ULTRA Plus+ 1500 Airless Paint Sprayer - Graco Inc.

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TroubleshootingTYPE OF PROBLEMMotor runs and pump strokes,but output is low or there is nooutput.WHAT TO CHECKIf check is OK, go to next checkWHAT TO DOWhen check is not OK refer to this columnCheck extension cord size and length. Replace cord with a larger size, groundingtype extension cord.Motor runs but pump does notstroke.Motor is hot and runsintermittently.Check paint supply.Check for clogged intake strainer.Check for loose suction tube or loose fittings.Check for worn spray tip.Check motor brushes; check for loose leadsand terminals, minimum 13 mm brush length,broken or misaligned springs, or brushesbinding in holders. See page 13.Check motor armature for shorts by using anarmature tester (growler).Check to see if pump continues to strokewhen gun trigger is released. With pump onand primed, trigger gun momentarily, thenrelease and engage safety latch. Relievepressure, turn off and unplug sprayer.Check to see if intake valve ball and pistonball are seating properly.Check for leaking around throat packing nutwhich may indicated worn or damagedpackings.Defective pressure control transducer.Check displacement pump connecting rodpin (20). See page 15.Check for frozen or hardened paint in thepump (39).Be sure crank in drive housing rotates; plugin sprayer and turn on briefly to check. Turnoff and unplug sprayer.Determine if sprayer was operated at highpressure with small tips, which causes lowmotor RPM and excessive heat build up.Be sure ambient temperature where sprayeris located is no more than 32C and sprayeris not located in direct sun.Determine in sprayer was turned on,pressurized, but not operating for longperiods of time.Refill and reprime pump.Remove and clean strainer and reinstall.Tighten; use thread sealant or sealing tape onthreads, if necessary.Follow Pressure Relief ProcedureWarning, then replace tip. See yourseparate gun or tip manual.Replace parts as needed. See page 13.Replace motor. See page 20.Service pump. See manual 307–806.Remove intake valve and clean. Check ballsand seats for nicks; replace if necessary.See manual 307–806. Strain paint beforeusing to remove particles that could clog thepump.Replace packings. See manual 307–806.Also check piston valve seat for hardenedpaint or nicks and replace if necessary.Tighten the packing nut/wetcup.Replace pressure control transducer. Seepage 17.Replace pin, if missing. Be sure retainerspring (35) is fully in groove all aroundconnecting rod. See page 15.Thaw. See NOTE 1. Plug in sprayer and turnon. Slowly increase pressure setting to see ifmotor starts.Check drive housing assembly for damageand replace if necessary. See page 23.Decrease pressure setting or increase tipsize.Move sprayer to shaded, cooler area, ifpossible.Turn off sprayer whenever you stop sprayingfor a while and relieve fluid pressure.NOTE 1: Thaw the sprayer if water or water–based paint has frozen in it, by placing it in a warm area. Do not try tostart the sprayer until it has thawed completely. If paint hardened (dried) in the sprayer, replace the pump packings.See manual 307–806.
-Motor Brush ReplacementELECTRIC SHOCK HAZARDTo reduce the risk of Electric Shock: wait5 minutes after turning sprayer off beforeservicing to allow stored current to discharge.WARNINGNOTE: Replace the brushes when they have worn toless than 10 mm. See Fig. 10. Always replace bothbrushes at the same time. A Brush Repair Kit, p/n222–157, and spring clip, p/n 110–816, are available.NOTE: To maximize replacement brush life, break in newbrushes by operating the sprayer with no load for at leastone hour. To operate with no load, remove the pumpconnecting rod pin.WARNINGINJECTION HAZARDTo reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure ReliefProcedure on page 7.Fig. 8A141. Remove motor cover (14) and both inspectioncovers (A). See Fig. 8.2. Push in spring clip (D) to unhook, and then pullout. See Fig. 9.3. Loosen terminal screw (F). Pull brush lead (E)away, leaving motor lead (G) in place. Removebrush (C) and spring (B). See Fig. 10.4. Inspect commutator for excessive pitting, burningor gouging. A black color on commutator is normal.Have commutator resurfaced by qualified motorrepair shop if brushes seem to wear too fast.5. Install new brush (C) so lead is in long slot (H) ofholder. See Fig. 11. Slide the terminal (E) underthe terminal screw washer. Make sure motorlead (G) is still connected the at screw. Tightenscrew (F). See Fig. 10.6. Place spring (B) on brush as shown in Fig. 11.Spring must coil as shown.7. Push in and hook spring clip (D). See Fig. 11.8. Repeat for other side.9. Test brushes. Remove connecting rod pin (20).See Fig. 13, page 15. With sprayer off, turn pressurecontrol knob fully counterclockwise to minimumpressure. Plug in sprayer. Turn sprayer on.Slowly increase pressure until motor is at fullspeed. Inspect brush and commutator contactarea for excessive arcing. Arcs should not “trail” orcircle around commutator surface.CAUTIONDo not touch the brushes, leads, springs or brushholders while the sprayer is plugged in, to reduce therisk of electric shock and serious bodily injury.10. Install brush inspection plates, gaskets, and covers.11. Break in brushes. Operate sprayer for at least onehour with no load. Then reinstall connecting rodpin (20).
Page 1: INSTRUCTIONS-PARTS LIST308-552INSTR
Page 7: OperationPressure Relief ProcedureW
Page 14 and 15: -Motor Brush ReplacementBHBCOrder p
Page 16 and 17: Pressure ControlCAUTIONDo not insta
Page 18 and 19: Pressure Control Repair2292302323a2
Page 21 and 22: Seals (93) located inside conduit (
Page 23 and 24: Drive Housing ReplacementWARNINGINJ
Page 25 and 26: Model 231-321, Series AIncludes ite
Page 27 and 28: Notes
Page 29 and 30: Part Number 239-429Pressure Control
Page 31 and 32: Technical DataPower Requirements (f

ULTRA Plus+ 1500 Airless Paint Sprayer - Graco Inc.

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