170 OPERA TION

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Downshift T o downshift the shift from eighth sixth and fifth (HI double - clutching between While still fifth gear , flip the air - shift range selector range then shift through NEUTRAL fourth gear you shift through the range shift will Move the shift lever second and double - clutching between

T309 and T309L Reverse — Reverse can used range only .

T309LR Reverse Reverse can used and range.

T o m a k e a r a n g e s h i f t i n r e v e r s e , bring the truck a complete Flip the range selector the range desired Move the shift lever out reverse through and then back into reverse the lever moves through the range shift will

Caution

T o avoid transmission NOT change range while moving

C0029346 https://www.truck-manuals.net/mack/

Preferred Methods for Engaging T309

(or any - Range Gear) for

Note: OPTIONAL RANGE ENGAGEMENT INDICA T LAMP the vehicle equipped, indicator lamp, located the cab, will illuminate indicate that the range shift has https://www.truck-manuals.net/mack/

Method O

Operation with Wheels OFF the Ground

Position the vehicle for power take - f operation.

Stop the vehicle and apply the spring brakes.

Raise the vehicle wheels f the

Shift the transmission NEUTRAL.

T urn

Place the range selector HIGH.

Fully depress the clutch pedal and shift the transmission

Slowly release the clutch pedal until the transmission range clutch engagement heard; , equipped, until the range engagement indicator lamp lit.

Fully depress the clutch

10. Shift the transmission EIGHTH gear .

1 Release the clutch pedal begin O operation.

Method O

Operation with Wheels the Ground

Position the vehicle for power take - f

Stop the vehicle and apply the spring

Keep the vehicle wheels the ground.

Shift the transmission

Place the range selector HIGH.

Fully depress the clutch pedal and shift the transmission

Slowly release the clutch pedal until the transmission range clutch engagement heard; , equipped, until the range engagement indicator lamp lit.

Fully depress the clutch

T urn

Shift the transmission EIGHTH gear

1 Release the clutch pedal begin O operation.