HT25 - LUBRICATION 65 om0450h.eps om0456h.eps Fill at one plug and use the other to check oil level. Check oil level every 100 hours. Position gearbox as shown. Oil should be level with plugs. Fill at one plug and use the other to check oil level. Change oil after first 100 hours of operation and every 1000 hours thereafter. To change: Remove both plugs and drain the oil. Position gearbox as shown. Position gearbox with plugs aligned horizontally. Track Planetary Oil p GROUND DRIVE Check Change