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Hobart 60PL20 Operation And Maintenance Manual

Engine-driven generator set for truck or trailer mounting
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OPERATION AND MAINTENANCE MANUAL
ENGINE-DRIVEN GENERATOR SET
SPECIFICATION NUMBER 7009 , 7009A, & 7009B
60-KVA, 400-HZ, 115/200-V AC, 3-PHASE
with
ILLUSTRATED PARTS LIST
for
For Truck or Trailer Mounting
MODEL No. 60PL20
with
PERKINS DIESEL ENGINE
TYPE 6.3544
Hobart Brothers Company
Airport Systems Group
Ground Power Equipment
Troy, Ohio 45373
U.S.A.
OM-2053
032089
Revised 050693
Revised 050994

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  • Page 1 OPERATION AND MAINTENANCE MANUAL with ILLUSTRATED PARTS LIST ENGINE-DRIVEN GENERATOR SET SPECIFICATION NUMBER 7009 , 7009A, & 7009B For Truck or Trailer Mounting MODEL No. 60PL20 60-KVA, 400-HZ, 115/200-V AC, 3-PHASE with PERKINS DIESEL ENGINE TYPE 6.3544 Hobart Brothers Company...
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  • Page 3 OM-2053 SAFETY INSTRUCTIONS AND WARNINGS FOR ELECTRICAL POWER EQUIPMENT WARNING ELECTRIC SHOCK can KILL. Do not touch live electrical parts. ELECTRIC ARC FLASH can injure eyes, burn skin, cause equipment damage, and ignite combustible material. DO NOT use power cables to break load and prevent tools from causing short circuits. IMPROPER PHASE CONNECTION, PARALLELING, OR USE can damage this and attached equipment.
  • Page 4 OM-2053 c. Disconnect power to equipment if it is out of service. d. If troubleshooting must be done with the unit energized, have another person present who is trained in turning off the equipment and providing or calling for first aid. C .
  • Page 5 This manual contains operation and maintenance information for a 400-Hertz generator set manufactured by Hobart Brothers Company, Power Systems Group, Troy, Ohio 45373. This manual is not intended to be a textbook on electricity or electronics. Its primary purpose is to provide information and instructions to experienced operators, electricians, and mechanics who have never seen or operated this equipment.
  • Page 6 OM-2053 This page intentionally left blank. Introduction December 31/91 Revised Page 2...
  • Page 7 OM-2053 LIST OF EFFECTIVE PAGES CHAPTER/ CHAPTER/ SECTION PAGE DATE SECTION PAGE DATE List of Mar 20/89 Mar 20/89 Effective Mar 20/89 Mar 20/89 Pages Mar 20/89 Mar 20/89 Introduction Mar 20/89 Mar 20/89 Introduction Mar 20/89 Mar 20/89 Contents Mar 20/89 Mar 20/89 Contents...
  • Page 8 OM-2053 LIST OF EFFECTIVE PAGES CHAPTER/ CHAPTER/ SECTION PAGE DATE SECTION PAGE DATE Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89 Mar 20/89...

  • Page 9: Table Of Contents

    C. Electric Governor 4. Canopy 5. Optional Equipment 6. Engine, Generator, and Controls Assembly A. Basic Engine B. Engine Manufacturer’s Equipment C.Hobart Engine Equipment (1) Electric governor system (a) Magnetic pickup (b) Control unit (c) Actuator (2) Engine electrical system...
  • Page 10 OM-2053 Table of Contents SUBJECT CHAPTER/SECTION PAGE (k) Solid-state voltage regulator (l) Overload module (m) Rectifier F. Engine Control Panel (1) Engine instruments (a) Ammeter (b) Temperature gage (c) Oil pressure gage and oil pressure switch (d) Hourmeter (e) Fuel gage and blocking diodes (2) Engine and generator controls (a) Engine-generator control switch (b) Contactor control switch...
  • Page 11 OM-2053 Table of Contents SUBJECT CHAPTER/SECTION PAGE 3. Trailer Operation A. Towing B. Parking Chapter 2. Service Section 1. Maintenance 1. General 2. Inspection 3. Lubrication A. General B. Generator C. Generator Controls D. Engine (1) Lubrication schedule (2) Oil specification (3) Oil viscosity (4) Changing engine oil (5) Changing engine oil filter...
  • Page 12 OM-2053 Table of Contents SUBJECT CHAPTER/SECTION PAGE 7. Generator Maintenance A. Cleaning B. Adjustment 8. Drive Belts A. Checking Belt Tension B. Belt Adjustment 9. Battery Maintenance A. General B. Battery Location and Accessibility C. Battery Care D. Liquid Level E.
  • Page 13 OM-2053 Table of Contents SUBJECT CHAPTER/SECTION PAGE Section 3. Adjustment/Test 1. General 2. Generator Set Test A. Pre-operational Test Procedures B. Operational Test Procedures 3. Generator Set Adjustment A. Generator Adjustment B. Voltage Regulator Adjustments C.Basic Engine Adjustments D. Engine Accessories Adjustment (1) Generator and fan belt adjustment E.
  • Page 14 3. Arrangement 4. Explanation of Parts List A. Contents B. Parts List Form (1) FIGURE-ITEM NO. Column (2) HOBART PART NUMBER Column (3) NOMENCLATURE Column (4) REC. SPARES Column (5) “EFF” (Effective) Column (6) UNITS PER ASSEMBLY Column Section 2. Manufacturer’s Codes 1.

