Troubleshooting Chart

WARNING

To reduce the riskof serious bodily injury, including fluid injection, splashing in the eyes oron the skin, or injUryfrOmmOVingparts, alwaysfollowthe Pressure Relief Procedurewarning onpage7beforeproceeding.

PROBLEM	CAUSE
Low Pressure	Worn nozzle.
. :	Coupling slippage.
	Air leak in inlet plumbing.
, .	Inlet filterclogged.
	Inlet filterclogged.
	Worn packing. Abrasivesin
	pumped fluid or severe cavita-
	tion. Inadequate water supply.
	Fouled ordirty inlet or dis-
	charge valves.
	Worn inletor discharge valves.
	Leaky discharge hose.
	Pressure adjustmentset down.
Pump runs extremely	Restricted inlet or air
rough, pressure low.	entering the inlet plumbing.
	Inlet restrictions and/or air
	leaks. Stuck inlet or discharge
	valve.
	Leaking high pressure seals.
	Inadequate water supply.
Water leakagefrom under	Worn packings.
the manifold.
Water in pump crankcase.	Worn packings.
	Oil seal leaking.
	May be caused byhumid air
	condensing into water inside
	the crankcase.
Frequent or premature	Scored, damaged, orworn
failure of the packing.	plungers.
	Abrasive material in the water
	being pumped.
	Inlet water temperature too
	nigh.
	Over pressurizingpump.

lighten or replace.

Disassemble. reseal, replace bad parts, and reassemble.

Clean. Use adequate size. Check more frequently.

Install proper filter. Check flow available to pump. Replace packings.

Clean inlet and discharge valve assemblies.

Replaceworn valves and/or discharge hose.

Turn adjustment knobin to increase pressure.

Proper sizeinlet plumbing; check for air tight seal.

Cleanout foreign material, replace worn valves.

Replace seals

Check flow available to pump.

Replace packings.

Replace packings. Replace oil seals.

Change oil at 3 month or 500 hour intervals.

Replace plungers.

Install proper inlet filter.

Check inlet water temperature; be sure not toexceed 160°F.

Do not modify any factory-set adjustments.

Strong surging atthe inlet and low pressure on the discharge side.

Unit will not. .start. . .. .

Chemical injection system doesn't work.

3cessive pressure dueto ~artiallyplugged or damagedtip lump running toolong Nithout spraying or cleaning. qunning pump dr$

Foreignparticles in the inletor jischarge valve, orworn inlet tnd/or discharoe valves

Jnit notplugged in. 2.F.I.C. activated.'

ilenric motor overheated

ilectric sewiceoff. :hemica1 injector clogged.

Wjunable nozzle completely :losed.

.ow chemical level.

Clean or replacetip.

Never run pump morethan 10 minutes without spraying or cleaning. Do not run pump without water.

Replace or clean valves.

Check power cord.

Check for proper grounding. Push SwitchON (RESETIbutton.

St motor cool and push reset button ,n motor.

:heck fusehircuit breaker panel.

Jisassemble chemical valve and clean. ;heck and clean chemical hose and filter. [urn control ringon nozzle clockwise

o cause dropin pressure. :heck level of chemical.

8'	802-776
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800-232, 802-776 specifications

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The Graco 802-776 is particularly recognized for its robust design and outstanding performance in high-pressure environments. This model is typically utilized in applications such as air-powered spray guns and paint distribution systems, making it ideal for professionals in the automotive, manufacturing, and construction industries. One of the main features of the 802-776 is its high flow rate, allowing users to complete tasks more efficiently. Additionally, the unit is equipped with a heavy-duty construction that minimizes wear and tear, thus extending its operational lifespan.

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In summary, Graco Inc. models 802-776 and 800-232 are exemplary products that showcase the company's commitment to delivering high-quality fluid handling solutions. With their unique features, advanced technologies, and user-centric designs, these units are well-suited for a broad range of applications, addressing the demands of modern industries effectively.