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Volvo Penta TAD741GE Engine

The Volvo Penta TAD741GE is a 7.28 L 6-cylinder turbocharged engine rated at 1800 rpm. It powers generator sets from MQ Power, including the DCA-220SSV and DCA-220SSVU.

Also known as: Volvo Penta TAD741GE

7.28 L
Displacement
6
Cylinders
1800 rpm
Rated speed

Engine specifications

Displacement7.28 L
Cylinders6
Aspirationturbocharged
Rated speed1800 rpm

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter—
Fuel filter—
Coolant—
Oil—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

13
ItemActionHoursMonthsNotes
Fuel strainerClean200 hr1 moClean if contains dust or water; check every 200 hours of operation or once a month
Air filterClean250 hrRemove air cleaner element and clean heavy duty paper element with light spray of compressed air; replace as needed
Engine oil and filterReplace250 hrReplace engine oil filter and oil at 100 hours first time only
Fuel filter/water separatorCheck250 hr
Coolant protection level and radiatorCheck500 hrAdd Supplemental Coolant Additive (SCA's) to recharge engine coolant
Fuel filterChange500 hrReplace fuel filter cartridge with new one every 500 hours or so
Unit (inside and outside)Clean500 hr
Fuel tankInspect1000 hrInspect and clean
Hoses and clampsCheck1000 hrIf hoses need replacing, ensure slope of hose is at least 1/2 inch per foot
Insulation resistance (generator)Test1000 hrMeasure insulation resistance; over 3 Mohms
Rear rotor support bearingCheck1000 hr
GFCI receptaclesTest1 moBoth receptacles should be tested at least once a month using the Test button
Trailer brakesInspectFirst service — Inspect first 200 miles of operation, then every 3,000 miles; more frequently on rough terrain

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

33
TypeItemValueUnitCondition
ClearanceFan belt deflection10 to 15mmdepressed with thumb
ClearanceFan belt tension (deflection)10 to 15mmdepressed with thumb
OtherAntifreeze mixing ratioless than 50%
OtherBattery electrolyte specific gravity1.28specific gravityat 68°F (charged); 1.245 or lower indicates dead battery
OtherBattery specific gravity, dead (recharge or replace)1.245 or lowerat 68 deg F
OtherBattery specific gravity, sufficiently charged1.28at 68 deg F
OtherEngine air bleeding after running out of fuel15-30secondsswitch in ON position
OtherEngine cool-down before shutdown3-5minuteslow speed, no load applied
OtherEngine oil filter and oil replacement, first time only100hoursfirst service
OtherGlow plug pre-heat time (cold weather)at least 50secondscold weather conditions
OtherGovernor frequency variation±.25%electric governor regulation
OtherMain circuit breaker rating600amp3-pole; protects U, V, W output terminal lugs
OtherTrailer brake inspection intervalfirst 200 miles, then every 3,000 milesmilestrailer brakes
OtherTrailer suspension inspection intervalevery 6,000milesleaf suspension springs and associated components
PressureEngine oil pressure gauge reading303~503kPanormal operation (44 to 73 psi)
PressureEngine oil pressure, normal operating303~503kPanormal operating conditions
PressureEngine oil pressure, normal operating44 to 73psinormal operating conditions
PressureLow oil pressure fault threshold15psimajor fault
PressurePrimary air filter element replacement vacuum (restriction indicator)625 mm (25 in. Hg)mmwhen restriction indicator shows this vacuum
ResistanceGenerator insulation resistanceover 3Mohmsmeasured
SpeedEngine speed for 60 Hz1800rpmrated load applied
SpeedEngine speed, normal operatingapproximately 1600RPMnormal operating conditions
TemperatureAntifreeze freezing point-37°C50% antifreeze concentration (freezing point -34°F)
TemperatureCoolant temperature, normal operating165 and 203degrees Fahrenheitgreen zone
TemperatureHigh coolant temperature fault threshold239°Fmajor fault
TemperatureWater temperature gauge reading165 to 203°Fnormal operation
TorqueTrailer shackle bolt, shoulder typeMIN 30 - MAX 50ft-lbsnug fit only; parts must rotate freely; locking nuts or cotter pins provided to retain nut-bolt assembly
TorqueTrailer suspension U-bolt, 1/2 inMIN 45 - MAX 60ft-lb
TorqueTrailer suspension U-bolt, 3/8 inMIN 30 - MAX 35ft-lb
TorqueTrailer suspension U-bolt, 7/16 inMIN 45 - MAX 60ft-lb
TorqueTrailer wheel lug nuts, 12 in and 13 in wheels20-25 (first pass), 35-40 (second pass), 50-65 (third pass)ft-lbtighten in 3 separate passes in sequence; retorque after first road use
TorqueTrailer wheel lug nuts, 14 in, 15 in and 16 in wheels20-25 (first pass), 50-60 (second pass), 90-120 (third pass)ft-lbtighten in 3 separate passes in sequence; retorque after first road use
VoltageVoltage regulator manual adjustment±15%output voltage adjustment

