6 Fuel system Servicing and maintenance works z Bring engine control to stop position. z Position fuel collecting vessel below the con- stant-pressure valve in the crankcase/filter hous- ing. z Open constant-pressure valve in the crankcase/ fuel stopcock in the filter housing. z Turn over the engine with starter (max. 20 Sec.) until bubble-free fuel emerges at the constant- pressure valve in the crankcase/filter housing. z Screw in ventilation screws (tightening torque 25-5 Nm) and constant-pressure valve. z Bring engine control to the start position and start. z Check for leaks after starting the engine. © 2009 45 bubbles. z Catch any escaping fuel. z Tighten vent screw.
Vent the fuel system z Shut off the fuel supply to the engine (with high- level tank). z Place a vessel under the drain plug. z Open the drain cock and drain liquid. z Unscrew the filter insert (2) together with the wa- ter collection vessel (3). z Unscrew the water collection vessel (3) from the filter insert (2). The special tool can be ordered under part number 8192 ( 76 ). z Clean the water collection vessel (3) and all the existing sealing surfaces (6) with a brush and diesel fuel. z Oil the gaskets and sealing surfaces (6) of the new DEUTZ original filter insert (2) lightly or wet with diesel fuel. z Screw the water collection vessel (3) to the filter insert (2).
z Screw a new filter insert (2) with water collection vessel (3) onto the filter carrier 1) (tightening torque 17-18 Nm) z Open the fuel supply to the engine. z Vent the fuel system. with fuel. z Assembly in clockwise direction. z Open the fuel shutoff tap and vent the system, see venting the fuel system. z Start engine. z Check for leaks after starting the engine. z Loosen vent screws slightly. z Operate the pump until fuel emerges without Change the fuel pre-filter insert Vent the fuel pre-filter. z Shut off the fuel supply to the engine (with high- level tank). z Place a vessel under the drain plug. z Open the drain cock and drain liquid.
z Unscrew the filter insert (2) together with the wa- ter collection vessel (3). z Empty emulsion in the water collection vessel (3) and clean the vessel. z Mount the filter insert (2) and water collection vessel (3). Wet the sealing surfaces (6) of the fil- ter insert (2) and the water collection vessel (3) 7 1 2 3 Clean/change/vent the fuel pre-filter 1 Fuel pre-filter holder 2 Fuel filter insert 3 Water collection vessel 4 Water drain tap 5 Fuel pump 6 Sealing surface 7 Venting screw 5 6 4