182 OPERA TION

With the vehicle standing apply the clutch brake pushing the clutch pedal all the way the floor: the clutch brake applied when the clutch pedal f u l l y d e p r e s s e d (approximately the last (1/2 inch) inch) pedal travel past clutch brake pedal varies between the air assist and non assist release The variance includes general tolerances and amount pedal free - play T ypically about the last (1/2" inch) the air assist and about the last inch) the non assist control

Note: When the clutch a slight but definite resistance clutch pedal downward travel will felt approximately the last (1/2 inch)

Caution

V ehicles equipped with the air assist clutch control system use less pedal The clutch brake engages sooner the pedal stroke than conventional non assist T o avoid system careful not engage the clutch brake during normal

Shift the transmission into first reverse gear , engage the clutch and The clutch brake only used when the vehicle stopped and shifted into first reverse not designed used upshifting

Caution

Clutch brake damage may r esult used while the vehicle The clutch brake must NOT used when making a downshift

Double - Clutching

Double - clutching a way bring the speed the transmission gears into synchronization that the shift can made without a clash. The engine used speed the counter shaft for a downshift and slow down for upshift.

Note: For all non - synchronized transmissions, double - clutching necessary downshifts and advisable use the torque - limiting clutch brake engage first and REVERSE gears and double - clutch for gear ratio changes.

Depress the clutch pedal and shift

Release the clutch pedal and increase (downshift) decrease (upshift) engine speed until roughly corresponds the road speed the desired gear .

Depress the clutch pedal and complete the shift. Then release the clutch pedal.

POWER T AKE-OFF (PT OPERA TION

the vehicle equipped with a Power T ake - f (PT unit, sure read the following section.

Precautions

Danger

Power T ake - f (PT units and related equipment can very dangerous. Any O installation, repair replacement should include a warning indicator light which indicates O engagement. The light must located close the O control and clearly visible the operator .

Danger

O units are driven engine drivetrain components (flywheel, crankshaft, transmission). not attempt service the O and related units unless the engine shut down.

Danger

Always keep body parts and loose - fitting clothing out the range drivetrain components, personal injury may result.

Danger

Always aware the current O status (engaged disengaged) and the position the vehicle body (dump body controlled etc.). sure disengage the O when not use.

Danger

Classification

Rear - mounted O units, for MACK transmissions, are categorized according operation.

Intermittent Service The O unit under for less than seven minutes and then allowed cool before operated

Note: a O unit operated for less than seven minutes but allowed cool down before operating again, considered Continuous Service.

Continuous Service — The O unit operated, under load, for seven minutes more.

Note: Rear - mounted O units operating under the Continuous Service guideline must not run more than 70% the O output - rated torque/horsepower

Locations

The first choice location for Side - Mounted either the O openings the main box.

The second which the compound O restricted those applications specifically requiring multi - speed with reverse capability , such some mechanical winches unique speed multiple O However , a word caution order when using these Operators should trained understand and follow the proper operating procedures described the cab and avoid using the neutralizing feature a power disconnect for vehicle

Operating Procedures

Specific O operating procedures are described the end applicable transmissions the following section.