Troubleshootingchart

WARNING

To reducethe riskofseriousbodilyinjury, includingfluid injection, splashingintheeyes or onthe skinor injury from moving parts, always follow the Pressure Relief Procedure Warnlngbefore proceeding.

Problem

Engine willnot start M IS hard to start

Engine misses or lacks power

COW pessure andlor pump runs rough

Water leakagefrom under pump manifold

Water in pump

Frequent or prematurefailure of the packings

Strong surging at the inlet and low pressure 3n the discharge side

Cause

No gasoline infuel tank or carburetor.

Low oil level.

StarVStop switchin Stop position.

Water in gasoline or old fuel.

Lwse or wrong battery connection. Battery not properly charged. Choked improperly. Flooded engine.

Dirty air cleaner filter.

Spark plug dirty, wronggap or wrong type. Spray gun closed.

Partially plugged air cleaner filter.

Spark plug dirty, wronggap or wrong type. lnconecl ignitiontiming.

Worn or wrong size tip. Inlet filter Clogged.

Worn packings, abrasivesin water or natural wear.

Inadequate water suppiy. Belt slippage.

Fouled or dirty inletor discharge valves. Even

asmaii particle cancause the valveto stick. Restricted inlet.

Worn inlet or discharge vaives. Leaking high pressure hose. Wom packings.

Humid air condensing inside crankcase. Worn packings.

Oil seals leaking.

Scored, damagedor wom plungers. Abrasive materialin the fluid beingpumped. Inlet water temperaturetoo high. Overpressurizingpump.

Excessive pressuredue to partially plugged or damaged tip.

Pump running too long without spraying.

Running pump dry.

Foreignparticles in the inlet or discharge valve or wominlet and/ordischargevalves.

Solution

Fill the tank with gasoline, openfuel shut offvalve. Check fuelline and carburetor.

Add to proper level.

Move switch to start position.

Drain fuel tankand carburetor. Use new fueland dry spark plug.

Check and tighten battery connections.

Check electrolyte levelof cells, recharge battery.

Open choke and crank engineseveral times to clear out gas.

Remove and ciean.

Clean, adjust thegap or replace. Trigger spray gun.

Remove and ciean.

Clean. adjust thegap or replace. Time engine.

Replace with tip ofproper size. Clean. Check'more frequently.

Check filter. Replace packingsSee. PUMP SERVICE.

Check water flow rateto pump.

Tighten or replace;USB wrrect belts and replace both at same time.

Clean inlet and discharge valve assemblies. Check filter.

Check gardenhose. may be collapsed or kinked. Replace wom valves.

Replace'highpressure hose.

Install new packings. See PUMP SERVICE.

3hange oil as specified in MAINTENANCE. nStali new packings. See PUMP SERVICE. nstail new oil seals. See PUMP SERVICE.

Install new plungers. See PUMP SERVICE. Install properfiltration on pumpInlet plumbing. Check watertemperature; may not exceed16OOF.

Do not modify anyfactory-set adjustments. See

EQUIPMENT MISUSE HAZARD.

Clean or replacetip. See Installingand Changing Spray Tips.

Never run pump more than 10minutes without spraying.

Do not run pump without water.

Clean or replace valvesSee. PUMP SERVICE.

308-528 9

800-666, 800-668 specifications

Graco Inc, a leading manufacturer in the fluid handling industry, is well-known for its innovative solutions that cater to a wide range of applications. Among its extensive product lineup, the Graco Inc 800-668 and 800-666 models stand out for their impressive features and cutting-edge technologies designed for efficiency, precision, and reliability.

The Graco 800-668 model is a heavy-duty diaphragm pump that excels in transferring a variety of fluids, including corrosive materials and viscous substances. This model is engineered with advanced materials that enhance its durability and resistance to wear, ensuring long-lasting performance even in the most demanding environments. Its robust construction allows for high flow rates and exceptional suction capabilities, making it ideal for industrial operations where efficiency is crucial.

In contrast, the Graco 800-666 model is a versatile piston pump that offers remarkable pressure output and flow consistency. This model is particularly suitable for applications requiring precise fluid dispensing and high-pressure spraying. The Graco 800-666 is equipped with a patented control technology that allows users to adjust the flow rate, ensuring precise delivery of materials. This feature significantly reduces waste and enhances productivity, a vital aspect in sectors such as automotive, aerospace, and construction.

Both models utilize Graco’s proprietary technology, ensuring optimal performance across a variety of applications. They are designed for easy maintenance, with accessible components that facilitate quick repairs and part replacements. This design consideration reduces downtime and ensures continuous operation, which is essential in an industrial setting.

In addition to their functional features, Graco 800-668 and 800-666 are engineered with safety in mind. They incorporate various safety mechanisms to prevent leaks and overpressurization, protecting both the operator and the environment. This commitment to safety is paired with ergonomic designs that enhance user comfort and reduce physical strain during operation.

Overall, Graco Inc 800-668 and 800-666 models exemplify the brand’s dedication to innovation and quality in the fluid handling industry. Their advanced features, reliability, and user-friendly design make them ideal choices for professionals seeking high-performance pump solutions for various applications. With Graco, users can expect not only superior technology but also a commitment to excellence and customer satisfaction that has solidified the brand's reputation worldwide.