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Volvo 3TNV76 Service Information
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Volvo 3TNV76 Service Information

Volvo 3TNV76 Service Information

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Document Title:
Engine, description
Profile:
CEX, ECR28 [GB]
Engine, description
Model code (3TNV76)
Model code
Symbol
Description
3
Number of cylinders
TNV
Model series
76
Cylinder bore (mm)
The engine is a 3–cylinder, indirect injected, water cooled diesel engine.
Engine, front view
Figure 1
Engine, front view
1.
Lifting eye
2.
Cooling water pump
3.
Lifting eye
4.
Fan
5.
V-belt
6.
V-pulley
7.
Filler port (lube oil)
8.
Fuel oil inlet
9.
Drain plug (lube oil)
10.
Mechanical fuel feeding pump
11.
Fuel priming lever
12.
Dipstick
13.
Oil filter
14.
Governor lever
15.
Fuel injection pump
16.
Intake manifold
17.
Fuel filter
18.
Air intake port
Function Group:
200
Information Type:
Service Information
Service Information
Date:
2014/4/14
Remarks

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Summary of Contents for Volvo 3TNV76

  • Page 1 Function Group: Information Type: Date: Engine, description Service Information 2014/4/14 Profile: CEX, ECR28 [GB] Engine, description Model code (3TNV76) Model code Symbol Description Remarks Number of cylinders Model series Cylinder bore (mm)  The engine is a 3–cylinder, indirect injected, water cooled diesel engine.
  • Page 2 Engine, rear view Figure 2 Engine, rear view Filler port (lube oil) Bonnet (rocker arm cover) Engine name plate Flywheel Starter motor Exhaust manifold Alternator...

  • Page 3: Service Information

    Service Information Document Title: Function Group: Information Type: Date: Precautions Service Information 2014/4/14 Profile: CEX, ECR28 [GB] Precautions Make preparation as follows before starting engine inspection and service.  Fix the engine on a horizontal base.  Remove the coolant hoses, fuel oil pipes, wire harness, control wires etc. connecting the driven machine and engine, and drain coolant, lubricating oil and fuel.