  • Page 15: Chapter 1. Description/Operation

    CHAPTER 1. DESCRIPTION/OPERATION SECTION 1. DESCRIPTION 1. General This manual covers two trailer-mounted 60-kVA generator sets manufactured by Hobart Brothers Com- pany and identified respectively as Specification No. 7009-1, Specification No. 7009A-1, and Specifi- cation No. 7009B-1 All three generator sets feature an armature with Hoover Bearings, Browning Coupler, and different mag- netic pole construction for the generator revolving field.
  • Page 16 OM-2053 1. Engine fan exhaust deflectors 6. Generator control panel window 2. Radiator cap access hole 7. Engine control panel window 3. Canopy 8. Mounting frame 4. Doors (attached to canopy) 9. Door latches 5. Engine exhaust pipe and cover Generator Set Figure 1 December 31/91 Revised...
  • Page 17 OM-2053 PHYSICAL BASIC GENERATOR SET Length overall 84 inches (2134 mm) Width 33 inches (838 mm) Height 43 inches (1092 mm) Weight (Approximate) 3655 pounds (1658 kg) TRAILER-MOUNTED GENERATOR SET Length overall 90 inches (2286 mm) Width 66 inches (1676 mm) Height 57 inches (1448 mm) Weight (Approximate)

  • Page 18: Canopy

    Two items of optional equipment are presently available for the 7009 & 7009A units: a cold-weather start- ing aid kit identified as Hobart Part No. 488913 , and a four-wheel trailer with fuel tank, identified as Ho- bart Part No. 280718 (7009) or Hobart Part No. 281056 (7009A). Refer to TO-186 in Chapter 5 for information on the four-wheel trailer.
  • Page 19 OM-2053 1. Generator7. Quick-start kit 13. Governor control box 2. Batteries (2) 8. Air cleaner 14. Engine control panel 3. Control box assembly 9. Engine assembly assembly 4. Muffler 10. Cooling fan 15. Exhaust pipe assembly 5. Rain cap 11. Radiator assembly 16.

  • Page 20: C.hobart Engine Equipment

    OM-2053 C.Hobart Engine Equipment The engine is modifiee at Hobart Brothers by the addition of the following equipment: (1) Electric governor system An electric governor kit is installed on the engine to replace a conventional, mechanical type. The electric governor was selected for control of engine speed (and generator output frequency) be- cause it provides faster engine response to changes in load conditions.

  • Page 21: Air Cleaner

    OM-2053 (4) Air cleaner The diesel-engine air cleaner (Fig. 4) is so constructed that air enters it through the perforated cy- lindrical body of the air cleaner itself, and is filtered in the process before being passed on to the engine intake manifold assembly.

  • Page 22: Generator

    OM-2053 1. Pipe, manifold-to-muffler 2. Muffler 3. Tail Pipe Exhaust System Figure 5 D. Generator The 400-Hz generator is a brushless, revolving field, three-phase, alternating current type. The rotor assembly is mounted by two, permanently lubricated, sealed, ball bearings. The front bearing is sup- ported by the fan housing;...

  • Page 23: Front Panel

    OM-2053 E. Control Box Assembly The control box (Fig. 6) is a sheet metal enclosure which houses and provides mounting facilities for generator controls, and engine and generator monitoring equipment. For access to components mounted inside the control box, it is necessary to remove two 1/4 X 20 - 1/2-inch hex bolts, and to pull down the front panel, which is hinged to the control box at the bottom.

