4. With aid of an assistant, prepare semitrailer load for uncoupling (refer to TM 5-2330-378-14&P).
5. Ensure handbrake control (3) is off.
JACOBS
CAUTION
ENGINE BRAKE
3
4
Figure 16.
6. Pull out TRAILER AIR SUPPLY control (4).
7. Disconnect air lines (5) from semitrailer and stow air lines on tree (6).