Motor Test
Relieve pressure; page 3.
For checking armature, motor winding and brush electrical continuity.
Setup
1.Unplug sprayer.
2.Remove drive housing. See page 15. This ensures that any resistance noticed in armature test is due to motor and not to worn gears in drive housing.
3.Fig. 3. Remove brush inspection covers (A).
4.Fig.4. Remove screws (25, 26). Lower control board (22a). Disconnect two leads (C) from motor to board.
B
A
Fig. 3 | 02991 |
Armature Short Circuit Test
1.Remove fan cover (B). See Fig.3.
2.Spin motor fan by hand. If there are no shorts, motor coasts two or three revolutions before coming to complete stop. If motor does not spin freely, armature is shorted and motor must be replaced. See page 12.
Armature, Brushes, and Motor Wiring Open Circuit Test (Continuity)
1.Fig. 4 Connect red and black motor leads (C) together with a test lead. Turn motor fan by hand at about two revolutions per second.
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| brown |
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80 |
| 96 |
| 107 |
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| 108 | 67 |
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| D |
| 22a | |
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black |
| yellow |
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green |
| 78 |
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30 |
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| 77 |
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white |
| black | red |
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| E |
| C |
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| 232910 – 232913, 232916, 232917 | 8385A | |||
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80 |
| brown |
| 107 |
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| 119 | E |
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| 108 | 67 |
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| D |
| 22a | |
black |
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| yellow |
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white |
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| 78 |
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green |
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with yellow |
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stripe |
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| 77 |
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| black red |
| 96 |
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| 116 | C |
| blue |
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Fig. 4 | 232918, 232915, 232919, 232914 | 8386A | |||
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2.If uneven or no resistance, check for: broken brush springs, brush leads, motor leads; loose brush terminal screws or motor lead terminals; worn brushes. See page 10.
3.If still uneven or no resistance, replace motor; page 12.
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