  • Page 24: (C) Instrument Light

    OM-2053 (a) Sensing modules The voltage sensing module (4) and frequency sensing module (6) are connected to gener- ator output leads between the generator and load contactor. These solid-state modules sense any abnormal condition of voltage or frequency and signal the solid-state circuitry of the mem- ory and time delay module (7) to open the load contactor and disconnect output to the air- craft.
  • Page 25 OM-2053 Trip values for protective circuits are as follows: Overvoltage trips at 130 V to 134 V Undervoltage trips at 102 V or below Overfrequency trips at 415 Hz to 425 Hz Underfrequency trips at 390 Hz to 395 Hz Undervoltage time delay (adjustable) Overload circuit trips at any value over 125% rated load capacity.
  • Page 26 OM-2053 (g) Fuse-interlock relay The function of the fuse-interlock relay (8) is to interrupt the load contactor holding coil circuit and remove the load in case of a “blown” fuse (8, Fig. 6) in the protective relay coil circuit. (h) Auxiliary underfrequency relay The function of the auxiliary underfrequency relay (9) is to automatically open the excitation- deenergization relay and disconnect the voltage regulator any time generator frequency drops to 380 Hz or below.

  • Page 27: (B) Memory And Time Delay Module

    OM-2053 1. Excitation-deenergization relay 12. Bottom interior panel 2. Plug-interlock relay 13. Voltage regulator PC board 3. Rear interior panel 14. Terminal strips 4. Over-undervoltage module 15. Blocking diode assembly 5. Overload module 16. Ballast resistor, 6. Over-underfrequency module 20 ohm, 100 watt 7.

  • Page 28: (C) Oil Pressure Gage And Oil Pressure Switch

    OM-2053 (c) Oil pressure gage and oil pressure switch The oil pressure gage (10) is a bourdon tube type and indicates engine lubricating oil pres- sure. It is graduated from 0 PSI to 75 PSI. An oil pressure switch is mounted in a tee fitting di- rectly behind the gage.

  • Page 29: (D) Engine Starting Circuit

    OM-2053 (d) Engine starting circuit The pushbutton start switch (13 ) and permissive toggle switch (15) serve to connect power to the starter solenoid which functions to engage the starter gear with the flywheel ring gear and apply power to the starter motor to crank the engine. The permissive toggle switch (15) also stops the engine when the toggle is placed in the STOP (down) position.
  • Page 30 OM-2053 1. Panel light 9.Load contactor indicating light 2. Fuel gage 10. Engine oil pressure gage 3. Light switch 11. Engine circuit fuse (10-A) 4. DC Ammeter 12. Engine “ON” indicating light 5. Engine-generator control switch 13. Engine starter switch 6.
  • Page 31 OM-2053 (3) Overload module The overload module is located inside the generator control box. This overload module (5, Fig 7) is a solid-state device designed to interpret a signal from the current transformers and to send a signal to the protective monitor module (7, Fig. 7) when an overload condition exists in any gener- ator output phase.

  • Page 32: Load Contactor

    OM-2053 1. Contactor panel 3. Load contactor 2. Neutral terminal 4. E-F terminal Load Contactor Panel Figure 9 1. Bottom of control box 2. Ammeter current transformers 3. Line drop current transformers 4. Overload current transformers Current Transformers Figure 10 December 31/91 Revised Page 18...

  • Page 33: Section 2. Preparation For Use, Storage, Or Shipping

    OM-2053 SECTION 2. PREPARATION FOR USE, STORAGE, OR SHIPPING 1. Preparation for Use A. Inspection/Check Inspect the unit thoroughly prior to operation. (1) Remove blocking, banding, ties, and other securing material. (2) Inspect exterior for shipping damage such broken lights, damaged sheet metal, etc. (3) Open all canopy doors and inspect interior for foreign material such as rags, tools, shipping pa- pers, etc.

