Hitachi 232133 manual Motor Brushes, Test brushes, Electric Shock Hazard

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Motor Brushes

NOTE: Replace brushes when worn to about 12.5 mm (0.5 in.). Always check both brushes. Brush Repair Kit 236967 is available for motor brush repair.

NOTE: Replacement brushes may last only half as long as the original ones. To maximize brush life, break in new brushes by operating the sprayer with no load as instructed in this procedure.

NOTE: To minimize down time, and for best sprayer performance, check motor brushes and clean trans- ducer (see page 28) whenever pump is repacked.

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, when instructed to relieve pressure, follow the Pressure Relief Procedure on page 8.

1.Unplug sprayer.

2.Remove both inspection covers (A) and their gaskets. See Fig.14.

A

Fig. 14

7735A

 

3.Push in spring clip (F) and release hooks (G) from brush holder (B). Pull out spring clip. See Fig. 15.

4.Inspect commutator for excessive pitting, burning or gouging. A black color on commutator is normal. Have commutator resurfaced by a qualified motor repair shop if brushes seem to wear too fast or arc excessively. See Step 9.d., also.

5.Repeat for other side.

6.Place a new brush (C) in holder (B) so ramp (H) faces spring. See Fig. 15.

7.Holding spring clip (F) at a slight angle, slide spring clip into brush holder and hook it over end of holder. See Fig. 16. Pull on spring clip to be sure it stays in place. Connect brush lead to blade con- nector (E).

8.Repeat for other side.

9.Test brushes.

a. Remove pump connecting rod pin (14).

WARNING

ELECTRIC SHOCK HAZARD

Do not touch the brushes, leads, springs or brush holders while the sprayer is plugged in to reduce the risk of electric

shock and serious bodily injury.

b.With sprayer OFF, turn pressure control knob fully counterclockwise to minimum pressure. Plug in sprayer.

c.Turn sprayer ON. Slowly increase pressure until motor is at full speed.

d.Inspect brush and commutator contact area for excessive arcing. Arcs should not trail or circle around commutator surface.

10.Install brush inspection covers and gaskets.

11.Break in brushes. Operate sprayer for at least one hour with no load. Install pump connecting rod pin.

1Motor lead; do not disconnect

2Minimum 12.5 mm (.5 in.)

 

 

2

 

 

H

C

1

G

 

 

 

F

 

 

 

 

 

 

B

 

 

 

E

Fig. 15

 

 

D

 

 

1

 

 

F

G

 

 

 

 

 

 

C

 

Fig. 16

 

E

03881

 

 

 

 

 

308801

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Contents Models 232133 and 232131, Series a 308801Model 232132 and 232130, Series a Read and Keep for ReferenceSymbols Table of ContentsInjection Hazard Fire Skin Injection Explosion Hazard Fire and Explosion HazardDC a Component Function and IdentificationModel 232133 Shown SetupHow to use the pressure control How to use the gun safety latchHow to use the pressure drain valve GroundingHow to use the RAC IV tip guard Pressure Relief ProcedureHow to remove a tip clog Injection HazardStartup Fire and Explosion Hazard Adjust spray patternShutdown and Care How to flush When to flushFlushing Relieve pressureOpen or drain position Basic Problem Solving TroubleshootingElectrical Intermediate Problem Solving Replace pin if missing. Be sure retainer Unit will not run on generator but does run on AC power Tool List General Repair InformationMoving Parts Hazard Fire HazardSetup Motor TestArmature Short Circuit Test Motor Brushes Test brushesElectric Shock Hazard Displacement Pump Repairing pumpRemoving pump See Motor Remove three drive housing screwsMotor Control Board Motor control board diagnosticsMotor control board removal LED Sprayer Operation Indicates What to do BlinksOn/Off Switch Power Supply CordDrive Housing, Connecting Rod, Crankshaft Not shown Pressure Transducer InstallationPressure Transducer Seal RemovalSuction Hose Models 232132 Replacement Drain ValveRepair Technical Data DimensionsAccessories Model 232132 and 232133, Series a Complete Sprayer Parts240519 CONNECTING, rod assy 51H 235014 ASSEMBLY, drain valve239769 KIT, pump, displacement See manualModel 232130 and 232131, Series a CRANKSHAFT, U-695 239979Manual 236352 POTENTIOMETER, pressure adjAdditional Warranty Coverage Graco Standard WarrantyPhone Number Toll Free
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