Graco 16W867, ti23055a, 16W884, 16W881, 16W887, 16W984, 16W873, 16W871, 16W882, 16W987 Troubleshooting

		Troubleshooting
Problem	Cause	Solution
Pump output is low	Strainer is clogged.	Clean strainer.
	Piston ball is not seating.	Service piston ball (see pump manual).
	Piston packings are worn or damaged.	Replace packings (see pump manual).
	O-ring in pump is worn or damaged.	Replace o-ring (see pump manual).
	Intake valve ball is not seating properly.	Clean intake valve (see pump manual).
	Intake valve ball is packed with mate-	Clean intake valve (see pump manual).
	rial.
	Engine speed is too low.	Increase throttle setting (see operation man-
		ual).
	Clutch is worn or damaged.	Adjust or replace clutch. Page 32.
	Pressure setting is too low.	Increase pressure (see operation manual).
	Fluid filter, tip filter or tip is clogged or	Clean filter (see gun manual).
	dirty.
	Large pressure drop in hose with heavy	Use larger diameter hose and/or reduce overall
	materials.	length of hose. Use of more than 100 ft of 1/4
		in. hose significantly reduces performance of
		sprayer. Use 3/8 in. hose for optimum perfor-
		mance (50 ft minimum).
Excessive paint leakage into throat	Throat packing nut is loose.	Remove throat packing nut spacer. Tighten
packing nut		throat packing nut just enough to stop leakage.
	Throat packings are worn or damaged.	Replace packings (see pump manual).
	Displacement rod is worn or damaged.	Replace rod (see pump manual).
Fluid is spitting from gun	Air in pump or hose.	Check and tighten all fluid connections. Rep-
		rime pump (see operation manual).
	Tip is partially clogged.	Clear tip (see gun manual).
	Fluid supply is low or empty.	Refill fluid supply. Prime pump (see operation
		manual). Check fluid supply often to prevent
		running pump dry.
Pump is difficult to prime	Air in pump or hose.	Check and tighten all fluid connections.
		Reduce engine speed and cycle pump as
		slowly as possible during priming.
	Intake valve is leaking.	Clean intake valve. Be sure ball seat is not
		nicked or worn and that ball seats well. Reas-
		semble valve.
	Pump packings are worn.	Replace pump packings (see pump manual).
	Paint is too thick.	Thin the paint according to the supplier's rec-
		ommendations.
	Engine speed is too high.	Decrease throttle setting before priming pump
		(see operation manual).
Clutch squeaks each time clutch	Clutch surfaces are not matched to	Clutch surfaces need to wear into each other.
engages	each other when new and may cause	Noise will dissipate after a day of run time.
	noise.
High engine speed at no load	Misadjusted throttle setting.	Reset throttle to 3300 engine rpm at no load.
	Worn engine governor.	Replace or service engine governor.
Gallon counter not working	Bad sensor, broken or disconnected	Check connections. Replace sensor or wire.
	wire. Displaced or missing magnet.	Reposition or replace magnet.
No display, sprayer operates	Display damaged or has bad connec-	Check connections. Replace display.
	tion.

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