TM 5-3810-231-12
Figure 86. Gantry spreader assembly and gantry sheaves.
Section XXII. CRANE ELECTRICAL CONTROL SYSTEM
c.
Installation.
147.
General
(1) Install alternator assembly as
The crane electrical control system consists of a
instructed on figure 87.
controller, control cabinet, alternator and the magnetic
(2) Adjust V-belt drive tension (para
clutches (par. 116).
These components function
together to permit the operator to swing the machine to
d.
Test.
left or right.
(1) Disconnect leads at the alternator
148.
Crane Alternator
field terminals and attach ohmmeter.
Reading should be approximately 23 to 25
a.
Removal.
Remove the alternator as
ohms.
instructed on figure 87.
(2) If reading is not up to required
b.
Cleaning and Inspection.
valve check alternator brushes for general
condition and proper contact. If trouble
(1) Clean the exterior with a cloth
persists replace the alternator.
dampened with an approved cleaning solvent
e.
Brush Replacement.
Replace alternator
and dry thoroughly.
brushes in same manner as engine alternator brushes
(2) Inspect for cracks, breaks and
other damage.
(3) Replace a defective or damaged
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