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

Page 23

 

 

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.

 

332919C

23

Image 23
Contents Operation Table of Contents Fire and Explosion Hazard Equipment Misuse Hazard Standard Models 3400, 3900, 5900, 5900HD, 7900, 7900HD Component IdentificationProContractor Models 3900, 5900, 7900, 5900HD, 7900HD Ironman Models 5900, 7900, 7900HD Lo-Boy Models 3900, 5900 Convertible Models Pressure Relief Procedure Grounding Setup Change Engine to Motor Convertible Models OnlyStartup Spray Switch Tip Guard AssemblyProContractor and Ironman units only Clearing Tip ClogsWatchDog Protection System ProContractor units only Hose ReelJob Gallons Digital Tracking SystemProContractor and Ironman units Operation Main Menu Change Display UnitsPress and hold DTS button to clear error code to zero Cleanup Turn prime valve down Drain position Pressure Relief Procedure MaintenanceProblem Cause Solution TroubleshootingTroubleshooting Fluid Pump Runs Constantly Troubleshooting ProcedureControl Board Malfunction Volts Control Board Malfunction StepsConvertible Electric Motor Will Not Run Convertible Electric Motor Will Not Run Steps See step Is there over 10-20 AC volts? Beep Two blinks is the same as E=02 Digital Display MessagesPinion Assembly/Clutch Armature Removal Pinion Assembly/Clutch Armature/ClampInstallation Metric Technical DataModels Models Honda GX160 Engine Ansi Power Rating @ 3600 rpm Horsepower Honda GX200 Engine Ansi Power Rating @ 3600 rpm Horsepower Graco Information Graco Standard Warranty