Volvo Penta MD7A Instruction Book
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Volvo Penta MD7A Instruction Book

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Summary of Contents for Volvo Penta MD7A

  • Page 3: Warranty Certificate

    FOREWORD Before you start your new Volvo Penta marine engine, you are advised to read through this instruction book carefully. It contains information relevant to the proper operation and maintenance of your engine. Volvo Penta has built up an extensive service organization with service shops and specially trained personnel at your service.

  • Page 5: Table Of Contents

    CONTENTS Instruments and Controls 3 - 4 General Information 5 - 6 Running Instructions Starting the engine Running instructions Shutdown procedure 8 - 11 Technical Description Checks and Service Scheme 13 – 23 Checks and Service Check daily before starting Check every 14 days 13 - 14 Service every 50 hours of operation...

  • Page 6: Instruments And Controls

    Switch, extra lighting Warning lamp, “No battery charging” Buzzer, “low oil pressure, high tempe- rature” Key switch Volvo Penta Single Control System CONTROL SYSTEM For side mounting Control lever Disengaging button Push in the button when the control lever is in neutral and move the lever a bit forwards.

  • Page 7: General Information

    If the boat is equipped with S -drive model MD7A/110S – or any other S-drive model – it is important not to use an anti-fouling paint which contains copper. See further “Service in connection...

  • Page 8: Preparations Before Starting

    GENERAL INFORMATION SAFETY EQUIPMENT Irrespective of whether the boat is being used for long cruises or short bathing trips, the boat should be equipped with the safety equipment listed below. It can, of course, be supplemented further according to personal tastes. Investigate at regular intervals to ensure that there is safety equipment on board and that it is in working order.

  • Page 9: Running Instructions

    RUNNING INSTRUCTIONS RUNNING INSTRUCTIONS START THE ENGINE Switch on the main switch. Start the engine room fan (if fitted) and let it run several minutes before starting the engine. Check that cocks for fuel and water intake are open. If water in the boat, use bilge pump and drain the boat.
  • Page 10 RUNNING INSTRUCTIONS RUNNING The single lever control contains engine speed as well as gear shifting functions. NOTE! If the boat is equipped with a folding type of propeller, the engine speed must be reduced to idling prior to shifting to “FORWARD”.
  • Page 11 RUNNING INSTRUCTIONS Folding propeller, S-drive. When switching from engine operated running to sailing the propeller rotation is stopped by engaging reverse gear. When sailing maintain the control lever in the reverse position. Fixed propeller. When sailing the control lever should be in the neutral or reverse position.

  • Page 12: Technical Description

    TECHNICAL DESCRIPTION The MD7A is a 2 cylinder, 4-stroke, marine diesel engine with direct injection and sea water cooling. ENGINE ASSEMBLY The engine block and cylinder head are made of cast iron. The engine has overhead valves. LUBRICATING SYSTEM The lubricating system has a full-flow oil filter which cleans the oil before it reaches the lubrication points.
  • Page 13 TECHNICAL DESCRIPTION FUEL SYSTEM The fuel system has a feed pump with a fine filter, fuel filter with a fine filter insert, injection pump and injectors. The feed pump is of the diaphragm type and is equipped with a hand priming lever. There is a built-in cold start device in the fuel injection pump.
  • Page 14 TECHNICAL DESCRIPTION REVERSE GEAR (MD7A/MSB) The reduction gear is integrally built with the reverse gear. The power from the engine to the reverse gear is transmitted via a rubber flange. For operating “Forward” and “Reverse” the Volvo patented cone clutch is used, which ensures smooth and quiet engagement.
  • Page 15 TECHNICAL DESCRIPTION S-DRIVE MODEL 110S (MD7A/110S) The power from the engine is transmitted via a rubber flange carrier to the S-Drive. For operating “Forward” and “Reverse” the Volvo patented cone clutch is used, which ensures smooth and quiet engagement. Very small forces are required to operate the...

