MTD 463 User Manual Page 88

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TM 5-6115-465-34
NAVFAC P-8-625-34
TO 35C2-3-446-2
TM 06858B/06859D-34
Figure 3–5. Rotor Assembly Current Draw Test Circuit.
(c) Ammeter should indicate 2.8 to 3.0 amperes at
70° to 80°F (21 .1° to 26.7°C).
(d) High current reading on ammeter indicates low
resistance or a shorted rotor warning.
(e)
Using an ohmmeter, check resistance across slip
rings. Resistance should be 7.5 to 8.0 ohms at an am–
bient temperature of 70° to 80°F (21 .1° to 26.7°C).
(10)
Replace rotor assembly if inspection and test
requirements are not met.
(11) Inspect voltage regulator connector, cover
assembly, and voltage adjust for cracks, corrosion, and
evidence of shorting or other damage.
(12) Inspect fuse holder for cracks, corrosion, and
other damage. Check
fuse for burned out condition.
Check
fuse for continuity if in doubt.
(13) Inspect brush assembly for corrosion and ex-
cessive wear.
NOTE
The brushes are excessively worn if 3/16 inch or less
extends beyond the bottom of the holder.
(14) Check brush spring tension. A force of 4 to 6
ounces should move brush against spring.
(15) Using an ohmmeter, test brushholder assembly
as follows:
(a) Attach one test lead to brushholder and touch
other lead to each terminal and each brush. There should
be no indication of continuity between brushholder and
any terminal or brush.
(b) Check for continuity between each terminal and
its respective brush.
(16) Replace brushholder assembly if inspection and
test requirements are not met.
(17) Inspect pulley for excessive wear at pulley
groove, cracks, corrosion. and other damage.
US. GOVERNMENT
PRINTING OFFICE :
1995
0
-
388-421 (02499)
3-10
Change 10
PIN:
013547-010
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