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 Please be careful about a strong wind and the opening and shutting of the door at the sloping 

place enough. A door is open suddenly and is closed, and a finger might be sandwiched. 

 

Turn the main breaker on   
the operation panel to OFF. 

 
Turn the Throttle switch to IDLING. 

 
Turn the Battery Isolator to ON position 

 
Turn the Starter switch to PREHEAT. 

 
When the pre-heating indicator changes 
from lit up to off, immediately change   
the switch to START and start the engine. 
 

< Note > 

 Pre-heating time depends on the coolant temperature, and completes in approximately   

    3 to 10 sec. 

 Do not continuously operate the starter motor for 10 sec. or more.   

 If repeating starter switch operation, wait 30 sec. or more between re-starting. 

 Be aware that smoke might be generated when the engine is started. 

 

After starting the engine, remove your hand from the starter switch. 

 
Let engine idles for approximately for five minutes. 

 
Turn the Throttle switch to RUN. 

 
Adjust the voltage regulator dial to the specified voltage. 

 
Turn the breaker to ON to start AC power delivery. 
 

9-2.  Procedures during Operation 

(1)  Checks after Startup 

 Make sure that all meters and indicators are in normal status. (Refer to section “

5. Equipment

”.) 

 Check that there is no abnormal vibration or noise. 

 Check that the exhaust gas color is normal. When operation is normal, the exhaust gas should be 

colorless or slightly bluish. 

 

< Note > 

 If abnormal, stop using this generator and request authorized distributor where the generator was 

purchased to repair the generator. 

 

(2)  Adjustment during Operation 

    During load operation, check the voltmeter and finely adjust voltage using the voltage     
    regulator dial. 

 

  Bleeding air from the fuel system when the engine stops due to running out of fuel 

This generator is equipped with an automatic air bleeding mechanism. Perform the 
following procedures when the engine stops due to running out of fuel to easily bleed 
the air from the system. 

 

Add fuel to the generator. 

 
Turn the starter switch to RUN. Air bleeding is completed approximately in 30 sec. 

 

 

 

 

 

 

 

 

 

10 

 

 

 

 

 

Throttle Switch 

Starter 
Switch 

MainBreaker 

Pre-Heating

Indicator 

Battery isolator

Summary of Contents for DG20MK-P

Page 1: ...Vertical Water Cooled 4 Cycle Diesel Engine DG20MK P X750 025 61 2 X750801 470 2 CAUTION Do not operate the Generator or any other appliance before you have read and understood the instructions for us...

Page 2: ......

Page 3: ...ration Store this manual in a specified location where it will be secure and available for consulting at any time Order another copy from the authorized distributor where this generator was purchased...

Page 4: ...ion 16 7 2 Connecting Load Cables 17 7 3 Earth Leakage Relay and Grounding 17 8 Pre Operation Inspection 19 8 1 Checking Engine Oil 19 8 2 Checking Coolant 20 8 3 Checking the Fan Belt 21 8 4 Checking...

Page 5: ...the body Even though all the earth terminals of the loads have been grounded to the earth the bonnet grounding terminal should be grounded to the earth There is always a danger of being electrocuted b...

Page 6: ...ny spilled fuel or oil Allow the generator to cool before covering with the protective cover Never allow flame to come close to the generator CAUTION BURNS Do not touch the engine and surrounding comp...

Page 7: ...or thin resulting in decreased input voltage to equipment using the generator thereby causing decreased performance faulty operation and malfunction Warning Caution Label Locations If warning or cauti...

Page 8: ...el Manufacturer V2403 K3A KUBOTA No of Cylinders bore x stroke mm 4 87 X 102 4 Continuous rated output kW 19 1 PS 26 0 Rated speed min 1 1500 Displacement L 2 434 Combustion system Direct Fuel Injecti...

Page 9: ...Ambient temperature 15 to 40 degree Celsius Relative humidity 80 or less Elevation 300 m or less 3 Applications Power source for submerged pumps and similar civil engineering equipment Power source f...

Page 10: ...ter External Tank Fuel Return External Tank Fuel Inlet Water Separator Fuel Filter Battery Alternator Check Door Tie Down Radiator Plate Radiator Shown with side plate removed 3way fuel valve Air Clea...

Page 11: ...ter Starter Switch Ammeter Voltmeter Selector Switch Frequency Meter Ammeter Selector Switch Water Temperature Gauge Voltage Regulator Fuel Gauge Throttle Switch Hour Meter Panel Light Switch Pilot La...

Page 12: ...9 3 Phase ELCB 1 Phase ELCB 1 Phase Receptacle 15A 3 Phase Receptacle 20A 3 Phase Breaker 20A 1 Phase Breaker 15A 4 3 Output Panel...

Page 13: ...TEMP and ENGINE warning indicators light up and the engine automatically stops If this occurs hot steam will gush out of the coolant sub tank Check the coolant sub tank coolant level after the generat...

Page 14: ...r Low Battery Voltage The BATTERY warning indicator lights up when charging is not possible during operation If charging is not possible and the battery voltage drops below 8 V the ENGINE warning indi...

Page 15: ...ers and Gauges 1 Voltmeter Voltmeter displays the output voltage Phase to Phase from the generator Please check and confirm it showing 415V at 50Hz during operation 2 Ammeter Ammeter displays the outp...

