Graco 309063F Spin Test, Motor Brush Replacement, Electric Shock Hazard

Page 12

Spin Test

Setup

Electric Shock Hazard; page 6.

To check armature, motor winding and brush electrical continuity:

1. Relieve pressure; page 6.

2.Remove drive housing; page 24.

3.Fig. 7. Remove pressure control cover (39). Dis- connect red and black motor leads from control board.

4.Fig. 8. Remove motor shroud (74).

Armature Short Circuit Test

Quickly turn motor fan by hand. If no electrical shorts, motor coasts two or three revolutions before complete stop. If motor does not spin freely, armature is shorted. Replace motor; page 25.

Armature, Brushes, and Motor Wiring Open Circuit Test (Continuity)

1.Connect red and black motor leads together with test lead. Turn motor fan by hand at about two revolutions per second.

2.If uneven or no resistance, check for: broken brush springs, brush leads, motor leads; loose brush terminal screws, motor lead terminals; worn brushes. Repair as needed; page 12.

3.If still uneven or no resistance, replace motor; page 25.

39

F

G

 

9578A

Fig. 7

 

 

Motor Brush Replacement

Motor Brush Removal

Replace brushes worn to less than 1/4 in. (6 mm). Check both sides. See Parts List 309064 for correct brush kit for your series of sprayer.

1.Read General Repair Information; page 7.

2. Relieve pressure; page 6.

3.Fig. 8. Remove four screws (18) and motor shroud (74).

4.Pry off two brush caps (A). Tag locations of red (+) and black (--) motor leads. Cut tie wrap.

5.Fig. 5. Remove screw (C) and discard brush (B) for motor with capacitor attached. Remove brush leads from control box for motor without capacitor attached.

(Continued on page 13)

74

18 A

Fig. 8

TI0053

 

12309063

Image 12
Contents Repair 309063FSpecifications 309063Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Component Identification and Function Pressure Relief Procedure Skin Injection HazardGeneral Repair Information Read Electric Shock Warning Burn Hazard WarningSprayer cord includes a grounding wire with an Grounding and Electric RequirementsSprayer requires Never use an outlet that is not grounded or an adapterTroubleshooting Motor WON’T OperateLOW or Fluctuating Output Placement Motor Brush Replacement Spin TestElectric Shock Hazard Read General Repair InformationInstall pump 13 Displacement Pump Re- placement, 309063 On/Off Switch Replacement InstallationRemoval Capacitor on Motor 232900, A, B232901, a 233797, aWhite ON/OFF Black Switch Green Power Cord Motor Connector 100 Vac 240 Vac TP1 TP2Pressure Control Repair LED Sprayer Operation Indicates BlinksInstall motor control board 35 with five screws Pressure Adjust Potentiometer Installation Installation See Fig Removal See FigDrive Housing Replacement DisassemblyAssembly Remove pump 13 Displacement Pump Re- placement,Motor Replacement Remove pump Displacement Pump Replace- ment,Remove drive housing Drive Housing Replace- ment, Install fluid manifold Pressure Control Replace- ment,Displacement Pump Replacement RemovalTechnical Data DimensionsGraco Information