MaintenanceOIL LEVEL IN THE DIFFERENTIAL GEARSTo check the oil level in the front and rear differentialgears: Stop the machine on a level ground and engagethe parking brake. Loosen level plug and check if oil is level withthe hole. If necessary, top-up through hole until oilcomes out from hole . Refit and tighten plugs and .To change the oil: Place a container of suitable size under drainplug . Loosen the drain plug, the level plug and thefiller and allow oil to flow out from the reductiongear. Refit and tighten drain plug . Add new oil through the filler until it is level withhole . Refit and tighten plugs and .OIL LEVEL IN THE (front/rear) WHEELREDUCTION GEARSTo check the oil level within the wheel reductiongears: Stop the machine on a level ground and ensurethe parking brake is engaged and plug finds onthe horizontal axis. Clean the plug all around, then remove it andcheck if oil is level with the hole. If necessary, add new oil through hole until it islevel. Refit the plug.To change the oil: Stop the machine and ensure the plug is orientedalong the vertical axis. Place a container of suitable size under thereduction gear plug. Unscrew plug and drain any oil from the reductiongear. Rotate the wheel by 90° until the plug finds againon the horizontal axis. Add new oil through hole . Refit and tighten plug.SERVICE INTERVALRunning-in _________ Within the first 10 hoursOrdinary _________________ Every 250 hoursSERVICE INTERVALRunning-in _________ Within the first 10 hoursOrdinary _________________ Every 250 hoursFilling plugDrain plugLevel plugPart No. 57.0009.0454 GTH-4013EX - GTH-4514EX - GTH-4017EX 79Operator’s ManualSecond Edition - Second PrintingCourtesy of Crane.Market