TM 5-3610-286-20
(5) Check wear of commutator carbon brushes. If upper edge of carbon brush is more than
0.20 in. (5.00 mm) below upper edge of brush holder, replace (see para. 2-80, d.).
(6) Inspect slip ring brushes for movement in holder and for wear. Replace carbon brushes
when running edge is 0.08 in. to 0.12 in. (2.00 mm to 3.00 mm) from lower edge of
holder (see para. 2-80, d.).
(7) Replace three motor cover panels and twelve hex-head screws.
b. Test.
(1) Operate motor, paying attention to any audible or visual indications of a malfunction that
may be detected.
(2) Operate motor throughout entire speed range.
(3) Test operation of main motor brake release.
c. Service.
WARNING
COMPRESSED AIR. Compressed air used for blowing away chips, dirt, etc.,
must leave nozzle at less than 30 psi (207 kPa) to prevent personal injury. Be
certain that nozzle is rated to provide a maximum of 30 psi (207 kPa). Be sure
to wear safety goggles or lenses when using compressed air. Compressed air
and particles moved by compressed air can cause damage to your eyes.
(1) Using compressed air, clean collector-side brush holders, tooth racks, and rack and
brush segment rings.
(2) Collector surface must be free of grease or paste. Clean collector surface if required.
(3) Lubricate bearings (LO 5-3610-286-12).
2-445
