Maintenance30Tire PressureMaintain the air pressure in the front and rear tires asspecified. Uneven tire pressure can cause uneven cut.Check the pressure at the valve stem after every 50operating hours or monthly, whichever occurs first(Fig. 23). Check the tires when they are cold to getthe most accurate pressure reading.Pressure: 15 psi (.103 kPa) rear and castor tires1m–1872Figure 231. Valve stemFuseService Interval/SpecificationThe electrical system is protected by a fuse. Itrequires no maintenance, however, if the fuse blowscheck component/circuit for malfunction or short. Toreplace fuse pull out on the fuse (Fig. 24) to removeor replace it.Fuse: F1–7.5 amp, blade-typem–31001Figure 241. Fuse 7.5 amp