TM 9-2320-360-10
NOTE
Locking tab on switch must be pressed down to permit switch to be
pressed ON.
(3) Press engine brake retarder ON/OFF switch (1) to ON (lowest) position for reduced engine
braking.
(4) Press engine brake retarder HI/LO switch (2) to HI (lowest) position for maximum engine
braking.
(5)
Lift foot off the throttle control (3). Engine brake will automatically slow truck.
(6) Optimum braking occurs with engine between 1650 and 2100 rpm. Select appropriate
transmission range and engine brake to maintain desired effect. Do n over "rev" engine
during braking.
(7) If more braking is required, set ENGINE BRAKE switch (1) to HIGH.
(8) Check that tachometer (4) reads between 1650 and 2100 rpm whenever engine brake is
used.
Change 1 2-134.1 (2-134.2 blank)