Test Fork Autoleveler Switch and Circuit Board.

TM 10-3930-673-20-2

8-19. FORK AUTOLEVELER CIRCUIT BOARD TEST/REPLACEMENT (CONT)

NOTE

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

indicator should be illuminated after forks

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

(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