driving.
(1) Fully retract the boom and stow the jib and rooster sheave. (2) Stow the auxiliary hook in the specified position.
(3) Fasten the main hook in its stowage position on the front side of the machine.
(4) Fully retract the derrick cylinder and face the boom forward with respect to the machine.
(5) Engage the slewing brake and slewing lock to immobilized the superstructure.
(6) Engage the winch drum lock.
(7) Fully retract the four vertical cylinders and the four horizontal cylinders to stow the outriggers. Always insert the stopper pins and check that the outriggers are completely stowed away.
(8) Always set the PTO switch to "OFF".
(9) Check that the tires are at the rated pressure. (Air pressure: 900kPa (9.00kgf/cm2) )
(10) Check that rear steering lock/release switch is set to the lock position and that the rear steering lock release indicator lamp on the cluster meter panel is not lit.
① Move the shift lever to the "N" position.
② Check that the suspension operation OK indicator lamp is lit.
③ Push the suspension lock/release switch to the lock release side to extend the suspension cylinders to the position required for driving.
(1) Normal driving
Move the shift lever to the "D" position and press the accelerator pedal. As the machine accelerates, the computer will read its changing speed and automatically change from speed 1 to speed 4 in response to the machine speed.
If you want to maintain a low speed, select the position "1", "2" or "3" as required.
Do not return the shift lever to the "N" position while the machine is in motion.
(541A-0134-0E)
NOTE
If you move the shift lever to a lower position before decelerating to the shift down speed, the transmission will not shift until the speed has reduced sufficiently.
(2) Driving on slopes
1) When climbing a slope, move the shift lever to D, 3, 2 or 1 depending on the gradient.
2) When driving down a slope, take great care not to deplete the foot brake force because loss of brake force is extremely dangerous. Use the foot brake effectively in short bursts as necessary to minimize heating. At the same time, shift down to take advantage of engine braking and use the exhaust brake for efficient speed reduction. If you drive with your foot resting constantly on the brake pedal, an accident is only a matter of time.
Precautions when driving down a slope
1. Make a constant habit of testing your brakes before starting to move down a steep slope or a long gentle slope. If you notice during the descent that your brakes are weak, there is nothing you can do about it.
2. Do not use the foot brake excessively while driving.
Instead reduce speed by engine braking through appropriate down-shifting and use the exhaust brake, supplementing these as necessary with short bursts of foot brake. Excessive use of the foot brake risks overheating and reduced braking force as well as bubbling in the brake fluid (vapor lock) which can completely disable the foot brake. Intermittent use of the foot brake serves to minimize heating and allows adequate braking force. Use of the brake for long periods with the pedal depressed half way leads to overheating which reduces braking force and invites accidents.
3. After periods of parking or brief stops, depress the brake pedal to check brake function before you move off again. For a short period after stopping the machine (5－20 minutes), the heat of the brake is transmitted through the brake fluid, so the temperature of the brake fluid is higher than it was while the machine was in motion. The brake fluid can become very hot after heavy brake use on a long downhill or after a sudden stop. If the machine is at rest after that, bubbles can form in the brake fluid, completely disabling the foot brake by a phenomenon called soaking.
If you do not notice this situation until after you start driving, it is already too late. Instead make a habit of applying the foot brake as you start to move the machine to gauge its strength. 4. Take care not to overrun the engine when driving downhill.
Excessive speed while driving downhill can cause the engine to overrun. If the engine overruns, the overrun warning lamp lights and an intermittent buzzer sounds. If this happens, use the foot brake immediately to reduce speed.
Engine overrun can cause seizure and ultimately destruction of the engine, so take care to avoid it.
5. Before starting to descend a steep slope, choose the gear that you would use to climb that slope and shift to that position.
6. Exercise caution when shifting down to descend a steep slope.
If shifting down does not reduce speed adequately, shifting down to another lower position will not shift the transmission.
If you are driving down a slope with gear 1, 2 or 3 selected and the machine's speed exceeds the allowable speed range for the gear you are using, the transmission will automatically shift up to accommodate the machine's speed. In this case any engine braking effect will be lost. Take great care to ensure that the machine's speed does not exceed the range for the shift
Before driving on the road, check that the lamps on the high/low speed switch and rear steering lock/release switch and two/four wheel drive switch are not lit.
(611A-0027-0E)