Page 16: ...This button is used to stop the engine in emergency By inserting the button the engine stops Be sure to restore the starter switch to STOP and re set the button turning clockwise after using the emerg...

Page 17: ...turning the dial counter clockwise an operator can decrease the voltage 2 Throttle Switch The switch is to change engine speed revolution Turn the switch to IDLING when engine start warm up or cool d...

Page 18: ...ling No persons should be under a lifted generator CAUTION INJURY Always be sure to use lifting hooks when lifting up the generator and raise it slowly at a completely vertical angle Personnel perform...

Page 19: ...heck doors are accessible for internal inspection maintenance Note This equipment must be operated on hard and flat surface Operating under any other conditions may result in malfunctions Do not block...

Page 20: ...and 3 Phase output simultaneously 7 3 Earth Leakage Relay and Grounding WARNING ELECTRIC SHOCK Ground the every grounding terminal to the earth as set in the manual If even one of all is unconnected b...

Page 21: ...hat the breaker and the switches of loads are positioned to OFF Ensure that the circuit breaker positioned to OFF Refer to 4 2 Operation Panel and 4 3 Output Panel Following the procedure in 9 1 Initi...

Page 22: ...iately after stopping the equipment while temperature can reach extremely high CAUTION FIRE Always be sure to wipe up any spilled fuel or oil 8 1 Checking Engine Oil To check the engine oil keep the e...

Page 23: ...Radiator Remove the radiator plate Remove the radiator cap Fill with coolant through the filler neck until the radiator is full Re attach and tighten the radiator cap Attach the radiator plate Note Be...

Page 24: ...se or damaged fan belt could result in overheating or insufficient charging Do not operate the generator if fan guard has been removed 8 4 Checking the Fuel CAUTION FIRE This generator uses diesel fue...

Page 25: ...from fuel piping connections and similar locations 8 7 Checking the Battery CAUTION EYE SKIN INJURY Wear rubber gloves and other protective wear to protect eyes skin and clothing from the battery flui...

Page 26: ...tion CAUTION FIRE Do not bring flammable items such as fuel gas and paint or items that are highly combustible near the generator as the muffler exhaust gas and other parts become extremely hot Positi...

Page 27: ...al to the specified voltage Turn the breaker to ON to start AC power delivery 9 2 Procedures during Operation 1 Checks after Startup Make sure that all meters and indicators are in normal status Refer...

Page 28: ...ve Functions WARNING INJURY Do not open the check door during operation Be careful of pinching or catching of moving parts such as the cooling fan and fan belt Always be sure to stop the engine and re...

Page 29: ...lways make sure that the engine is stopped when working on piping Always be sure to wipe up any spilled fuel After working on the piping check that there is no fuel leakage Turn the 3way fuel valve le...

Page 30: ...s while the generator is operating Do not open the check door during operation Be careful of pinching or catching of moving parts such as the cooling fan and fan belt Always be sure to stop the engine...

Page 31: ...ose to the generator Close all doors and covers if you are going to be away from this generator Please be careful about a strong wind and the opening and shutting of the door at the sloping place enou...

Page 32: ...nd drain the engine oil After the oil has been drained close the oil drain faucet and reinsert the oil drain plug with new packing a rubber seal is attached Add oil through the oil filler until it is...

Page 33: ...ours Replace Every 400 hours Remove the air cleaner clips and cleaner cap Remove the element Clean or replace the element Replace by performing the above procedures in reverse order Note Always be sur...

Page 34: ...thin layer of oil on a new fuel filter gasket Thread the fuel filter by hand and turn by hand do not use a filter wrench from when the gasket contacts the seal surface until it is securely tightened...

Page 35: ...Flushing Liquid in Spill Containment Check Daily Set a container to collect liquid from the flushing port of the drain valve on the front of this generator Remove the drain valve plug R 1 2 and open...

Page 36: ...ed using a spanner or similar tool Prepare a container to receive the fuel remaining in the fuel piping that will flow out of the removed fuel piping Lift the generator separate the spill containment...

Page 37: ...al tape Note If the fluid drained when cleaning the spill containment contains oil or grease dispose of it according to the related laws and regulations If the spill containment has a leak contact the...

Page 38: ...from walls or other hindrances and on a level surface CAUTION INJURY Do not operate the generator if it has been modified or any parts have been removed Position the generator on a level stable surfac...

Page 39: ...lacing the Battery Replace the engine oil Refer to section 10 Inspection Maintenance 1 Engine Oil Replacement Drain the fuel from the fuel tank and filter Refer to section 10 Inspection Maintenance 5...

Page 40: ...ate the generator when it is double stacked 12 Troubleshooting WARNING ELECTRIC SHOCK INJURY Do not touch output terminals or internal electric parts while the generator is operating Close all doors a...

Page 41: ...lter 4 Drain water in water separator fuel filter or fuel tank 5 Extract the air 6 Check piping connection 7 Check lever 3 way valve 8 1 Check Change fuse 8 2 Check Change fuel cut Ambient temperature...

Page 42: ...e 3 Disconnected circuit loose terminal or departed 4 Initial exciter is defective 5 Alternator is defective 6 AVR protective device operation 1 Ask our distributor to repair 2 Ask our distributor to...

Page 43: ...40 13 Generator Circuit Diagram...

Page 44: ...41 14 Engine Electrical Circuit Diagram...

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Page 48: ...2016...

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