Graco Inc 800-670, 308-523, 800-672, 800-674 manual Troubleshooting Chart, Problem, Cause, Solution

TROUBLESHOOTING CHART

WARNING

To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin or injury from moving parts, always follow the Pressure Relief Procedure Warning before proceeding.

PROBLEM	CAUSE	SOLUTION
Engine will not start or	No gasoline in fuel tank or carburetor.	Fill the tank with gasoline, open fuel shut off valve.
is hard to start		Check fuel line and carburetor.
	Low oil	Add to proper level.
	Start/Stop switch in Stop position.	Move switch to start position.
	Water in gasoline or old fuel.	Drain fuel tank and carburetor. Use new fuel and dry
		spark plug.
	Choked improperly. Flooded engine.	Open choke and crank engine several times to clear
		out gas.
	Dirty air cleaner filter.	Remove and clean.
	Spark plug dirty, wrong gap or wrong type.	Clean, adjust the gap or replace.
	Spray gun closed.	Trigger spray gun.
Engine misses or	Partially plugged air cleaner filter.	Remove and clean.
lacks power	Spark plug dirty, wrong gap or wrong type.	Clean, adjust the gap or replace.
Low pressure and/or	Worn or wrong size tip.	Replace with tip of proper size.
pump runs rough	Inlet filter clogged.	Clean. Check more frequently.
	Worn packings, abrasives in water or	Check filter. Replace packings. See PUMP SERVICE.
	natural wear.
	Inadequate water supply.	Check water flow rate to pump.
	Fouled or dirty inlet or discharge valves.	Clean inlet and discharge valve assemblies. Check
	Even a small particle can cause the valve	filter.
	to stick.
	Restricted inlet.	Check garden hose, may be collapsed or kinked.
	Worn inlet or discharge valves.	Replace worn valves.
	Leaking high pressure hose.	Replace high pressure hose.
Water leakage from	Worn packings.	Install new packings. See PUMP SERVICE.
under pump manifold
Water in pump	Humid air condensing inside crankcase.	Change oil as specified in MAINTENANCE.
	Worn packings.	Install new packings. See PUMP SERVICE.
	Oil seals leaking.	Install new oil seals. See PUMP SERVICE.
Frequent or premature	Scored, damaged or worn plungers.	Install new plungers. See PUMP SERVICE.
failure of the packings	Abrasive material in the fluid being pumped.	Install proper filtration on pump inlet plumbing.
	Inlet water temperature too high.	Check water temperature; may not exceed 160_F.
	Overpressurizing pump.	Do not modify any factory±set adjustments. See
		EQUIPMENT MISUSE HAZARD.
	Excessive pressure due to partially plugged	Clean or replace tip. See Installing and Changing
	or damaged tip.	Spray Tips.
	Pump running too long without spraying.	Never run pump more than 10 minutes without
		spraying.
	Running pump dry.	Do not run pump without water.
Strong surging at the	Foreign particles in the inlet or discharge	Clean or replace valves. See PUMP SERVICE.
inlet and low pressure	valve or worn inlet and/or discharge valves.
on the discharge side
Oil leakage between	Worn gasket.	Replace the gasket. See SERVICE SECTION.
the gear reducer cover
and case
Oil leakage between	Worn oil seals and/or o-ring.	Replace oil seals and/or o-ring. See SERVICE
the gear reducer cover		SECTION.
and the pump
Oil leakage between	Worn oil seal.	Replace oil seal. See SERVICE SECTION.
the gear reducer case
and the engine

￿￿￿￿￿￿￿ 9