EASTMAN BBS32, Инструкция и перечень запасных частей

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11
Form C-1206
INSTALLATION OF FAN, FRONT BEARING
AND WORM GEAR
Apply adhesive (Loctite 242 recommended) to inside di-
ameter of fan, (10C1-45) bearing (90C6-48) and worm
(87C7-44). Use steel tube with 1/4” I.D. to press fan, bear-
ing and worm onto armature shaft. Make sure parts are
returned to original position as recorded in FAN AND BEAR-
ING REMOVAL, above.
Pin in worm must be aligned with slot in armature shaft for
proper assembly.
REAR BEARING REMOVAL
Position armature in collar jig as shown. Use steel rod to
press armature shaft through bore of bearing. Do not allow
armature to fall from jig.
INSTALLATION OF REAR BEARING
Lubricate armature shaft. Use 1/4” I.D. steel tube to press
rear bearing down to shoulder on armature shaft.
Support armature at front end and protect shaft from bend-
ing during reassembly.
ELECTRICAL TESTS OF ARMATURE
Repeated blown fuses or burned resistor may indicate failed
armature.
Use multimeter to check adjacent bar to bar resistance of
commutator as shown. Check each bar around entire com-
mutator.
VOLTAGE RESISTANCE
230v 20 ohms
115v 10 ohms
IF READINGS ARE 10% ABOVE OR BELOW STANDARDS,
REPLACE ARMATURE.
ELECTRICAL TESTS OF RECTIFIER
Set multimeter to 1,000 ohm scale. Measure resistance be-
tween negative and adjacent lead as shown. Reading should
be 5-50 ohms. Reverse multimeter probes. Reading should
be 1,000,000 (1 million) ohms minimum.
Repeat above procedure on remaining leads as shown.
Readings should be identical to above.
Any readings other than above indicate failed rectifier and
circuit board must be replaced.