Sea Frost DC 5000 User Manual
Page 40
40
Tip: In a new motor with new brushes the back of the brush will be flush with the brush
housing, as the brush wears the distance into the housing will increase. (See top view
drawing below.) A quick measurement of the depth will be sufficient. When the brush is
5/8” into the holder it will need replacement. If in doubt change the brushes. Carry
spares.
When changing brushes, be sure the phillips screw holding the brush wire and power
lead is tightened properly to assure a good electrical connection.
Commutator wear can be measured by installing new brushes and measuring the depth
in the housing. A properly maintained motor will show little wear here (brush end flush
with the housing). A worn commutator may need to be resurfaced to prevent excessive
and rapid wear of replacement brushes.
March Water Pump
The water pump motor brushes are 7/16” when new. Replace them before the spring
becomes close enough to damage the commutator.