Graco RentalPro 360G 255667, Repair Manual

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Troubleshooting
6 312520A
Troubleshooting
Problem Cause Solution
Engine will not start Engine switch is OFF Turn engine switch ON
Engine is out of gasoline Refill gas tank. Honda Engines Owner's
Manual.
Engine oil level is low Try to start engine. Replenish oil, if neces-
sary. Honda Engines Owner's Manual.
Spark plug is disconnected or dam-
aged Connect spark plug cable or replace spark
plug
Cold engine Use choke
Fuel shutoff lever is OFF Move lever to ON position
Oil is seeping into combustion cham-
ber Remove spark plug. Pull starter 3 to 4
times. Clean or replace spark plug. Start
engine. Keep sprayer upright to avoid oil
seepage
False tripping of WatchDog sys-
tem. Pump does not run. Operating conditions out of Watch-
Dog parameters
Pump output is low, page 7. Turn pressure down. Contact Graco Techni-
cal Assistance to adjust WatchDog parame-
ters. Operate without WatchDog active;
Manual 310892.
Engine operates, but displacement
pump does not operate Error code displayed Reference Pressure Control repair, page 13
in manual 312521.
Pump switch is OFF Turn pump switch ON
Pressure setting too low Turn pressure adjusting knob clockwise to
increase pressure.
Fluid filter (56) is dirty Clean filter. Page 22 in manual 312521.
Tip or tip filter is clogged Clean tip or tip filter. Manual 311861.
Displacement pump piston rod is
stuck due to dried paint Repair pump. Manual 310894.
Connecting rod is worn or damaged Replace connecting rod. Page 8 in manual
312521.
Drive housing is worn or damaged Replace drive housing. Page 9 in manual
312521.
Electrical power is not energizing
clutch field Check wiring connections. Page 12 in manual
312521.
Reference wiring diagram. Page 23 in manual
312521.
With pump switch ON and pressure turned to MAX-
IMUM, use a test light to check for power between
clutch test points on control board.
Remove clutch wires from control board
and measure resistance across clutch coil.
At 70° F, the resistance must be between
1.2 +0.2
Ω
; if not, replace pinion housing.
Have pressure control checked by autho-
rized Graco dealer
Clutch is worn, damaged, or incor-
rectly positioned Adjust or replace clutch. Page 10 in manual
312521.
Pinion assembly is worn or damaged Repair or replace pinion assembly. Page10 in
manual 312521.