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TM 9-2320-304-14&P
2-3
Operating Instructions (Cont)
Legend for Figure 2-1. LHS Controls and Indicators
Key
Control or Indicator
Function
1.
Joystick
Controls operations of loading (LOAD) and unloading (UN-
LOAD) of flatracks.
2.
Hydraulic Selector Switch
OFF position: Joystick (1) not operational (LHS transit mode).
AUTO position: For normal pick-up and off-loading sequence
of flatrack.
MANUAL HOOK ARM (MAN H.A.) position: For picking up
and off-loading use on trailer, docks, and in event of failure to
automatic hook arm electronic circuits.
MANUAL MAIN FRAME (MAN M.F.) position: For picking up
and offloading on trailers, docks, and in the event of failure of
automatic main frame electronic circuits.
MANUAL TRANSIT (MAN TRANS) position: Used when au-
tomatic circuits have failed and MAN H.A. and MAN M.F. are
operated. This position must be selected if truck is to travel.
CRANE/SRW position: Not used on this vehicle.
3.
LHS NO TRANSIT Indicator LHS NO TRANSIT indicator (3) (red): Illuminates when LHS
is not correctly stowed in transport position.
4.
LHS OVER LOAD Indicator
LHS OVER LOAD indicator (4) (yellow): Illuminates whenev-
er main hydraulic relief valve is opened during loading or un-
loading. When light illuminates, driver will be warned that
LHS has reached an overload condition or that hydraulic sys-
tem is lifting very near maximum capacity. OVER LOAD indi-
cator will come on any time main relief valve is cracked open;
therefore, load or unload operation may not come to a com-
plete stop, but light will come on momentarily. This situation
would indicate that system is lifting near maximum capacity.
If the LHS is overloaded, the light illuminates and the system
is automatically blocked out. Off-load/on-load flatrack and at-
tempt second operation. If, during this second attempt, the
LHS shuts down, stop operation and redistribute weight or
reduce payload before attempting load or unload. When at-
tempting to load/unload Forward Repair System (FRS), manu-
al procedures must be followed or LHS overload system will
shut down the LHS system (Para 2-9d. and Para 2-9e).
5.
LHS Indicator
LHS indicator (5) (green): Illuminates when rotary hydraulic
selector switch (2) is in positions AUTO, MAN H.A., OR MAN
M.F.
6.
Power Take Off Switch
(PTO)
Supplies or shuts off electrical power to power take off.
7.
Circuit Breaker
Protects LHS electrical system from overload and damage.
Change 1
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