−27−Maintenance of the main unit616-1 Change of engine oilRefer to the engine's instruction manual for handling of theengine.Change the oil after the first 50 hours1)of operation, and change it for every100 hours of operation from there on.Remove drain plug on the oil pan. If2)this is done while the engine is warm,the oil can be drained completely.Drain plugCaution Use the engine oil higher than the API service classification●●CF class.The engine oil's temperature is very hot immediately after●●the operation. Change it after waiting for a while to preventbeing burned, when removing the drain plug.6-2 Change of hydraulic oilFirst change the hydraulic oil after the1)f i r s t 1 0 0 - h o u r o f o p e r a t i o n , a n dc h a n g e i t i n t h e s h o r t e r p e r i o dbetween the one year and 500-hoursoperation from the next.Always replace the hydraulic filter2)when changing oil.Remove the drain plug on the bottom3)of the hydraulic oil tank, and drain thehydraulic oil.Right mower unitHydraulic oil tankDrain plugDrain and replace the hydraulic oil if you notice the presence of water or foam in4)the oil (emulsifying), or contamination (lack of transparency).Use Shell Tellus 46 or equivalent products for the hydraulic oil.5)The capacity of the hydraulic oil tank is approximately 24Liters.●*Caution The hydraulic oil's temperature is very hot, immediately●●after operation. Change only after waiting for a while toprevent from being burned, when removing the drain plug.Do not overfill●*Cartridge filter is equipped at the backside of left front tyre.Cartridge filter6-3 Inspection of oil leakAll of the fittings for the hydraulic hoses, pumps, cylinders etc. may loosen after 50hours of operation. The fittings should be securely fastened.6-4 Greasing each partCarry out the greasing up to the following grease nipples every 50 hours.1 Front roller 10 places 7 Pivot 3 places2 Rear roller 10 places 8 Piston pump 2 places3 Reel housing 5 places 9 Unload lever joint fitting 2 places4 Mower arm joint fitting 5 places 10 Pedal joint fitting 1 place5 Lift arm joint fitting 5 places 11 Pedal (under) joint fitting 1 place6 Idle lever joint fitting 1 place 12 Brake lever shaft 2 places* Refer to the following page for the grease up points of each part.