Troubleshooting

		Troubleshooting
	Troubleshooting

PROBLEM	CAUSE	SOLUTION


Gas engine pulls hard (won't start)	Hydraulic pressure is too high	Turn hydraulic pressure knob counter
		clockwise to lowest setting

Gas engine does not start	Switch OFF, low oil, no gasoline	Consult engine manual, supplied

Gas engine doesn't work properly	Faulty engine	Consult engine manual, supplied

	Elevation	Refer to Engine Repair Kit.
		4.0 hp - 288678 / 5.5 hp - 248943 /
		6/5 hp - 248944 / 9.0 hp - 248945

Gas engine operates, but displacement pump	Hydraulic pump valve is OFF	Set hydraulic pump valve ON
doesn't operate
doesn't operate	Pressure setting too low	Increase pressure, page 21
	Pressure setting too low	Increase pressure, page 21

	Displacement pump outlet filter (if used) is dirty	Clean the filter
	or clogged

	Tip or tip filter (if used) is clogged	Remove tip and/or filter and clean

	Hydraulic fluid too low	Shut off sprayer. Add fluid*. See page 17

	Belt worn or broken or off	Replace. See manual 311797

	Hydraulic pump worn or damaged	Bring sprayer to Graco distributor for repair

	Dried paint seized paint pump rod	Service pump. See manual 311845

	Hydraulic motor not shifting	Set pump valve OFF. Turn pressure down. Turn
		engine OFF. Pry rod up or down until hydraulic
		motor shifts. Manual 311797

Displacement pump operates, but output is low	Piston ball check not seating properly	Service piston ball check. See manual 311845
on upstroke
on upstroke	Piston packings worn or damaged	Replace packings. See manual 311845
	Piston packings worn or damaged	Replace packings. See manual 311845

Displacement pump operates but output is low	Piston packings worn or damaged	Tighten packing nut or replace packings.
on downstroke and/or on both strokes		See manual 311845

	Intake valve ball check not seating properly	Service intake valve ball check.
		See manual 311845
	Suction tube air leak	See manual 311845
	Suction tube air leak

Paint leaks and runs over side of wetcup	Loosen wet-cup	Tighten wet-cup enough to stop leakage

	Throat packings worn or damaged	Replace packings. See manual 311845

Excessive leakage around hydraulic motor	Piston rod seal worn or damaged	Replace these parts. See manual 311797
piston rod wiper

Fluid delivery is low	Pressure setting too low	Increase pressure, page 21

	Displacement pump outlet filter (if used) is dirty	Clean filter
	or clogged

	Intake line to pump inlet is not tight	Tighten

	Hydraulic motor is worn or damaged	Bring sprayer to Graco distributor for repair

	Large pressure drop in fluid hose	Use larger diameter or shorter hose

The sprayer overheats	Paint builup on hydraulic components	Clean

	Oil level is low	Fill with oil. See page 17

Spitting from gun	Air in fluid pump or hose	Check for loose connections on siphon
		assembly, tighten, then reprime pump

	Loose intake suction	Tighten

	Fluid supply is low or empty	Refill supply container

Excessive hydraulic pump noise	Low hydraulic fluid level	Turn sprayer OFF. Add fluid*. See page 17

Electric motor does not operate	Power switch is not ON	Turn power switch to ON

	Tripped circuit breaker	Check circuit breaker at power source.
		Reset motor switch

*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid, page 17.

311796B

311796B specifications

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In summary, Graco Inc. 311796B represents a blend of durability, advanced technology, and versatility. With its robust construction, efficient air valve design, adjustable flow rates, and chemical compatibility, it serves as a reliable solution for fluid management needs across diverse industries. Whether for professionals in manufacturing, automotive, or construction, the Graco 311796B is a top choice that promises reliability and performance. As industries continue to evolve, products like the Graco 311796B will remain integral to enhancing productivity and ensuring seamless operations.

PROBLEM

CAUSE

SOLUTION

311796B specifications