42
3 Description and Operation
9. With the brake treadle FULLY applied, push in BOTH the
parking brake control (yellow) and the trailer air supply
(red). This will charge the trailer air supply and release the
trailer spring/parking brakes.
10. After the tractor air system is fully charged, move the
transmission shift lever to the proper gear and release
pressure on the foot-operated brake treadle. Allow the
vehicle to roll a VERY SHORT distance and then depress
the brake treadle again to stop the vehicle. This procedure
will ensure that the service brakes on the trailer are working
properly. NOW, and ONLY NOW, are you ready to move
("SPOT") the trailer.
11. Once the trailer is relocated and the vehicle combination is
completely stopped, place the shift lever in NEUTRAL and
pull out on the trailer air supply control (red). This will apply
the trailer parking brakes only. The parking brake control
(yellow) should remain "in" with the tractor parking brake
released.
12. Using the boom control lever, lower the trailer until the
trailer supports are resting completely on the ground.
13. Disconnect and STORE the air lines and electrical cable.
14. DEPRESS and HOLD the fifth wheel unlatch control valve
as you slowly pull away from the trailer. Once the fifth
wheel is completely clear of the kingpin, release the fifth
wheel unlatch control and go to the next trailer.
FAILURE TO READ AND FOLLOW ANY OF THE
FOLLOWING WARNINGS MAY LEAD TO SERIOUS INJURY
OR DEATH.
When the vehicle is operated on public streets or
highways, the fifth wheel manual secondary lock MUST be
engaged and the fifth wheel MUST be in the DOWN
position.
NEVER raise or lower the boom while the vehicle has a
trailer attached and is in motion.
DO NOT EXCEED 15 M.P.H. (24 K.P.H.) WHEN TOWING
TRAILERS. Operating at speeds in excess of 15 M.P.H.
(24 K.P.H.) may lead to loss of vehicle control. NEVER take
turns at excessive speeds, as this may cause the vehicle
to roll over. The majority of all rollover accidents are
caused by excessive cornering speed. ALWAYS SLOW
DOWN WHEN CORNERING.