Maintenance - Pump drive Hydraulic pump drive The hydraulic pump is driven by a propeller shaft connected to the front engine crankshaft pulley. This shaft should be greased weekly or every 50 operating hours. There are 3 grease nipples on the shaft - one on each universal joint and one on the centre sliding section. One end of this shaft will have to be removed to replace any of the drive belts. It is recommended, and is in fact easier, to disconnect this from the hydraulic pump end. Take care not to pull the two shaft halves apart - If you do so it must be put back together in exactly the same position to ensure it stays in balance. (Each half is marked with a series of centre punch marks to indicate correct position)   Cooling fan drive The radiator cooling fan is driven by a shaft going underneath the cab from the engine. There are two support bearings, two universal joints and 1 shaft slider which require greasing every 150 hrs (5 grease nipples in all) The shaft will have to be removed from the engine end to enable fitting of belts etc Take care not to pull the two shaft halves apart - If you do so it must be put back together in exactly the same position to ensure it stays in balance. (Each half is marked with a series of centre punch marks to indicate correct position) Cooling fan The cooling fan has a viscous coupling which does not require any maintenance. It can be removed from the end of the drive shaft to facilitate removal of the fan cowling and radiator but please note it is a left hand thread Hydraulic pump drive grease points Cooling fan drive shaft 6 Fan shaft support bearing < 32 >