4 cylinders + 6 cylinders 4 cylinders + 6 cylinders - Steyr Motors

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03 FUEL SYSTEM SERVICE MANUAL MARINE ENGINES 03.14 FUEL SYSTEM CHECK 03.14.01 Manual injection test methode Preparation: Remove camshaft housing cover, refer to 01.00.02 1 1 Remove plug screw (ill.1/pos.1) with sealing ring. 14.01 ill.1 2 Mount special tool No. VR00148/0 (ill.2/pos.1) together with sealing ring (ill.2/pos.2). 2 1 14.01 ill.2 3 Move control rack by means of special tool No. VR00148/0 into idle injection position (approx.5-6 mm) (ill.3) and remain in this position. 14.01 ill.3 Page FUEL SYSTEM - 34 Z001019/0_7_July 2012
SERVICE MANUAL MARINE ENGINES 03 FUEL SYSTEM 4 Put unit injector withdrawing lever No. VR00126/0 onto rocker arm of individual unit injectors (ill. 4) and move upper end of lever in direction of air intake manifold. As a result, unit injector is pressed down and injection process is simulated. NOTE: When moving the unit injectors, a creaky noise is to be heard during the injection process and/or a solide resistance is to be felt due to produced injection pressure (pressure point) . If no difference is detectable in the individual unit injectors, continue with item 5. 5 Adjust control rack by means of special tool No. VR00148/0 to partial load (approx. 10-12 mm in direction full delivery) (ill.3) and remain in this position. 6 Repeat item 4. NOTE: 14.01 ill.4 Defective unit injectors which fail to produce a creaky noise in one or none of the two checks and/or where no resistance (pressure point) can be felt are to be exchanged. (Exchange unit injector, refer to 03.02.02). 7 Assembly is done in reverse order. ATTENTION: Absolutely remove special tool No. VR 00148/0. Use new sealing ring. Manual check of unit injector without tool No. VR 00148/0 Fuel System Check: 1. Investigate condition of return fuel. There should be neither air bubbles nor discoloration (gray) in the fuel. 2. Check proper flow quantity (i.e. engine at idle - flow rate after engine block 180 to 240 l/hr; 47 to 63 gal.) Injector Check: To feel the injection activities, move the control rack (quantity delivery) in between its acceptable travel (5 to 14mm) while depressing the „plunger“ with the rocker arm. For safe and easier handling, use our special tool lever. While moving the rocker arm (and/or the plunger up and down), try to get the control rack into idle delivery position (approx. 4-5 mm). In this spot you will feel only a very slight/short pressure build up as the duration of injection is very short (~ 5mm³/stroke). Keep this position on the control rack (freeze there) and then move over with tool VR 00126/0 to the next unit injector/rocker arm to repeat the plunge movement and feel the resistance during injection. The test should give an equal pressure load/peak on each injector, while maintaining the same position on the control rack. If one injector fails to show any pressure or this pressure peak is found in a much higher position of the control rack, this is an indication for a possible deficiency on this injector. ATTENTION: before removing this unit injector from the engine, check for proper adjustment of the linking lever and for correct fit/tightness and/or torque of the unit injector mounting nuts. Z001019/0_7_July 2012 Page FUEL SYSTEM - 35
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STEYR MARINE ENGINES 4 CYLINDERS +
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PREFACE STEYR MOTORS GmbH has devel
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TABLE OF CONTENTS (MAIN ASSEMBLY GR
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05 Cooling system 05.01 Cooler, hea
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4 cylinders + 6 cylinders 4 cylinders + 6 cylinders - Steyr Motors

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