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FORK AUTOLEVELER CIRCUIT BOARD TEST/REPLACEMENT
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TM-10-3930-673-20-2 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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Removal - TM-10-3930-673-20-20209
TM 10-3930-673-20-2
8-19. FORK AUTOLEVELER CIRCUIT BOARD TEST/REPLACEMENT (CONT)
NOTE
4
There are two LED indicators on
VS GND
autoleveler circuit board. One is labeled
"Hi A" and the other is labeled "Hi B".
(d)
With aid of assistant, raise forks to
approximately a +6 degree inclination
(TM 10-3930-673-10) and observe "Hi
A" LED indicator (5). "Hi A" LED
6
indicator should be illuminated after forks
5
are raised.
TR00324
(e)
Turn on autoleveler control in cab (TM
10-3930-673-10) and observe "Hi A"
LED indicator (5). "Hi A" LED indicator
(5) should remain illuminated as forks are lowering and go out when forks are level.
(f)
Turn off autoleveler control in cab and lower forks to approximately a 6 degree inclination. Observe "Hi B"
LED indicator (6). "Hi B" LED indicator should be illuminated after forks are lowered.
(g)
Turn on autoleveler control in cab and observe "Hi B" LED indicator (6). "Hi B" LED indicator should
remain illuminated as forks are raising and go out when forks are level.
(h)
If either LED indicator (5) or (6) remains illuminated when forks are level, adjust fork autoleveler switch
(refer to Para 8-20).
(i)
Remove level from forks.
(j)
If neither LED indicator (5) or (6) illuminates during tests above, check for voltage across "VS" and "GND"
terminals on autoleveler circuit board (4). If 24 VDC is not present, repair power wires supplying circuit
board (refer to Para 8-49).
(k)
If 24 VDC is present across "VS" and "GND" terminals, and neither LED indicator illuminates, replace
autoleveler switch and/or circuit board (4) (refer to Removal and Installation sections of this paragraph
for replacement of autoleveler circuit board and
Para 8-20 for replacement of autoleveler switch).
8-54

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