  • Page 16: Checks And Service Scheme

    CHECKS AND SERVICE SCHEME Checks and service should be carried out regularly in accordance with the intervals given below. Let an authorized Volvo Penta Service Work Shop look after your engine. CHECK DAILY BEFORE STARTING that Page The oil level in the engine is between the marks on the dipstick...

  • Page 17: Checks And Service

    CHECKS AND SERVICE CHECK DAILY BEFORE STARTING OIL LEVEL IN ENGINE Each day before starting check that the oil level is between the marks on the dipstick. Top up with oil if necessary through the oil filler hole. NOTE. Do not top up above the MAX.

  • Page 18: Check Every 14 Days That

    CHECKS AND SERVICE OIL LEVEL IN THE S-DRIVE Check every 14 days that the oil level is within the marks on the dipstick. The oil dipstick is provided with a bayo- net type of attachment. Therefore it has to be turned prior to removal and re- insertion.

  • Page 19: Service Every 50 Hours Of Operation

    CHECKS AND SERVICE SERVICE EVERY 50 HOURS OF OPERATION: OIL CHANGE IN ENGINE With a new or newly reconditioned engine, the oil should be changed for the first time after 20 hours of operation and after that after every 50 hours of operation. Run the engine warm.

  • Page 20: Change The Lubrication Oil In The S-Drive Model 110S

    NOTE! Do not fill oil above the upper oil dipstick mark. Concerning the choice of oil, see “Technical Data”, Page 30. VALVE CLEARANCE Checking adjusting valve clearance should be done by an authorized Volvo penta Service Workshop. See further under “Valves - Technical Data”.

  • Page 21: Change The Oil Filter

    CHECKS AND SERVICE SERVICE EVERY 100 HOURS OF OPERATION OR AT LEAST ONCE EACH SEASON OIL FILTER The oil filter should be replaced for the first time after 20 hours of operation during the running in period and subsequently at every other oil change. Unscrew and discard the oil filter.

  • Page 22: Checking And Changing The Alternator V-Belt

    CHECKS AND SERVICE CHECKING AND REPLACING THE V-BELT Check the belt carefully, both for wear and cracks. Any sign of such and the belt must be replaced. Loosen the alternator mounting bolts so that the belt can be removed. Clean the pulley grooves before fitting the new belt.

  • Page 23: Check The Cooling System

    CHECKS AND SERVICE CHECK THE COOLING SYSTEM The cooling system is functioning normally when the temperature warning lamp is out and the buzzer is silent. Too high water temperature (the warning lamp is on and the buzzer is sounding) can be due to the following reasons: Blocked water intake, defective impeller or defective sea water pump carrier, faulty thermostat or temperature sender.

  • Page 24: Electrical System. Checking And Changing Fuses

    CHECKS AND SERVICE Alternator ELECTRICAL SYSTEM The engine is equipped with an alternator. To ensure that the alternator, with the built- on regulator, functions without interruptions following important points must observed: The main switch must never be switched off until the engine has stopped.

  • Page 25: Check The Fuel System, Filter, Strainer, Injector, Injection Pump, Venting

    CHECKS AND SERVICE Changing the Fuse A fusebox is mounted on the engine. The fuse breaks the electrical system when overloaded. Re-connect the electrical system by transferring the cable connection to the next fuse contact. Starter motor and alternator All work connected with the starter motor and alternator should be done by an authorized service workshop.
  • Page 26 Injectors All work on the engine injectors shall be carried out by an authorized Volvo Penta Service Workshop. Each third season the injectors should be handed over a diesel workshop for cleaning and checking the opening pressure, leakage and spray pattern.

  • Page 27: Venting The Fuel System

    CHECKS AND SERVICE Venting the fuel system Venting of the fuel system must be carried out prior to the first start of the engine and after work has been carried out on the fuel system, when the fuel tank has been run empty or if the engine has been out of operation for some time.

