TM 9-2330-203-14&P
1-7.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Con't).
M197 AND M198
Key
Component
Description
After connecting to towing vehicle, semitrailer and dolly brakes can be actuated by
6
towing vehicle's brake controls.
Pressure Tank
Equipped with draincock for draining moisture and relieving air pressure in dolly
7
airbrake system. To open draincock, turn handle counterclockwise; to close
draincock, turn handle clockwise counterclockwise; to close draincock, turn handle
clockwise.
Emergency Air
After connecting to towing vehicle, semitrailer and dolly brakes can be actuated by
8
towing vehicle's brake controls.
TA510656
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