MACK TM309M Shifting Instructions CAUTION

Make sur e air essur e least psi and unit warmed befor e shifting the Use the clutch brake for shifting into first and r everse gears only . not use the clutch brake shift out gear . car eful not overspeed the engine during downshifting. Damage powertrain components can r esult.

The TM309M a non - synchronized transmission having a total nine speeds (6+3) with air shifted non - synchronized compound section. This and auxiliary compound section controlled air - shift range selector valve located the shift lever . The range has three low gear ratios. range there are six forward gears which can shifted the normal manner , but remember double - clutch whether moving down through the gears.

F o r n o r m a l h i g h w a y u s e , s t a r t i n H I r a n g e , first gear and shift through fifth and The ratio step between fifth and sixth smaller than all the other ratio The three gears range are designed for f - highway use and slow - moving operations (curb material heavy steep Only start the lowest gear necessary move the The extreme gear (1st low) intended for vehicular speed control and not for torque

Reverse used range only . T o avoid transmission damage when shifting Forward Reverse Reverse Forward:

• Bring vehicle a

• Move lever NEUTRAL.

• Select low

• Select F R desired.

• Select lowest lever gear

• Release and depress clutch pedal.

• Select desired gear

Caution

V ehicle operators must use extr eme caution operating a truck the higher r everse Higher r everse gears will oduce high r everse speeds which may difficult for drivers contr dependent terrain obstacles.