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TM 5-2420-224-10
The main shift lever (1) shifts all speeds no matter what gear range or intermediate speeds are preselected. The
group shift lever (2) has three shifting functions: Gear Range I-low group; Gear Range II-high group; and R-
reverse. Intermediate speeds are main transmission reduction speeds and can be engaged and disengaged while
driving either forward or in reverse. Position of main shift lever is not important. Shift gears only when clutch is
fully depressed. Shift to reverse only with vehicle stopped and clutch depressed.
WARNING
Select proper gear before negotiating severe upgrade or downgrade. Do not de-
clutch on severe grade. Do not slip clutch during front loader operations. Failure to
do so could result in personal injury.
Never shift transmission into neutral when traveling downhill. Control of vehicle
could be lost, resulting in serious personal injury and/or damage to drivetrain when
shifting back into gear.
(1) Down-Shifting. A down-shift from one gear to a lower one can be made at any time to maintain an efficient
engine speed. Maintain one gear when traveling up a hill and shift only when past crest.
(2) Up-Shifting. An up-shift from one gear to a higher one can be made at any time. The most efficient use of
each gear range is achieved when minimum engine rpm of 1600 is reached in the gear range before shift is
made.
2-81

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