OILDYNE TRIM PUMP
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 5A-43
Test for Shorts
1. Check the armature on a growler (follow the growler manufacturers instructions). Re-
place the armature if it has a short.
Cleaning Commutator
1. Clean the commutator with “00” garnet grit sandpaper. DO NOT use emery paper.
2. Check the gaps between the commutator bars for material. Remove material if present.
22647
b
a
a-Commutator
b-Gap
Field Tests
Test for Open Circuit
1. Connect the ohmmeter between the field brush lead and the BLUE/WHITE lead.
22644
a
b
a-Ohmmeter Lead - Connected to Brush Lead
b-Ohmmeter Lead - Connected to BLUE/WHITE Lead
2. Zero ohms indicated (full continuity) - Field OK.
Zero ohms not indicated (no continuity) - Replace field assembly.
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