Troubleshooting - Graco LineLazer 3400 Repair Manual

Problem
Engine will not start
Engine operates, but displacement
pump does not operate
6

Troubleshooting

Cause
Engine switch is OFF
Engine is out of gasoline
Engine oil level is low
Spark plug is disconnected or dam-
aged
Cold engine
Fuel shutoff lever is OFF
Oil is seeping into combustion
chamber
Pump switch is OFF
Pressure setting too low
Fluid filter (104) is dirty
Tip or tip filter is clogged
Displacement pump piston rod is
stuck due to dried paint
Connecting rod is worn or damaged Replace connecting rod. Page 8.
Drive housing is worn or damaged
Electrical power is not energizing
clutch field
Clutch is worn, damaged, or incor-
rectly positioned
Pinion assembly is worn or damaged
Solution
Turn engine switch ON
Refill gas tank. Honda Engines
Owner's Manual.
Check oil level. Replenish oil, if neces-
sary. Honda Engines Owner's Manual.
Connect spark plug cable or replace
spark plug
Use choke
Move lever to ON position
Remove spark plug. Pull starter 3 to 4
times. Clean or replace spark plug.
Start engine. Keep sprayer upright to
avoid oil seepage
Turn pump switch ON
Turn pressure adjusting knob clock-
wise to increase pressure.
Clean filter. Page 22.
Clean tip or tip filter. Manual 309741.
Repair pump. Manual 309250.
Replace drive housing. Page 8.
Check wiring connections. Page 11, 12.
Reference pressure control repair. Page 13.
Reference wiring diagram. Page 23.
With pump switch ON and pressure turned to
MAXIMUM, 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; if not,
replace pinion housing.
Have pressure control checked by authorized
Graco dealer
Adjust or replace clutch. Page 9.
Repair or replace pinion assembly. Page 9.
Troubleshooting
311019L