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8-5.  Checking the Battery 

  CAUTION : EYE/SKIN INJURY 

 

 Wear rubber gloves and other protective wear to protect eyes, skin and 

clothing from the battery fluid which contains diluted sulfuric acid. If the 
battery fluid contacts eyes or skin, wash out immediately with a large amount 
of water. Be sure to receive medical treatment, especially if the fluid contacts 
the eyes. 

  CAUTION : EXPLOSION 

 

 Never use or recharge the battery if the fluid level is below the minimum level. 

 Do not create sparks or bring flame near the battery as it generates 

flammable gas. 

 

Check the fluid level, and add distilled water 

until it reaches the upper level when the fluid 
level is near the lower level.. 

Check the terminals for looseness and tighten 

properly. 

 

< Note > 

 It is necessary to recharge the battery when the specific gravity of the battery fluid is 1.23 or 

less. Request the authorized distributor where the generator was purchased to recharge the 
battery. 

 

  Replacing the Battery 

Remove the battery negative (-) cable. 

(Always be sure to remove the negative (-) 
side first.) 

Remove the battery hold-down clamp. 
Remove the battery positive (+) cable. 
Remove the battery. 

 

*  Install the battery by performing the above 

procedures in the reverse order. 
(First connect the positive (+) cable of the 
replaced battery.) 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper Level 

Lower Level 

 

(-) Post 

(

) Post 

Hold-Down 
Clamp 

 

Summary of Contents for DG25MK

Page 1: ...rtical Water Cooled 4 Cycle Diesel Engine DG25MK 400M R X753 007 95 1 X753801 350 1 CAUTION Do not operate the Generator or any other appliance before you have read and understood the instructions for...

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: ...18 7 Load Connections 19 7 1 Load Cable Selection 19 7 2 Connecting Load Cables 19 7 3 Earth Leakage Relay and Grounding 21 8 Pre Operation Inspection 22 8 1 Checking Engine Oil 22 8 2 Checking Coolan...

Page 5: ...rocuted by short circuit Be sure to test generator s insulation resistance periodically Grounding should be made after the engine is stopped Whenever the Earth leakage relay is activated you should al...

Page 6: ...unding components immediately after stopping the engine as they are still extremely hot Do not open the radiator cap immediately after stopping the engine to avoid sustaining burns from hot vapor Hot...

Page 7: ...etting output terminal connection and load power source are consistent Cable burnout can occur due to generated heat if the load current exceeds the allowable current of the cable The voltage drop bet...

Page 8: ...ed locations Order labels using part number indicated in the parenthesis Injury Part no X505 007550 Electric shock Part no X505 007560 Caution gm spec LLC Part no X505 007840 Caution fire Part no X505...

Page 9: ...d speed min 1 1500 1800 Displacement L 2 434 Combustion system Direct Fuel Injection Cooling method Radiator Lubricating method Forced lubrication Starting method Electric start Fuel Diesel Fuel ASTM...

Page 10: ...15 to 40 C Relative humidity 85 or less Elevation 300 m or less Power source for submerged pumps and similar civil engineering equipment Power source for lighting and similar equipment Power source fo...

Page 11: ...uel Return External Tank Fuel Inlet Water Separator Battery Alternator Check Door 3way Fuel Valve Air Cleaner Coolant Drain Plug Oil Drain Plug Fuel Filter Oil Filler Accessories Owners Manual Door Ke...

Page 12: ...9 Inside 4 2 Operation Panel Part Names Circuit Breaker Controller Power Switch Hour Meter Voltage Regulator Earth Leakage Relay Frequency Selector Switch inside...

Page 13: ...rms Manual Mode Button This button places the controller into its Manual Mode Refer to section 9 1 Initial Startup Pre Check 1 Manual Start Auto Mode Button This button places the controller into its...

Page 14: ...ar To exit sleep mode press any button on the controller Main screens Status Status Screen Contents Generator at Rest Engine is stopped Generator Available Engine is running Generator Locked Out It is...

Page 15: ...se Sequence No use Active Config Ph N voltage frequency voltage set in the Alt Config is displayed Mains Status Screen Contents Mains Voltage No use Mains Frequency No use Mains Phase Sequence No use...

Page 16: ...Power Switch is in the ON position It will cause injury by rotating parts such as cooling fans and fan belt Always turn the Power Switch to the OFF position and stop the engine then close and lock OP...

Page 17: ...it is insufficient Refer to section 8 2 Checking Coolant If the coolant is at the specified amount it is probable that the fan belt is loose or there is a coolant leak Wait for the engine to cool and...

Page 18: ...el Low If the amount of fuel is small Fuel Level Low appear on the Operation Display and the engine will be automatically stopped Check if there is a sufficient amount of fuel and add fuel insufficien...

Page 19: ...OPERTY DAMAGE When changing the frequency be sure to change both the Frequency Selector Switch and Controller settings Loosen the two screws to open the operation panel Change the Frequency Selector S...