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
CoolantCoolant/antifreeze as recommended by the engine manufacturerAntifreeze mixing ratio must be less than 50%; add Supplemental Coolant Additive (SCA's) to recharge engine coolant; freezepoint chart: 50 vol% antifreeze = -34 C / -37 F
CoolantVOLVO antifreeze/summer coolant (concentrate mixed with 50% demineralized water, or pre-diluted)above -37°C4.8 GalEngine and radiator capacity 18 liters; antifreeze mixing ratio must be less than 50%; 50% antifreeze freezes at -34°F
Engine oilRefer to the VOLVO Engine Owner's ManualCheck crankcase oil level prior to each use or when fuel tank is filled; level must be between the two notches on the dipstick
Engine oilAPI Service Classification CC/SC, CC/SD, CC/SE, CC/SFAPI7.7 galCapacity 29 liters; drain oil while warm; do not overfill
FuelDiesel Fuel #2100.0 galInternal fuel tank located inside trailer frame (380 liters); tank must be closed tightly after filling
FuelDiesel fuel (grade may vary according to season and locations)Keep tank full with diesel fuel in cold weather to reduce water condensation; drain water/impurities from bottom of tank occasionally
OtherBattery electrolyte - add only distilled waterMaintain fluid level between specified marks; do not overfill

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

12
Trailer Brake Adjustment adjustment

⚠ Wear safety glasses when removing or installing force fitted parts.

Tools: Screwdriver or standard adjusting tool, Jack stands

  1. Place trailer on jack stands on secure level ground.
  2. Check the wheel and drum for free rotation.
  3. Remove adjusting hole cover from the adjusting slot at bottom of backing plate.
  4. Rotate the star wheel of the adjuster to expand the brake shoes.
  5. Adjust until lining pressed against drum makes wheel difficult to turn.
  6. Rotate star wheel opposite direction until wheel rotates freely with slight lining drag.
  7. Replace adjusting hole cover and lower trailer to ground; repeat on remaining brakes.
Wheel Lug Nut Tightening Sequence adjustment

⚠ NEVER use a pneumatic air gun to tighten wheel lug nuts.

Tools: Torque wrench

  1. Start all wheel lug nuts by hand.
  2. Torque all lug nuts in sequence; do not torque all the way down.
  3. Tighten each lug nut in 3 separate passes as defined by Table 18.
  4. After first road use, retorque all lug nuts in sequence.
  5. Check all wheel lug nuts periodically.
3Ø-240V UVWO Terminal Output Connection installation

⚠ Never place jumper plates on the voltage change-over board while the generator is in operation.

  1. Jumper the voltage change-over board for 240V operation.
  2. Connect the load wires to the UVWO terminals.
  3. Turn voltage regulator knob clockwise to increase, counterclockwise to decrease voltage.
3Ø-480V UVWO Terminal Output Connection installation

⚠ Never place jumper plates on the voltage change-over board while the generator is in operation.

  1. Jumper the voltage change-over board for 480V operation.
  2. Use 6 jumper plates in 3 different positions; every jumper plate must be used.
  3. Connect the load wires to the UVWO terminals.
Generator Grounding installation

⚠ Consult a licensed electrician before connecting generator to a building's electrical system.