  • Page 34: Preparation For Storage

    OM-2053 NOTE: Conductor size recommended for AC output is 2/0 size. Use No. 12 size for control (E and F terminals). Large cables (A, B, C, N) should be equipped with terminals having at least a 3/8-inch diameter mounting hole. Mounting hole in small leads (E and F) should be at least 1/4-inch diameter. (5) Remove the terminal cover on the load side of the contactor and connect the phase cable terminal lugs to the appropriate terminal studs on the contactor: cable lug “A”...
  • Page 35 OM-2053 (a) Make certain the cooling system is adequately protected WARNING: Make certain of adequate ventilation before starting the engine. (b) Start the engine and operate at a fast idle (800 to 1000 RPM) until coolant temperature has reached at least 140 deg F. (c) Operate normal operating controls.
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  • Page 37: Section 3. Operation

    OM-2053 SECTION 3. OPERATION 1. General This section contains information and instructions for the safe and efficient operation of the equipment. Operating instructions are presented in step-by-step sequence of procedures to be followed in supplying 400-Hz power to an aircraft. WARNING: Improper operation can kill! Ear protection equipment may be necessary when working in close proximity to this equipment.
  • Page 38 OM-2053 1. Frequency meter 14. DC Ammeter 2. Voltmeter 15. Engine-generator control switch 3. AC Ammeter 16. Hourmeter 4. Meter switch 17. Load contactor control switch 5. Line switch 18. Coolant temperature gage 6. Reset switch 19. Load contactor indicating light 7.

  • Page 39: C.preparation For Power Delivery

    OM-2053 27. Automatic voltage control potentiometer (R5) 30. Cable length compensation rheostat 28. Cable size compensation rheostat 31. Voltage regulator fuse (5A) 29. Line-drop compensation on/off switch Operating Controls and Instruments Figure 1 (Sheet 2 0f 2) C.Preparation for Power Delivery The following are power delivery preparation procedures to be followed after the engine is started.

  • Page 40: Power Delivery

    OM-2053 D. Power Delivery (1) Place engine-generator control switch (15) in BUILD-UP-VOLTAGE position momentarily, then al- low it to position itself in GEN position. The electric governor will immediately increase engine speed to 2000 RPM and maintain it. (2) Observe generator instruments. Frequency meter (1) should indicate exactly 400 Hz. Voltmeter (2) should indicate 115 V AC when line switch (5) is in ANY line-to-neutral position, A-N, B-N, or C-N, and should read 200-V AC when it is in any line-to-line position, A-B, B-C, or C-A.

  • Page 41: Trailer Operation

    OM-2053 3. Trailer Operation A. Towing Observe the following rules when towing the trailer. (1) Be sure all output cables are disconnected and properly stowed. (2) Be sure parking brake is released. (3) Avoid turns which are shorter than the steering linkage will freely allow. (4) Avoid dangerous speed and sudden turns.
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  • Page 43: Chapter 2. Service

    OM-2053 CHAPTER 2. SERVICE SECTION 1. MAINTENANCE 1. General To make certain the generator set is always ready for operation, it must be inspected and maintained regularly and systematically so that defects may be discovered and corrected before they result in serious damage or failure of the equipment.

  • Page 44: Lubrication Schedule

    OM-2053 (1) Lubrication schedule Time schedules indicated on the Lubrication Chart, Fig. 1, are approximate. They are based on average operating conditions. It may be necessary to lubricate more frequently under severe oper- ating conditions such as: low engine temperatures, excessively heavy loads and high oil tempera- tures, or intermittent operation.

  • Page 45: Wheel Bearings

    OM-2053 (2) Wheel bearings Lubricate and check wheel bearing adjustment every 800 hours or semi-annually. Use a good quality automotive bearing lubricant grease ( Specification MIL-G-10924B or equivalent). Refer also to TO-186 in Chapter 5 of this manual for additional information on trailer lubrication. ITEM MAINTENANCE REQUIRED Lube Oil...

  • Page 46: Cleaning Instructions

    OM-2053 B. Cleaning Instructions CAUTIONS: (1) Do not rap the air cleaner on a hard surface to clean it, and (2) Never leave the air inlet ducting open longer than necessary during the service procedure. (1) Pressurized air cleaning After removing the air cleaner from the generator set, blow air into the outlet neck, causing dust to flow off the air cleaner filter media.

  • Page 47: Radiator Cap

    OM-2053 B. Radiator Cap (1) General A pressure valve is built into the radiator cap. It is designed to open at a pressure of approxi- mately seven pounds per square inch. (2) Removal To remove, turn the cap to the left (counterclockwise) to the safety stop. When all pressure is re- leased, press down on the cap and continue to turn until the cap is free to be removed.

  • Page 48: Installing The Antifreeze Solution

    OM-2053 FREEZING POINT PERCENTAGE OF ANTI- (FAHRENHEIT) FREEZE IN SOLUTION 33-1/3% Antifreeze Solution Table Figure 2 (4) Installing the antifreeze solution Before installing antifreeze in the system, make the following checks: (a) Check the system for signs of leaks (b) Inspect all hoses and tighten all hose clamps. Install new hoses if necessary. (c) Drain and clean the system.

