2-11. PREPARING SEMITRAILER FOR OPERATION.
b. Operate leveling jacks to level semitrailer (para 2-1 2).
Open and close all doors to check operation of hinges and latching mechanisms.
On models M348A2H and M373A5, ground semitrailer with ground rod.
Use power cable to connect external power source to the semitrailer through the power entrance
receptacle. Turn switch and circuit breakers to ON position and ensure that all lights, switches, and receptacles
g. On models M348A2H, M373A2D, M373A3, M373A4, and M373A5, start air conditioner and check
operation of thermostat and controls (para 2-15, 2-16, or 2-17).
h. On models M373A2D and M373A5 start heaters and check operation of thermostats, fuel pumps, and
2-12. OPERATING LEVELING JACK.
a. Pull out two retaining pins at rear and allow
leveling jack (3) to swing down into vertical position.
b. Pullout retaining pin (8) from side brace(l).
Pin side brace to gusset (7) on side of leveling jack (3).
c. Swing rear brace (2) up Into position and
pin in place.
d. Remove jack pad (5) from clamp on front of
dolly assembly. Place jack pad under jack screw (4).
e. Remove handle (6) from clamp In pintle
well. Install handle through hole in jack screw (4).
f. Turn jack screw (4) with handle (6) until
leveling jack (3) reaches the desired length to level the
2-13. OPERATING LANDING GEAR.
a. Early Model.
(1) Remove handcrank (3) from stowage on right-hand landing gear brace (2).
(2) Connect handcrank (3) to crankshaft (1) on right-hand landing gear leg. Turn handcrank clockwise to
lower landing gear and raise front of semitrailer. Turn handcrank counterclockwise to raise Ianding gear and Iower front