Controls and Indicators (Cont)
Figure 2-5.1. (FHTV Only) Instrument Panel Controls and Indicators (Sheet 3 of 3).
Control or Indicator
Engine Start Switch
Three position switch. Straight up is OFF
position. ON position operates electrical
system. START position operates engine
cranking circuit. When switch is released after
engine starts, switch will return to ON position.
LOW AIR Indicator
Lights (red) and remains lit until airbrake air
pressure in each section of dual system is
between 60 psi (414 kPa) to 75 psi (517 kPa).
Buzzer will sound anytime indicator is lit.
AIR PRESS Gage
Shows air pressure (in psi and kPa) in both
sections of airbrake system. Green needle
shows front section air pressure. Red needle
shows rear section air pressure.
Shows state of charge of batteries and
alternator voltage output.
Shows alternator output in Amperes.
TRAILER AIR SUPPLY Control
Charges trailer airbrake system.
DIGN REQ Switch
Activates troubleshooting system used by
maintenance to diagnose engine problems.
Lights (red) when oil pressure is low or water
temperature is too high.
LHS Indicator (LHS Only)
Lights (green) when Rotary Hydraulic Selector
Switch is in auto, MAN H.A., or MAN M.F.
LHS NO TRANSIT Indicator
Lights (red) when LHS is not correctly stowed in
LHS OVERLOAD Indicator
Lights (yellow) when LHS has reached an
overload condition or the hydraulic system is
lifting very near maximum capacity.