Operator Cab and Controls - Section 32 3/10 OM3216 Page 32-42 Refer to the retarding capacity chart in the cab for the maximum safe speeds for descending a grade. Recommended Set Speeds Set the travel speed so that the engine speed is above 1800 rpm. The retarder oil temperature gauge must remain at normal operating temperature (in the white range on the gauge). If the retarder oil is close to overheating, the set speed is automatically reduced 1 km/h (0.6 mph) every 3 seconds. The set speed will not drop below 10 km/h (6 mph). To set the ARSC: 1. Turn on ARSC switch (3, Figure 32-21) to turn the system on.
ARSC pilot lamp (4) will illumi- nate to alert the operator that the system has been activated. The ARSC set speed indicator (5) will turn on and the previous set speed will be displayed. If the previous speed was can- celled, a 0 will be displayed. 2. When the truck speed reaches the desired set speed, press button (a) on the ARSC lever to set the travel speed. The set speed will be dis- played on the ARSC set speed indicator (5). The set speed indicator may differ slightly from the speedometer display. Refer to the retarding capacity chart in the cab for the proper speed for descending a grade. 3. To adjust the set speed, tap up (b) on the lever to increase the speed.
The speed will increase by 1 km/h (0.6 mph). To decrease the speed, tap down (c) on the lever. The speed will decrease by 1 km/h (0.6 mph). To cancel the set speed, pull the lever towards the rear of the cab. The set speed indicator will display a 0. 4. To turn the system off, turn ARSC switch (3) off.