TM 5-3800-205-10-1
OPERATION UNDER USUAL CONDITIONS - CONTINUED
0005 00
OPERATE TRANSMISSION - CONTINUED
(2) Positions 3 through 6 are suitable travel speeds. These positions are powershift selected.
d.
Downshift one position at a time when reducing engine and ground speeds. Downshift when going downhill (to the
same gear used to climb the grade) or when operating on side slopes where high speed may compromise safety.
e.
At gross vehicle weight, top speeds for gear positions 1 through 6 are as follows:
(1) Position 1: 2.2 mph (3.5 kph)
(2) Position 2: 3.6 mph (5.8 kph)
(3) Position 3: 5.7 mph (9.2 kph)
(4) Position 4: 8.9 mph (14.3 kph)
(5) Position 5: 15.1 mph (24.2 kph)
(6) Position 6: 21.1 mph (34 kph)
Operate Transmission.
2.
a.
Depress service brake pedal and hold.
b.
Unlock shift lever lock.
c.
Release parking brake.
d.
Move transmission shift lever to position 1.
e.
Release service brakes and begin to move out.
f.
Upshift one position at a time as engine and ground speeds increase.
g.
Downshift one position at a time while at the same time reducing vehicle speed with service brake applications.
OPERATE PARKING AND EMERGENCY BRAKES
1.
Use parking brake to secure vehicle against movement when parked. NEVER leave operator's cab without applying park-
ing brake.
2.
Do NOT use parking brake to stop a moving machine. Use service brakes instead.
3.
If service brakes fail, apply brakes in an emergency using emergency brake control knob.
OPERATE DIFFERENTIAL LOCK
CAUTION
Excessive wheel spin and uncontrolled wheel spin can cause accelerated wear to powertrain components and
tires.
Improper use of differential lock control may damage components of differential lock.
1.
Engage differential lock control to prevent wheel slippage when traction is poor. Power will be equally distributed to each
wheel and both wheels will turn at the same speed.
2.
Anticipate using differential lock before wheel slippage occurs. Do NOT engage differential lock while one wheel is slip-
ping. Decrease engine RPM until wheel stops spinning, and then engage differential lock.
3.
Do NOT engage differential lock at high speeds.
4.
Do NOT turn (steer) machine while differential lock is engaged.
5.
Differential normally unlocks when pedal at floor is released. In areas of high resistance, it may be necessary to turn
machine slightly and decrease engine RPM, to assist in unlocking differential lock control.
0005 00-5
