Graco 3400 manual Troubleshooting, Problem Cause Solution

		Troubleshooting
	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
		necessary. Honda Engines Owner's
		Manual.
	Spark plug is disconnected of dam-	Connect spark plug cable or replace
	aged	spark plug
	Cold engine	Use choke
	Fuel shutoff lever is OFF	Move lever to ON position
	Oil is seeping into combustion	Remove spark plug. Pull starter 3 to 4
	chamber	times. Clean or replace spark plug.
		Start engine. Keep sprayer upright to
		avoid oil seepage
Engine operates, but displacement	Pump switch is OFF	Turn pump switch ON
pump does not operate
	Pressure setting too low	Turn pressure adjusting knob clock-
		wise to increase pressure.
	Fluid filter (29) is dirty	Clean filter. Page 22.
	Tip or tip filter is clogged	Clean tip or tip filter. Manual 309639.
	Displacement pump piston rod is	Repair pump. Manual 309250.
	stuck due to dried paint
	Connecting rod is worn or damaged	Replace connecting rod. Page 8.
	Drive housing is worn or damaged	Replace drive housing. Page 8.
	Electrical power is not energizing	Check wiring connections. Page 11.
	clutch field	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 +0.2Ω; if not,
		replace pinion housing.
		Have pressure control checked by authorized
		Graco dealer
	Clutch is worn, damaged, or incor-	Adjust or replace clutch. Page 9.
	rectly positioned
	Pinion assembly is worn or damaged	Repair or replace pinion assembly. Page 9.

6 310813 Rev C