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TROUBLESHOOTING GUIDE

PROBLEM

CAUSE

SOLUTION

Electric motor won’t run or stops

while spraying

Sprayer unplugged or fuse blown

Check fuse, replace.

Defective switch or electric motor

Replace switch or motor.

Overheating switch has opened

Unplug sprayer

1

.

Electric motor runs but pump

won’t work

Hydraulic motor stalled

See Step 5 in 

MAINTENANCE, page 13.

Pressure setting too low

Increase pressure setting.

Outlet filter is dirty or plugged

Clean filter. See manual 307–273.

Tip is plugged

Use Reverse-A-Clean feature to clear clog,

or relieve pressure and remove to clean.

Hydraulic fluid level is low

Check hydraulic fluid level, and add fluid

2

.

Hydraulic pump is worn or damaged

Check pump, replace if needed.

Hydraulic motor is worn or damaged

Check motor – see manual 306–980;

replace if needed.

Displacement rod is stuck due to dried fluid

Repair pump. See page 16.

Pump runs but output is low

Piston ball not seating

Service. See page 16.

Piston packings worn or damaged

Replace. See page 16.

Intake valve ball not seating

Service. See page 16.

Excessive leaking around

hydraulic motor piston rod wiper

Worn or damaged piston rod or seal

Replace. See manual 306–980.

Fluid leaks into wet-cup

Throat packings worn or damaged

Replace. See page 16.

Excessive surge at spray gun

Outlet filter is dirty or plugged

Clean. See manual 307–273.

Tip is plugged

Use Reverse-A-Clean feature to clear, or

relieve pressure and remove tip to clean.

Spray tip is too big or worn

Change tip.

Insufficient fluid atomization

Pressure setting is too low

Increase.

Outlet filter is dirty or plugged

Clean. See manual 307–273.

Hydraulic fluid level is low

Check, add fluid

2

.

Hydraulic pump is worn or damaged

Check, replace. See page 19.

Hydraulic motor is worn or damaged

Check motor – see manual 306–980; 

replace if needed.

Fluid coating is too thick

Spray tip is too big or it is worn

Change tip.

Tails or fingers in spray pattern

Pressure drop in hose

Use larger hose.

Fluid supply is low or exhausted

Check, refill.

Spitting from spray gun

Fluid supply is low or exhausted

Check, refill.

Static sparking from spray gun

Sprayer or work piece is not grounded

Stop spraying immediately. Check for proper

grounding as described on page 3.

Gun will not spray

Drain valve is open

Close.

Hose or tip is clogged

Relieve pressure, then clear the clog.

1

The electric motor has an overheating protection switch

which will automatically reset upon cooling. If it opens, un-

plug the sprayer and let it cool for up to 20 minutes. Try to

correct the cause of overheating.

2

When adding hydraulic fluid to the sump,

use only Graco approved fluid. See ACCESSORIES on

page 25.

Summary of Contents for Hydra-Spray EH 433 GT 226-432 L Series

Page 1: ...especially hose leaks Keep body clear of the nozzle Never stop leaks with any part of the body Drain all pressure before removing parts Avoid accidental trig gering of gun by always setting safety la...

Page 2: ...the risk of fluid injection when the tip is not installed Check diffuser operation regularly Follow the Pressure Relief Procedure below then remove the spray tip Aim the gun into a metal pail holding...

Page 3: ...ratures above 180 F 82 C or below 40 F 40 C Hose Grounding Continuity Proper hose grounding continuity is essential to maintaining a grounded spray system Check the electrical resistance of your fluid...

Page 4: ...er Le diffuseur du pistolet sert diviser le jet et r duire les risques d injection accidentelle quand l ajutage n est pas en place V rifi er le fonctionnement du diffuseur r guli rement Pour cette v r...

Page 5: ...steme Lisez aussi LES RISQUES D IN CENDIE OU D EXPLOSI N ci dessus RISQUES D INCENDIE OU D EXPLOSI N De l lectricit statique est produite par le passage du fluide grande vitesse dans la pompe et dans...

Page 6: ...a Difusor El difusor de la pistola dispersa el chorro pulverizado y reduce el riesgo de inyecci n cuando no est instalada la boquilla Revisar con regularidad el funci namiento del difusor Seguir el pr...

Page 7: ...xcede los l mites recomendados reemplazarla de inmediato Es muy arriesgado tener una manguera sin puest a tierra o con la puest a tierra en malas condici nes Leer tambi n la informaci n sobre RIESGO D...