Page 20: ...ernal fuel tank to the external fuel inlet and the external fuel return Change the lever of the 3way fuel valve to the B side to supply fuel from the external tank Refer to 9 5 Connecting an External...

Page 21: ...nerator set up barriers or fencing completely around the boundary line of the construction area and take measures to prevent persons not involved in the construction from entering the area Position th...

Page 22: ...Tables Ex If used voltage is 440V and voltage drops by 22 V 3 phase Cabtyre cables Unit AWG Length 30 m or less 61 m 91 m 122 m 152 m 183 m Current 20 A 12 12 12 12 12 12 25 A 12 12 12 12 12 10 30 A...

Page 23: ...burnout 1 3 Phase Output Terminal For 3 phase load Terminal voltage is 400 440 V 200 220 V 50 60Hz The values in brackets are for when set to 200 220V For 1 phase load Terminal voltage is 230 254 V 1...

Page 24: ...ctrician should perform the grounding of the following 3 points 500 or below The Bonnet grounding terminal of the generator The Earth leakage terminal of the generator The Bonnet of the load Note In t...

Page 25: ...OPERATION PANEL DOOR before checking or maintaining the engine or any equipment Do not open the check door when the Power Switch is in the ON position It will cause injury by rotating parts such as co...

Page 26: ...tank with coolant until it reaches the FULL line Re attach the cap 2 Filling the Radiator Remove the radiator plate Remove the radiator cap Fill with coolant through the filler neck until the radiato...

Page 27: ...hecking the Fuel CAUTION FIRE This generator uses diesel fuel Always be sure to stop the engine and not bring flames close when inspecting fuel or refueling Wait until the engine has cooled before per...

Page 28: ...uid level and add distilled water until it reaches the upper level when the fluid level is near the lower level Check the terminals for looseness and tighten properly Note It is necessary to recharge...

Page 29: ...emperature or humidity or an area with a large amount of dust Do not open any doors during operation Operating with door open can negatively affect cooling effect resulting in an equipment malfunction...

Page 30: ...perature not less than 30 degrees Pre heating time depends on the coolant temperature Automatically repeats Crank Attempt and Crank Rest up to 3 times Please keep in mind that the muffler may emit som...

Page 31: ...al 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 sli...

Page 32: ...for a prolonged period If you leave the Power Switch in the OFF position the standby current may drain the battery 9 4 Protective Functions WARNING INJURY Do not open the check door when the Power Swi...

Page 33: ...efault 115 C 3 Air Filter Clogging The element is clogged making it necessary to clean or replace the element 4 Overload Activates in overload Flashes when at approx 80 of rated output Load rejection...

Page 34: ...hose with an internal diameter of 8 to 9 mm Set the fuel level of the external fuel tank from 0 to 3 m from the underside of this generator The fuel level of the external fuel tank being lower than th...

Page 35: ...e enough to prevent the fluid from spilling on the ground Dispose of oil fuel coolant LLC filter battery and other hazardous materials according to laws and regulations concerning industrial waste Con...

Page 36: ...arator and Gauze filter Clean Fuel tank Clean Check for leaks Fuel Oil Coolant Fuel Cooling Water Oil Hoses and Anti Vibration Rubber Replace Every 2 years Air cleaner element Clean 1st time at 50hrs...

Page 37: ...ain plug and shortly after starting the engine be sure to always check that there is no oil leakage 2 Replacing the Oil Filter First Time 50 hours Thereafter Every 200 hours Drain the engine oil Refer...

Page 38: ...except cleaning Element part no 1401 42271 Kubota part no Cleaning the air filter element If dry dust is adhering Blow compressed air from inside the element If carbon or oil is adhering Replace with...

Page 39: ...rain Water Every 200 hours Remove the fuel drain plug and packing with rubber seal After the water has been drained reinsert the fuel drain plug with new packing with rubber seal Note Replace the pack...

Page 40: ...by extensive light load WARNING EXHAUST GAS POISONING Do not operate the generator in poorly ventilated areas such as an indoors or tunnels as the exhaust gas of the engine contains substances that ar...

Page 41: ...age Procedures Perform the following maintenance procedures before storing this generator if it is not going to be used for two months or more Remove the battery Refer to section 8 7 Checking the Batt...

Page 42: ...tor when it is double stacked WARNING ELECTRIC SHOCK INJURY Do not touch output terminals or internal electric parts while the generator is operating Do not open the check door when the Power Switch i...

Page 43: ...line is frozen 3 Pre heater is defective 1 Use winterized fuel 2 Drain water in fuel line 3 Ask our distributor to repair Engine starts but stalls immediately 1 Fuel filter is clogged 2 Gauze filter i...

Page 44: ...tive 2 AVR is defective 3 Improper load cable connection 1 Ask our distributor to repair 2 Ask our distributor to repair 3 Correctly set the connection location to the output terminal The voltage drop...

Page 45: ...42 1 400 440V 13 Generator Circuit Diagram...

Page 46: ...43 2 200 220V...

Page 47: ...44 14 Engine Electrical Circuit Diagram...

Page 48: ...2019...

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