4-12. UNIT TROUBLESHOOTING (continued).
11. HOOK ARM DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY) (continued).
(1) Open hydraulic cabinet cover.
(2) Loosen four screws on main junction
box cover and open cover.
Electrical power must be shut off
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
(3) Remove connector from the hook arm
A reading of infinity indicates an
Junction box terminal 17 is
connected to one side of the
connected to the other side.
of wire, and check multimeter for
continuity. Check for continuity
position 1, and terminal strip, position
between position 2 in the connector
and terminal strip, position 18.