  • Page 49: Cleaning The Radiator Core

    OM-2053 (2) Fill the cooling system with clean coolant (Ref. Para. 7, H) . (3) Add a flushing compound, that is compatible with aluminum, to the cooling system in accordance with the instructions furnished with the compound. (4) Start the engine and flush the system as directed by the instructions furnished with the compound. (5) After the system has been flushed and thoroughly cleaned of the compound, refill the clean cool- ant (Ref.

  • Page 50: Drive Belts

    OM-2053 8. Drive Belts A single belt from the crankshaft pulley is used to drive the alternator and water pump. For proper engine operation this belt should be in good condition and at proper tension at all times. A. Checking Belt Tension Check belt tension every 200 hours of engine operation, or bi-weekly.

  • Page 51: Liquid Level

    OM-2053 D. Liquid Level CAUTION: Never add any special battery dopes, solutions or powders. The electrolyte in each cell should be above the plates at all times to prevent battery failure. Check the level of the electrolyte every two weeks. When electrolyte level is low, add pure distilled water. Do not use hydrant water or any water which has been in contact with a metal container.

  • Page 52: Service Helps

    OM-2053 10. Service Helps A. Wiring All small wire leads are routed through plastic flexible conduit which protects them and makes a neat easily removable and replaceable wiring harness arrangement. This wiring method allows the replace- ment of a single wire lead with a minimum of difficulty. All wires are color coded. B.
  • Page 53 OM-2053 Removable Rear Frame Cross Member Figure 3 December 31/91 Revised Page 11...
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  • Page 55: Section 2. Inspection/Check

    OM-2053 SECTION 2. INSPECTION/CHECK 1. General This section describes inspections and checks to be performed in conjunction with Inspection/Check Schedule, Figure 1. 2. Engine A. Fuel (See Fig. 1 for time schedules) (1) Check fuel quantity DAILY. (2) Drain fuel filters and change fuel filter elements in accordance with instructions in Perkins Diesel Shop Manual.

  • Page 56: Electrical System (12-V Dc)

    OM-2053 Daily Or Every 8 Hours Inspect air cleaner Check generator ammeter Check output cable and connector Check frequency meter Check generator voltmeter Check all lights Check fuel quantity Weekly, Or Every 50 Hours Check crankcase oil level Check all lights Check coolant level Monthly, Or Every 200 Hours Check safety switches...

  • Page 57: Wiring And Connections

    OM-2053 LIGHT LAMP LAMP (BULB) IDENTIFICATION LOCATION MANUFACTURER NUMBER Instrument Panel Control Box and Lamp Industry Lights Engine Control Panel Trade No. Engine On Indicating Engine Control Lamp Industry 1815 Light Panel Trade No. Contactor CLOSED Engine Control Lamp Industry 1815 Indicating Light Panel...

  • Page 58: Electrical System (115-V Ac)

    OM-2053 4. Electrical System (115-V AC) The 400-Hz generator and controls are designed to be as maintenance free as possible. No lubrication is necessary and no periodic maintenance adjustments are required. However, some regular checks should be made to be sure all controls, instruments, etc., are working properly. A.

  • Page 59: Section 3. Adjustment/Test

    OM-2053 SECTION 3. ADJUSTMENT/TEST 1. General Adjustment and test procedures are most applicable to testing and adjusting the generator set after a ma- jor repair, replacement of parts, or overhaul. 2. Generator Set Test A. Pre-operational Test Procedures (1) Connect cables from the generator output terminals to a load bank. Use cables of the same size and length as those to be used in service.
  • Page 60 OM-2053 (2) Check operation of engine instruments: DC ammeter (14, Fig. 1) , coolant temperature indicator (18) , oil pressure gage (20) , and hourmeter (16) . (3) Check engine idle speed. Should be 825 to 875 RPM. Adjust, if necessary, in accordance with in- structions in Engine Operator’s Manual.
  • Page 61 OM-2053 (16) Release the switch (17) and allow it to return to the center ON position. The load contactor should open immediately, and the generator “on” indicating light should go OFF. This is because the plug interlock relay (Ref. 1-1; 1, Fig. 8) is not receiving power from an outside source of 28 V DC. It in- dicates that the plug interlock contacts are OPEN as they should be when the interlock coil is not re- ceiving 28-V DC power.
  • Page 62 OM-2053 (30) Check operation of the line switch (5) . A normal voltage of 115 V AC should be indicated when the switch is in LINE-TO-NEUTRAL position. A voltage of approximately 200 V AC should be indi- cated when the switch is placed in LINE-TO-LINE position. (31) Check accuracy of frequency meter.
  • Page 63 OM-2053 (c) If the load contactor is not opened at 103 V to 93 V, refer to the Trouble Shooting Chart, Sec- tion 3-1, to determine which component of the undervoltage protective circuit is defective. (d) If the undervoltage circuit performs satisfactorily, return the unit to normal operation by adjust- ing the voltage to 115 V, pressing the reset switch, and closing the load contactor.
  • Page 64 OM-2053 1. Frequency meter 14. DC Ammeter 2. Voltmeter 15. Engine-generator control switch 3. AC Ammeter 16. Hourmeter 4. Meter switch 17. Load contactor control switch 5. Line switch 18. Coolant temperature gage 6. Reset switch 19. Load contactor indicating light 7.

