Stihl RZ 142 Instruction Manual - Page 31

33 1. Tighten the knob (A, Figure 35) of the faster wheel by 1/2turn (clockwise) increments until the unit travels (tracks) straight. WARNING DO NOT adjust the unit for a faster overall speed forward or reverse than it was designed. 35 Ground Speed Control Lever Adjustment 1. Loosen the ground speed control lever mounting hardware (A, Figure 34) to adjust the levers forward and backward. 2. Remove the hardware to raise or lower the levers. 3. Always be sure to adjust both levers so that they are aligned (B, Figure 34). 4. After adjustment is complete, tighten the hardware to 13 lb-ft (18 Nm). 34 Checking Tire Pressures Tire pressure should be checked periodically (see Figure 36), and maintained at the levels shown in the Specifications chart. Note that these pressures may differ slightly from the "Max Inflation" stamped on the side-wall of the tires. The pressures shown provide proper traction and extend tire life. 36 Speed Balancing (Tracking) Adjustment If the unit drifts to the right or left when the ground speed control levers are in the maximum forward position, the top speed of each of these control levers can be balanced. Only adjust the speed of the wheel that is traveling faster. Cutting Height Adjustment The deck lift pedal adjusts the mower cutting height. The cutting height is adjustable between 1-1/2" (3,8 cm) and 4-1/2" (11,4 cm) in 1/4" (0,64 cm) increments. To adjust cutting height: 31