MOVING THE VEHICLE — GENERAL INFORMA TION

Braking

A void sudden Constant sudden stops may negatively fect braking performance and driving When leave the clutch (if equipped) engaged long possible use the braking fect the

Caution

When using the braking effect the final gear selection gear selection too the vehicle will buck which could cause loss contr

Shifting

Operate a gear low enough allow the engine accelerate (or maintain) governed engine speed when applying full Allowing the engine lug causes excessive strain the which could damage cylinder However , sure not overspeed the

Danger

Always select the proper gear ratio BEFORE descending a grade (to avoid a runaway vehicle and stay within safe and legal speed limits). NOT coast down hills. Gear ratios should selected allow the engine operate between peak torque and rated speed.

Caution

not permit a load drive the engine above governed When descending steep use lower gears and watch the tachometer Overspeeding will cause sever e drivetrain damage and eventually destr the

Caution

Running the engine a speed that too low for the load (or grade the r oad) can cause damage the

Shifting the proper time will result increased fuel ficiency , well a decrease costly Remember that once the engine falls below peak both torque and horsepower will drop f very rapidly Before this downshift the next lower gear

For vehicles with transmissions that have extreme reduction gearing coupled with high rear - axle loads, a torque - limiting device should used. This device limits the amount fuel that can delivered the engine and prevents overloading drivetrain components while extreme reduction gears.

Always use the same gear going downhill uphill. This will reduce brake wear and prevent damage the engine from overspeeding.

Engine T emperature

Before entering high - speed traf fic allow the engine reach normal operating A normal operating range between 77°C and 104°C (170°F and 220°F) for stationary

Clutch (If Equipped)

T o avoid shock release the clutch pedal smoothly , without shock - loading the driveline (especially grades while carrying heavy not ride the clutch Premature wear the clutch facing and release bearing may

Caution

Always use the lowest drive gear combination start the vehicle moving avoid ematur e clutch failur

T o move the vehicle, start the engine and wait until reaches operating temperature.

Disengage the clutch pushing the pedal the floor

Shift the transmission into first gear (see ransmission Shifting for specific

Release the parking brake.

Caution

the Parking Brake indicator NOT attempt move the vehicle because driveline damage may r

Engage the clutch smoothly allowing the clutch pedal come slowly . For comfortable starts, not apply the accelerator until the clutch begins engage.

Caution

Never allow your foot ride the clutch pedal when the clutch This will cause ematur e failur e and incr eased clutch wear the vehicle gains continue shifting until the transmission the highest gear possible (with engine operating

Note: When the vehicle equipped with a torque - limiting the engine must warmed operating temperature before attempting move either REVERSE

Clutch Brake Operation

The clutch brake designed stop the rotation the transmissions input shaft while the truck standing still. This makes shifting into first reverse gears easier

C0029340

Normal Clutch Pedal T ravel Depress Pedal last (1/2 inch) inch) Engage Clutch Brake (amount clutch brake travel varies depending the system and overall tolerances)

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