  1. Use copper 10 AWG (5.3 mm2) or larger ground wire.
  2. Use aluminum 8 AWG (8.4 mm2) or larger ground wire.
  3. Connect ground cable between lock washer and nut on generator.
  4. Tighten nut fully and connect other end to earth ground.
  5. Bury earth ground rod minimum 8 ft into ground (NEC 250-52(c)).
Adding Coolant maintenance

⚠ Removing the radiator cap while the engine is hot will cause boiling water to gush out, causing severe scalding.

  1. Add coolant day-to-day from the recovery tank.
  2. Do not remove the radiator cap until the unit has completely cooled.
  3. Keep coolant level in recovery tank between H and L markings.
Battery Cable Installation maintenance

⚠ Incorrect battery cable connection will cause electrical damage to the generator.

  1. Place MPEC control switch in OFF/RESET position before connecting battery.
  2. Connect red cable to positive battery terminal.
  3. Connect black cable to negative battery terminal.
  4. Apply battery terminal treatment compound around both terminals.
  5. Disconnect negative terminal FIRST and reconnect negative terminal LAST.
Cleaning the Fuel Strainer maintenance
  1. Remove dust or water in the strainer cap and wash it in gasoline.
  2. Securely fasten the fuel strainer cap so fuel will not leak.
  3. Check the fuel strainer every 200 hours or once a month.
Cleaning the Radiator maintenance

⚠ Cleaning inside the machine is dangerous; clean only with engine off and negative battery terminal disconnected.

Tools: Compressed air

  1. Turn engine off and disconnect the negative battery terminal.
  2. Periodically clean radiator fins with compressed air.
Engine Oil Check and Fill maintenance

⚠ Removing the oil drain plug while the engine is hot can cause hot oil to gush out.

  1. Make sure the generator is level.
  2. Verify oil level is between the two notches on the dipstick.
  3. If oil is not clean, drain by removing the oil drain plug; oil should be warm.
  4. Refill crankcase through filler hole with specified oil; do not overfill.
Fan Belt Inspection and Tension maintenance

⚠ Never place hands near the belts or fan while the generator set is running.

  1. Inspect the fan belt for damage and wear.
  2. Adjust belt in accordance with the VOLVO Engine Owner's Manual.
  3. Belt tension is proper if it bends 10 to 15 mm when depressed with the thumb.
Flushing Out Radiator and Replacing Coolant maintenance

⚠ Allow engine to cool when flushing radiator; hot coolant can cause severe burns.

⚠ DO NOT remove radiator cap until unit has completely cooled.

  1. Open both cocks at crankcase side and lower radiator and drain coolant.
  2. Open radiator cap while draining.
  3. Remove the overflow tank and drain it.
  4. Check hoses for softening and kinks; check clamps for leakage.
  5. Flush radiator with clean tap water until rust and dirt are removed.
  6. Do not clean radiator core with objects such as a screwdriver.
  7. Tighten both cocks and replace the overflow tank.
  8. Replace with coolant recommended by engine manufacturer and close cap tightly.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

VoltagePhaseConnectionLeadsNotes
120, 127, 139, 240, 254, 2771Selectable output voltagesSingle-phase voltages available via voltage selector switch
13911Ø-139V at UVWO output terminal lugs6 jumper plates (240V configuration)
208, 220, 240, 416, 440, 4803Selectable output voltagesThree-phase voltages available via voltage selector switch
24011Ø-240V at UVWO output terminal lugs6 jumper plates (240V configuration)
24033Ø-240V at UVWO output terminal lugs6 jumper plates on voltage change-over board (240V configuration)Factory default configuration
27711Ø-277V at UVWO output terminal lugs6 jumper plates (480V configuration)
48011Ø-480V at UVWO output terminal lugs6 jumper plates (480V configuration)
48033Ø-480V at UVWO output terminal lugs6 jumper plates in 3 different positions (480V configuration)Every jumper plate must be used

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Aftermarket parts that fit this engine

9

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Common questions

What is the displacement of the Volvo Penta TAD741GE?

The Volvo Penta TAD741GE has a displacement of 7.28 liters with 6 cylinders.

Which generators use the Volvo Penta TAD741GE engine?

The Volvo Penta TAD741GE powers 2 generator set(s), including MQ Power DCA-220SSV, MQ Power DCA-220SSVU.