TM 9-2330-203-14&P
2-10. COUPLING DOLLY TO TOWING VEHICLE (Con't).
e. Connect intervehicular air hoses (2) to towing vehicle air couplings (3). Ensure that towing vehicle air coupling
marked SERVICE is connected to dolly air coupling marked SERVICE and that towing vehicle air coupling marked
EMERGENCY is connected to dolly air coupling marked EMERGENCY. Connect air couplings on opposite end of
intervehicular air hose to dummy couplings in dolly stowage compartment until ready to connect to semitrailer.
f. Open two air shut-off valves on towing vehicle to pressurize dolly airbrake system.
g. Connect proper intervehicular cable, 12- or 24-volt (1), to towing vehicle receptacle (4).
NOTE
Step h is for M197A1 and M198A1 only.
h. If dolly is being towed without semitrailer, connect other end of intervehicular cable to rear chassis wiring
harness.
i. Remove safety clip and lockpin (14) securing leg brace (13) to landing leg (12). Raise leg brace and secure it in
bracket (11) on frame at front end of dolly.
j. Raise landing leg (12) by turning handcrank (10) counterclockwise until shoe (15) is off ground. Swing landing leg
back and up into its bracket (16) on frame (17). Secure landing leg with lockpin and safety clip (14). Landing leg and leg
brace (13) must always be raised and locked in traveling position before dolly is towed.
2-11.
COUPLING SEMITRAILER TO DOLLY.
a. Position chock blocks behind semitrailer wheels.
b. Determine if semitrailer is at proper height for couping. If not, raise or lower front of semitrailer using its landing
gear.
c. Close shut-off valves on towing vehicle. Disconnect air couplings from dummy couplings in dolly stowage
compartment and connect to semitrailer air couplings. Ensure that dolly air coupling marked SERVICE is connected to
semitrailer air coupling marked SERVICE and that dolly air coupling marked EMERGENCY is connected to semitrailer air
coupling marked EMERGENCY.
d. Open shut-off valves on vehicle.
TA510664
2-9
