Stihl RZ 900 Series Instruction Manual - Page 52

6. Re-install the rear drive tires. Torque the lug bolts to 74 85-95 ft.lbs. (115-129 Nm). Remove the jack stands from under the unit. Note: If a collection system is installed on the unit it is recommended that the rear suspension be adjusted stiffer due to the added weight of the collection system. To Adjust the Upper Mounting Position (Rear Shocks): 1. Park the unit on a flat, level surface such as a concrete floor. Disengage the PTO, engage the parking brake, and turn the ignition switch to OFF to stop the engine. 2. Chock the front wheels to prevent the unit from rolling. Raise the rear of the unit and secure with jack stands. The jack stands must be under the bumper of the unit. 3. Position the jack underneath the rear cross member of the transmission cradle and slowly raise the rear suspension to relieve the pressure on the upper shock mounting bolts. Note: This will require small adjustments to the jack's position. The shock should move freely on the mounting bolt when the pressure is relieved. 4. Remove the upper shock mounting hardware and pivot the shock to the next higher numbered position (see Figure 72). Adjust the jack to align the shock mounts to shocks. 5. Remove the jack from under the transmission cradle. 6. Remove the jack stands from underneath the unit. Battery Maintenance DANGER Be careful when handling the battery. Battery acid can cause severe burns. Avoid contact with skin. Wear protective gear (safety goggles/face shield and gloves) when working with the battery. Keep the battery out of reach of children. To avoid an explosion, keep open flames and sparks away from the battery, especially while charging. When removing or installing battery cables, disconnect the negative cable FIRST and reconnect it LAST. If not done in this order, the positive terminal can be shorted to the frame by a tool. Cleaning the Battery and Cables This unit is equipped with a maintenance-free BCIU1 battery. 1. Disconnect the cables from the battery, negative [-] cable first (B, Figure 74). 2. Clean the battery terminals and cable ends with a wire brush until shiny. 3. Reinstall the battery and reattach the battery cables, positive [+] cable first (A). 4. Coat the cable ends and the battery terminals with petroleum jelly or non-conducting grease. Checking Battery Voltage A voltmeter can be used to determine condition of the battery. When the engine is off, the voltmeter shows battery voltage, which should be 12 volts. When the engine is running, the voltmeter shows voltage of charging circuit which normally is 13 to 14 volts. A dead battery, or one too weak to start the engine, may not mean the battery needs to be replaced. For example, it may mean that the alternator is not charging the battery properly. If there is any doubt about the cause of the problem, see your authorized STIHL servicing dealer. If you need to replace the battery, follow the steps under Cleaning the Battery and Cables. Charging the Battery WARNING Keep open flames and sparks away from the battery; the gasses coming from it are highly explosive. Ventilate the battery well during charging. A dead battery or one too weak to start the engine may be the result of a defect in the charging system or other electrical component. If there is any doubt about the cause of the problem, see your authorized STIHL servicing dealer. To charge the battery, follow the instructions provided by the battery charger manufacturer as well as all warnings included in the OPERATOR SAFETY section of this manual. Charge the battery until fully charged. Do not charge at a rate higher than 10 amps. 52 stihlusa.com