MACK

Caution

Shifting Instructions

Make sur e air essur e least psi and unit operating temperatur e befor e making range shifts. Always start This also applies dynamometer testing. When the truck stationary , NOT shift into range and then start moving the damage the synchr onizer may r esult.

The T313(L)(LR) a range - shifted transmission with forward highway speeds and extra gear the range. and ranges are controlled air - shift range selector .

Note: When making a SPLIT SHIFT from gear gear , the splitter switch must not actuated, either down, until the main box NEUTRAL. When making a SPLIT SHIFT the same gear a preselected gear , especially under a heavy load, the splitter will not shift until the driveline torque This can done depressing the clutch pedal and releasing it, backing f the throttle and reapplying The splitter switch must not either until IMMEDIA TEL Y before the driveline torque relieved. When making a RANGE SHIFT , important preselect the range This means that the range selector must moved its next position (up down) BEFORE the gearshift lever Then move the gearshift lever through NEUTRAL the next desired gear position. the lever passes through NEUTRAL, the range shift will completed.

Caution

not with the splitter and range selector tabs a stop light, flipping high low range - These contr ols e not intended for Such activity can adversely impact the life the https://www.truck-manuals.net/mack/

Upshift — For purposes explaining the shifting procedures through ALL gears, assume that the vehicle has a full load and will climb a slight grade.

Before moving the vehicle, the range selector must range and the splitter switchsplit. With the shift lever NEUTRAL, move the splitter - split (if needed), then the range range (if needed).

Refer the shift pattern and move the shift lever speed gear (LO - Apply accelerator , engage the and accelerate governed Shift through third and fourth speed double - clutching between the

T o continue while fourth gear (LOsplit), flip the range selector range (preselect), then move the shift lever through NEUTRAL fifth gear . the lever moves through NEUTRAL, the range shift will completed. Y are now fifth gear - split (HI range). Use a combination the splitter and shift lever continue shifting fifthsplit, sixthsplit, sixth - split and until you reach eighth - Remember double - clutch between

T o upshift from - split - split (in the same gear), accelerate the engine governed speed, move the splitter switch (preselect), depress the clutch and back f the accelerator pedal. Reapply the accelerator and engage the clutch when the audible shift heard, when the engine speed falls approximately 200 rpm. Depressing the clutch may not necessary break the driveline torque, but this will vary with road and load conditions.

T o upshift from a - split gear the next higher gears - split (in accelerate the engine governed then move the splitter switch you move the shift lever through NEUTRAL the next higher gear Note that the splitter switch must not actuated down the position until the main box

Downshift — Shift from eighth - split eighthsplit, then seventhsplit, seventh - split and (double - clutching between the gears), until you reach fifthsplit.

While fifth gear - flip the range selector down range then move the shift lever through NEUTRAL fourth gear (double - clutch and use the throttle the normal manner between the shift lever moves through NEUTRAL, the range shift will completed. Y are now fourth gear - split (LO range). Continue downshifting, using the shift lever the normal manner until you reach speed gear (LO range,split).

T o downshift from - split - split (in the same gear) engine speed move the splitter then release and reapply the accelerator audible shift completion should

T o downshift from a - split gear the next lower gears - split (in range) engine speed falls, move the splitter switch you move the shift lever through NEUTRAL the next lower gear . Note that the splitter switch must not actuated the position until the main box NEUTRAL.

Remember double - clutch between gears.

T313 and T313L Reverse — Reverse can used range only

T313LR 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

T313, T313L AND T313LR TRANSMISSION TIOS

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Rear Case, Side - Mounted O Operating Procedures (T313, T313L and T313LR)

When engaging the O —

Select - split using the splitter switch and select range using the range selector .

Note: The transmission MUST range and - split all times during O operation.

Depress the clutch pedal disengage the clutch.

Set the parking

Move the main box shift lever the NEUTRAL position.

Move the dash - mounted compound NEUTRAL control valve the position, which moves the synchro clutch a NEUTRAL position.

Engage the

Move the main box shift lever the desired ratio.

Release the clutch pedal engage the clutch.

Operate the O - driven load.

When disengaging the O —

Depress the clutch pedal disengage the clutch.

Move the main box shift lever

Disengage the

Move the dash - mounted compound NEUTRAL control valve the OFF which moves the synchro clutch back

Move the shift lever the desired main gear box ratio.

Release the parking

Release the clutch pedal engage the clutch.