Stihl RZ 261 Instruction Manual - Page 36

11. Turn the adjustment nut (E) until the measurement of 1/2" (1,3 cm) is achieved. 12. Tighten the jam nut. 13. Install the mower deck guards and the floor pan. 14. Run the mower under no-load condition for about five (5) minutes to break in the new belt. Transmission Drive Belt Replacement This zero-turn riding mower is equipped with a transmission drive belt (A, Figure 46) that is located under the engine deck of the unit. 46 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 (A, Figure 47). 47 Inspect the Condition of the Transmission Drive Belt Service Interval: Every 400 hours or annually. 1. Park the unit on a flat, level surface such as a concrete floor. Engage the parking brake, disengage the PTO, turn the ignition switch to OFF, and remove the ignition key. Wait for all moving parts to stop. 2. Visually inspect the belt (A, Figure 46) for cracks, frayed edges, burn marks or any other damage. If the belt is damaged it must be replaced. 3. To replace the transmission drive belt the PTO clutch must be removed from the engine's crankshaft so it is recommended that the procedure for replacing the transmission drive belt be an authorized STIHL servicing dealer only service procedure. 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 (B). 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 36 stihlusa.com