Shut off sprayer. Add fluid*.
Pulleys loose on hydraulic pumps.
Remove belt guard. Check and tighten loose pulley.
Display does not turn on
Key switch is not turned on.
Turn key switch to ON position.
Main fuse is blown.
Replace fuse. See
Cable between display and main board is
disconnected or damaged.
Reconnect or replace cable.
Display board failure.
Replace display board.
Gallon (liter) counter not
adding fluid volume
Fluid pressure not high enough.
Must be over 800 psi (55 bar) for counter to add.
Broken or disconnected pump counter wire,
both pumps.
Check wires and connections. Replace any broken
wires.
Missing or damaged magnet, both pumps.
Reposition or replace magnet on pump, see Parts man-
ual (Pump parts) for magnet location.
Bad sensor, both pumps.
Replace sensor. See
Distance not adding properly
(MEASURE mode will be inaccurate and
speed will be wrong)
Machine not calibrated.
Perform calibration procedure. See Operation manual.
Rear tire pressure is too low or too high.
Adjust tire pressure to 55 +/- 5 psi (380 +/- 34 kPa).
Gear teeth missing or damaged
(right side when standing on platform).
Replace distance gear/wheel hub. See
Distance sensor is loose or broken.
Reconnect or replace sensor. See
Mils not calculating or calculates wrong
Distance sensor.
See “Distance not adding properly”.
Gallon counter.
See “Gallon (liter) counter not adding fluid volume”.
Line width not entered.
Set line width for each gun. See Operation manual.
Bad or damaged display board.
Replace display board.
Pressure control knob does not rotate
Knob is jammed.
Pull back cover where remote cable connects to hydrau-
lic pump and turn counter-clockwise (ccw) until free.
Pressure control knob rotates freely with
no pressure change
Set screw at hydraulic pump connection is
loose.
Remove cover and adjust cable. See
Remote cable is broken or disconnected.
Replace or reconnect cable. See
Problem
Cause
Solution