  • Page 4: Periodic Inspection And Maintenance Procedure

    Service Information Document Title: Function Group: Information Type: Date: Periodic inspection Service Information 2014/4/14 maintenance procedure Profile: CEX, ECR28 [GB] Periodic inspection and maintenance procedure Check before daily operation Be sure to check the following points before starting the engine every day. Visual check around engine ...
  • Page 5 3.5 (0.92) 1.6 (0.42)  Replenishing oil pan with engine oil. If the remaining engine oil level is low, fill the oil pan with the specified engine oil to the specified level through the filler port. NOTE! The oil should not be overfilled to exceed the upper limit line. Otherwise, oil may jet out from the breather or the engine may become faulty.
  • Page 6 Daily coolant level check and replenishing shall be done only at the sub-tank. Usually do not open the radiator cap to check or replenish. Figure 3 Replenishment, coolant Tighten Loosen Radiator cap NOTE! If the coolant runs short quickly or when the radiator runs short of coolant with the sub-tank level unchanged, coolant may be leaking or the air tightness may be lost.
  • Page 7 Figure 4 Dipstick gauge, oil pan and drain plug Dipstick Oil filler cap Oil filter Oil pan Drain plug  Replacing oil filter  Turn the engine oil filter counterclockwise using a filter wrench to remove it.  Clean the mounting face of the oil filter. ...
  • Page 8 Engine oil filter  Filling oil and inspection  Filling oil and inspection NOTE! Do not overfill the oil pan with engine oil. Be sure to keep the specified level between upper and lower limit on the dipstick.  Warm up the engine by running for 5 minutes while checking any oil leakage. ...
  • Page 9  If necessary, adjust the V-belt tension (deflection). To adjust the V-belt tension, loosen the set screw and move the alternator to tighten the V-belt. After replacing with a new V-belt and adjusting it, run the engine for 5 minutes and readjust the deflection to the value in the table above.
  • Page 10  Prepare a waste oil container.  Turn the drain cock valve of the fuel tank to drain (water, dirt, etc.) from the fuel tank bottom.  Drain until fuel with no water and dirt flow out. Then tighten the drain cock valve firmly. Draining of the oil/water separator Figure 9 Draining, oil/water separator...
  • Page 11 Figure 10 Bleeding, fuel system Fuel filter Fuel return hose Fuel injection pump Mechanical fuel feed pump Priming lever Air bleeding screw Fuel cock Retaining ring Joint for fuel return Inlet Outlet Close Open From oil/water separator Bleed the fuel system according to the following procedures. When there is air in the fuel system, the fuel injection pump will not be able to function.
  • Page 12  Make sure to turn off the battery switch or disconnect the negative cable (–) before inspecting the electrical system. Failure to do so could cause short-circuits and fires.  Always disconnect the (–) Negative battery cable first before disconnecting the battery cables from battery. An accidental "Short circuit"...
  • Page 13 Figure 12 Checking, electrolyte level Too low Excessive Grease Upper limit Lower limit Electrolyte level  Check the level of fluid in the battery. When the amount of fluid nears the lower limit, fill with battery fluid (available in the market) to the upper limit. If operation continues with insufficient battery fluid, the battery life is shortened, and the battery may overheat and explode.
  • Page 14 Figure 13 Measurement, battery charge Tester When checking the battery with the batter tester, connect the red clip of the tester to the battery positive (+) terminal and black clip to the battery negative (–) terminal by pinching them securely, and judge the battery charge level from the indicator position.
  • Page 15 Rubber bulb Glass tube Float Figure 16 How to read hydrometer Specific gravity and remaining battery charge Specific gravity (20 °C) Discharged quantity of electricity (%) Remaining charge (%) 1.28 1.26 1.24 1.23 Terminals Clean if corroded or soiled. Mounting bracket Repair or replace it if corroded.
  • Page 16 Figure 17 Inspection and cleaning, radiator fin Radiator fin Air blow Dust, dirt Dirt and dust adhering on the radiator fins reduce the cooling performance, causing overheating. Make it a rule to check the radiator fins daily and clean as needed. Blow off dirt and dust from fins and periphery with compressed air 2 kgf/cm2 (28 psi) or less] not to damage the fins with compressed air.
  • Page 17 The governor lever and accelerating devices (accelerating lever, pedal, etc.) of the machine unit are connected by an accelerating cable or rod. If the cable becomes stretched or the connections loosen, deviation in the position may result and make operation unsafe. Check the cable periodically and adjust if necessary. Do not strongly move the accelerating cable or accelerating pedal.
  • Page 18  Replace the element with new one, if the element is damaged, excessively dirty or oily.  Install the dust pan to the air cleaner case placing the TOP mark upward. NOTE! When the engine is operated in dusty conditions, clean the element more frequently. Do not run the engine with air cleaner or element removed, as this may cause foreign material to enter and damage the engine.
  • Page 19  Close the fuel filter cock.  Loosen the retaining ring and replace the fuel filter element. Take the water and trash in the cup out. When removing the fuel filter with a piece of rag to prevent the fuel oil from dropping. If you spill fuel, wipe such spillage carefully.
  • Page 20 Figure 22 Coolant, replacement Radiator cap Rubber hose Sub-tank Drain plug Full (max limit) Low (min limit) WARNING Risk of scalding and burns when the expansion tank cap (radiator cap) is opened due to high pressure in the cooling system. WARNING Before removing the radiator cap, stop the engine and let it cool down sufficiently.
  • Page 21 Figure 23 Inspection, diaphragm Diaphragm cover Rocker arm cover Intake manifold Breather baffle Baffle plate Diaphragm Center plate Spring Inspect the diaphragm assy on the rocker arm cover every 1000 hours or 2 years.  Loosen screws, and remove a diaphragm assy, and check whether oil and so on doesn’t enter between the diaphragm and the cover.
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  • Page 23 Adjusting screw Lock nut NOTE! Make the measurement while the engine is cold.  Remove the rocker cover on cylinder head.  Turn the crankshaft to bring the piston of the No.1 cylinder to its compression top dead center while watching the rocker arm motion, timing scale and the top mark position of the crankshaft pulley.
  • Page 24 Adjustment, valve clearance  Loosen the lock nut and adjusting screw, and check the valve for any inclination of valve cap, entrance of dirt or wear.  Insert a 0.15 or 0.25 mm thickness gage between the rocker arm and valve cap / valve bridge, and adjust the valve clearance.
  • Page 25 Figure 28 Exploded view, fuel injection valve Nozzle holder Pressure adjusting shim Nozzle spring Nozzle spring seat Valve stop spacer Nozzle valve Nozzle body Nozzle case nut Spray pattern inspection  After adjustment to the specified valve opening pressure, use a nozzle tester and check the spray pattern and seat oil-tightness.