Hitachi 309067 dimensions Motor Brushes, Test brushes

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Motor Brushes

NOTE: Replace brushes worn to less than13 mm

(0.5 in.). Check both brushes. Use Brush Repair Kit 236967 (243268 for sprayers 232914 and 232915) for motor brush repair.

Relieve pressure; page 3.

1.Unplug sprayer.

2.Remove both inspection covers (A) and their gaskets. See Fig.5.

A

Fig. 5

9662A

 

3.Push in spring clip (F) and release hooks (G) from brush holder (B). Pull out spring clip. See Fig. 6.

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. 6.

7.Holding spring clip (F) at a slight angle, slide spring clip into brush holder and hook it over end of holder. See Fig. 7. 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 must not trail or circle around commutator surface.

10.Install brush inspection covers and gaskets.

11.Install pump connecting rod pin (14).

1Motor lead; do not disconnect

2Minimum 13 mm (.5 in.)

 

2

 

 

H C

1

G

 

F

 

 

 

 

B

 

 

E

Fig. 6

D

03881

 

 

 

1

 

F

G

 

 

 

 

C

Fig. 7

E

03881

 

 

10 309067

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Contents ULTRAr MAX 309067Airless Paint Sprayer Component Function and Identification 232665, 232918, 232916, 232919Electric Shock Hazard Pressure Relief ProcedureGeneral Repair Information Explosion HazardTroubleshooting GroundingElectrical Intermediate Problem Solving Intermediate Problem Solving Move sprayer to shaded, cooler area if Armature Short Circuit Test SetupMotor Test 232910 232913, 232916Motor Brushes Test brushesRemoving pump See Displacement PumpRepairing pump 232912 232913 232915 232917Motor Motor control board removal Motor control board diagnosticsPressure Control Repair LED Sprayer Operation Indicates What to do BlinksPressure Adjusting Potentiometer Power CordOn/Off Switch 232916, 232917Drive Housing, Connecting Rod, Crankshaft Pressure Transducer Seal InstallationPressure Transducer Removal9666A Drain Valve ReplacementRepair Dimensions Technical DataAccessories 232915, B 232917, B Complete Sprayer Parts232914, 232915, 232918, 232919 YExtra Warning Labels available free 232914, a 232916, a 232918, a 232919, a 101 232665, a 232918, a 232916, a 232919, a 232914, A, 232665, a 218359 232914Model 232912 and 232913, Series B 243189 KIT, pump, displacement 51H 235014 ASSEMBLY, drain valve240519 CONNECTING, rod assy Includes 55Model 232910 and 232911, Series a CRANKSHAFT, U-695 239979236352 POTENTIOMETER, pressure adj Phone Number Graco Standard WarrantyAdditional Warranty Coverage Toll Free