  • Page 28: Inhibiting Scheme

    Inhibiting for the winter lay-up Prior to inhibiting the engine for the winter lay-up, an authorized Volvo Penta Service Workshop should test the engine and equipment. It is advisable to check the compression in order find out the condition of the engine.
  • Page 29 S-Drive respectively. Change the oil filter. Fill up the engine, reverse gear and S- Drive respectively to the correct level. Use the Volvo Penta diesel engine oil with protective properties against corrosion. Now the engine is ready to run on this oil during the coming seas on.
  • Page 30 Install the cover using a new, genuine gasket. Install the cooling water hose between the cooling water intake and reverse gear and the water pump (MD7A/110S) respectively. Close all draining cocks. If a vacuum -valve is installed, it has to be disassembled and salt-sediments cleaned away.

  • Page 31: Service In Connection With Launching

    LAYING-UP AND LAUNCHING SERVICE IN CONNECTION WITH LAUNCHING If Volvo Penta diesel engine oil has been used, you only need to check the oil level in the engine and reverse gear and S - Drive. If preservative oil has been used, both oil and filter must be replaced.
  • Page 32 Check that all functions for maneuvering are working properly. When necessary contact an authorized Volvo Penta Workshop and have their specialist make the service on engine and reverse gear or S-Drive in accordance with recommendations in...

  • Page 33: Fault Tracing Scheme

    With the help of the instructions given in this handbook, the owner can generally remedy most of the faults l i sted below. When in doubt, always contact the nearest Volvo Penta workshop. Follow the maintenance scheme’s recommendations – it helps provide trouble-free operation.

  • Page 34: Technical Data

    — Oil quality (same as for the engine) Diesel Lubricating Oil Viscosity See under engine above! 1) Propeller shaft output to DIN Leusting B f&r Dauerbetrieb 2) Volvo Penta CD oil, Double grade. 3) Volvo Penta CD oil, Single grade.
  • Page 35 TECHNICAL DATA S-Drive Model 110S Ratio 1,66:1 Oil quantity, dm (Imp qts — US qts) 2,3 (2,0—2,4) Oil quality (same as for the engine) Diesel Lubricating Oil Viscosity SAE2OW/30 Cooling System Thermostat opens at °C/°F 60/140 fully open °C/°F 75/167 Fuel System Injection pump, make CAV (model DPA)

  • Page 36: Wiring Diagram

    WIRING DIAGRAM Cable Colour Code Marking Colour A.W.G. White Black B’ Black B” Black 0.75 C’ C” Yellow Brown H’ Blue Green/Red I’ Green/Red 0.75 Green J’ Green J” Green 0.75 Blue/Yellow 0.75 White/Red 0.75 Blue/Red 0.75 Place for instruments, opt. equipment) List of Components Plug in connector, wire harness Switch, extra lighting...
  • Page 37 ENGINE COMPONENT GUIDES MD7A with reverse gear model MSB Oil dipstick and oil filler hole hole and oil scavenging reverse gear Cover, cooling water pump Venting screw, fine-filter Fine-filter Decompression lever Fuel pressure line nut Sender, temp gauge Injector Thermostat housing 10.
  • Page 38 ENGINE COMPONENT GUIDES MD7A / 110S 21. Oil drainage, reverse and reduction gear 22. Oil filter 23. Sender, low oil pressure 24. Control cable bracket 25. Shift lever 26. Water cooled exhaust elbow 27. Sea water pump 28. Fuel injection pump 29.
  • Page 39 INDEX, ALPHABETICAL ORDER Alternator 20, 21 Launching Lubricating oil Battery 14, 20 Lubricating system Belt tension 14, 18 Main Switch 5, 20 Charging regulator 7, 20 Checks & Service Oil changing 15, 16 Scheme Oil dipstick, rev gear Controls engine Cooling system 9, 19 S-Drive...

  • Page 41: Important Information

    Bear in mind the risk of a fire. All engine fuel is potentially inflammable. Let an expert correct any faults in the fuel system and always use genuine Volvo Penta spare parts.

This manual is also suitable for:

Md7a/110s

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