Air filterHour meterAir Filter replacementThe air filter is mounted in the bottom of the warming unit(See Figure 4).Tools/EquipmentPhillips-head screwdriverService FrequencyEvery 6 months or 500 hours of use.MethodDisconnect the warming unit from the power source.1.Remove the M6 x 25 pan-head screw on the bottom on the2.unit. The filter should slide out easily.Record the hour meter reading and date on the new air3.filter label. The hour meter is located in the lower leftcorner of the top warning label (see Figure 4).Slide the new filter into the base of the unit.4.Replace the M6 x 25 pan-head screw on the bottom on the5.unit.Reconnect the warming unit to the power source.6.Record the hour meter reading and maintenance action7.taken in the Maintenance Log section.Figure 4. locationof Air Filter andHour MeterBair Hugger Model 505 Service Manual 9