Page 8: ...If the fluid level is at or below the ADD mark replace the strainer dipstick in the sump hole Add approved hydraulic fluid see ACCESSORIES through the hole to bring the level to the FULL mark One and...

Page 9: ...amps use it only on a separate circuit with no other loads NOTE A licensed electrician can rewire Models 226 433 and 231 004 for 230 volt service if necessary See the wiring diagram in Fig 2 Model 226...

Page 10: ...ent into a grounded metal pail Put the suction tube in the pail 5 Remove the spray tip from the gun if it is installed 6 Turn the pressure adjusting knob all the way counter clockwise to lower the pre...

Page 11: ...ngage the gun safety latch CAUTION Do not run the sprayer dry for more than 30 sec onds to avoid damaging the pump packings 7 To prime the pump hold a metal part of the gun firmly against a grounded m...

Page 12: ...AC IV handle 180 See Fig 6 2 Disengage the gun safety latch and trigger the gun into a pail Engage the gun safety latch again 3 Return the handle to the original position disengage the gun safety latc...

Page 13: ...he ADD and FULL marks on the dipstick See page 9 8 Change the hydraulic fluid every 2000 hours of op eration or 12 months whichever comes first Also clean the hydraulic pump intake filter and replace...

Page 14: ...r damaged Replace See page 16 Excessive surge at spray gun Outlet filter is dirty or plugged Clean See manual 307 273 Tip is plugged Use Reverse A Clean feature to clear or relieve pressure and remove...

Page 15: ...ee tie rod nuts 13 and pull the dis placement pump 84 down off the rods This will also pull the hydraulic motor piston down 3 Remove the cotter pin 15 from the hydraulic motor piston rod See Fig 9 4 R...

Page 16: ...t them Replace worn or damaged parts paying par ticular attention to the carbide seat on the pis ton stud 8 Inspect the outer surface of the displacement rod 103 and the inner surface of the sleeve 90...

Page 17: ...ent rod 103 and the inside of the sleeve 90 Slide the displacement rod into the pump housing 101 from the bottom until it protrudes through the packing nut 102 T ighten the packing nut just enough to...

Page 18: ...e unit and pour out the hydraulic fluid 5 Carefully lower the unit and tilt it back until the arms of the support mounting 44 are resting on the floor 6 Put the cart handle 75 through the arms Hold th...

Page 19: ...eals See Fig 14 15 and page 20 3 Remove the adjusting sprocket retaining nut 29 and pull the sprocket of f the adjusting nut See Fig 14 4 Apply light grease to the o rings Place the o rings on the pum...

Page 20: ...45 20 49 24 66 54 4 36 74 39 70 12 39 135 43 21 55 6 47 46 58 50 28 51 22 25 75 48 58 2 3 44 16 27 10 14 61 14 53 5 7 5 1 52 57 29 19 131 84 143 142 144 72 148 141 147 LABEL LABEL Ref 56 Ref 41 Ref 10...

Page 21: ...3 1 12 101 545 PIN cotter 2 13 101 566 LOCKNUT hex nylon insert 3 8 16 3 14 101 831 PIN spring 2 15 101 946 PIN cotter 1 16 102 039 PIN spring 2 17 102 063 LOCKWASHER ext tooth no 8 4 18 102 276 TERMI...

Page 22: ...E suction 1 82 208 914 GUARD fan top 1 83 208 915 GUARD fan bottom 1 84 DISPLACEMENT PUMP See parts on page 21 1 208 916 For Models 231 004 226 433 only 1 221 072 For Model 226 432 only 1 104 208 918...

Page 23: ...Sprayer 226 432 REF NO PART NO DESCRIPTION QTY 85 100 065 BALL chrome alloy 5 16 dia 1 86 100 084 BALL chrome alloy 1 2 dia 1 88 164 477 V PACKING leather 4 89 164 480 GASKET 1 90 178 902 SLEEVE housi...

Page 24: ...ecomes clogged Ball valve no 214 711 is recommended for both pur poses We also recommend using elbow no 100 840 to direct the outlet flow from the drain valve in a safe direction to a pail In the drai...

Page 25: ...ee 1 800 328 0211 207 428 HYDRAULIC FLUID Graco approved 1 gallon 3 8 liter GRACO THROAT SEAL LIQUID TSL Non evaporating fluid for the wet cup 206 995 1 quart 0 95 liter 206 996 1 gallon 3 8 liter 102...

Page 26: ...NOTES...

Page 27: ...NOTES...

Page 28: ...wear caused by the incompatibility with Graco equipment of structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance...

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