Caution: If you do not park the vehicle properly, it can roll. If you have left the engine running, it can move very quickly. You or others could be injured. To be sure the vehicle will not move, even when you are on level ground, follow the steps below.

1. With the engine running, shift the two-speed rear axle into low. To be sure it's in low, you'll need to move the vehicle in gear just a little.
2. Hold the regular brake pedal down with your right foot.
3. Apply the parking brake.
4. Shift the transmission to NEUTRAL or PARK (P).

If your vehicle has hydraulic brakes, it has a parking brake lever. The lever is located in the center console.

Your vehicle may also be equipped with an automatic transmission which has a center console shift lever. This lever will have a PARK (P) position on the shift indicator. Even when PARK (P) is selected, be sure to apply the parking brake firmly so the vehicle won't move.

It is recommended that the propshaft-mounted parking brake be burnished as part of the new vehicle break-in. The parking brake will work best after it has been burnished following these instructions:

Make 10 stops, using the parking brake hand lever, from 20 mph (32 km/h) about 2 1/2 miles (4 km) apart. Between stops, drive the vehicle at 20 mph (32 km/h).

To apply the parking brake, pull the lever all the way up. The park brake light will come on when the parking brake is applied. Then shift the transmission to NEUTRAL (N) or PARK (P). The vehicle must be stationary when applying the parking brake, except while burnishing the parking brake linings. See "Propshaft Brake Burnish Procedure" earlier in this section.

If your parking brake doesn't hold the vehicle when applied, see your dealer to adjust your parking brake properly.

To release the parking brake, first push down the regular brake pedal. Then, while pressing in the release button, push the parking brake lever all the way down and shift the transmission to NEUTRAL (N). The park brake light will stay on if the parking brake is not fully released.

Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Verify that the parking brake is fully released and the brake warning light is off before driving.

Caution: When the yellow SYSTEM PARK and the red TRAILER AIR SUPPLY knobs are both pushed in, your rig will be free to move. It could strike someone or something. When both of these knobs are pushed in, hold the regular brake pedal down to keep your rig from moving.

If your vehicle has air brakes, you may have these controls.

Pulling the system park (yellow) knob out applies the parking brake. The park brake light will not come on when the air parking brake is applied.

Vehicles built for use as tractors or towing vehicles may also have the trailer air supply (red) knob.

To charge a trailer's air brake system do the following:

1. Move your tractor into the proper position.
2. Apply the parking brake by pulling the system park (yellow) knob out.
3. Hook up the trailer air system properly.
4. Get into the tractor.
5. Push and hold down the regular brake pedal.
6. Push in both the system park (yellow) and the trailer air supply (red) knobs. This will charge your trailer's air system.

After a few minutes, the trailer system should be fully charged. When it is, the air pressure gage will show about 125 to 135 psi (862 to 931 kPa).

For driving with a trailer, the yellow and red knobs must be pushed in. It's the same when you're not pulling a trailer except that the trailer air supply (red) knob must be pulled out.

Caution: If you apply any one of the air brake parking controls while the vehicle is moving, the rig will stop suddenly. If you are not ready for this, you or others could be injured. Do not apply any one of these controls while you are driving, unless you have to make an emergency stop.

If the air pressure drops below 60 to 70 psi (413 to 482 kPa), the primary brake light will come on. If the air pressure drops to 40 to 45 psi (275 to 310 kPa), the system park (yellow) knob will automatically pop out and apply the spring brakes on the trailer.

If you ever have a complete loss of air so that your air brakes automatically apply, the tow operator can release the parking brakes to tow the vehicle.

Caution: If your vehicle is left in gear, the engine can start if the vehicle starts to roll. This can easily happen if you have the diesel engine. Shift the transmission into NEUTRAL (N) before you leave the vehicle.