  • Page 65: Generator Set Adjustment

    C.Basic Engine Adjustments Adjustment procedures applicable to the diesel engine are included in the Perkins Diesel Handbook which accompanies this Hobart manual. Specific information for this particular engine is listed in Fig- ure 2. December 31/91 Revised Page 7...

  • Page 66: Generator And Fan Belt Adjustment

    E. Electric Governor System Adjustment (Woodward Governor Kit) (1) General The Hobart electric governor kit, used on units built before November, 1990 is identified as Hobart Part No. 488701, and consists of Woodward governor parts with brackets and hardware added by Hobart Brothers to install the governor system on generator sets in this series.

  • Page 67: Actuator Linkage Adjustment

    OM-2053 (2) Actuator linkage adjustment The proper adjustment of the mechanical linkage between the electric actuator and engine speed control lever is important to the satisfactory operation of the complete system. Exact adjustment instructions regarding effective length of rod assembly (6, Fig. 3), or regarding the proper hole in actuator lever in which to attach ball joint (4) cannot be determined because of slight variations in brackets, mountings, and engine performance characteristics.
  • Page 68 OM-2053 (3) Magnetic pickup adjustment The strength of the magnetic pickup signal to the control box can be weakened if the tip of the pickup is too far from the flywheel ring gear. If the pickup is to be removed for any reason, or if the signal is weak (less than 2.5-V AC) as indicated by a voltage test at the pick-up with the engine running at rated speed, proceed as follows: (a) Disconnect “pull-apart”...

  • Page 69: Governor Control Unit Adjustment

    OM-2053 (4) Governor Control Unit Adjustment Before making an adjustment to the control unit (Fig. 5), make certain that linkage between actua- tor lever (3, Fig. 3) and fuel control lever (7, Fig. 3) is properly adjusted. There must be no lost motion or “play”...
  • Page 70 OM-2053 1. Gain asjustment 2. Stability adjustment 3. Rated speed adjustment Electric Governor Control Box (Woodward) Figure 5 Electric Governor Controller Terminal Strip Connections (Woodward Governor) Figure 6 December 31/91 Revised Page 12...

  • Page 71: Electric Governor System Adjustment (Barber-Colman Governor Kit)

    Part No. 282671, and consists of Barber-Colman governor parts with brackets and hardware added by Hobart Brothers to install the governor system on generator sets in this series. The Bar- ber-Colman governor system consists of (1) an electric controller, (2) an actuator, and (3) a magnetic-pick-up that is installed in the flywheel housing, which senses engine speed off the fly- wheel teeth.
  • Page 72 OM-2053 (h) Check governor linkage for freedom of travel. Move the rod assembly manually to see that there isn’t any binding or lost motion in linkage. Make corrections if and as required. (j) Make a preliminary setting of engine idle speed by adjusting the idle speed set screw, which is located on the engine speed control lever.

  • Page 73: Magnetic Pick-Up Inspection / Adjustment

    OM-2053 (3) Magnetic Pick-up Inspection / Adjustment Figure 8 shows how the magnetic pick-up is mounted. Typically, this area of the generator set can be seen by opening the door on the front left side of the generator set and viewing the side of the flywheel housing.

  • Page 74: Governor Controller Adjustment

    OM-2053 (4) Governor Controller Adjustment The governor controller is located on the large panel to the left of the generator control box, as viewed from the left side of the generator set. Before making an adjustment to the controller, make sure the linkage between the actuator and the engine speed control is free and properly ad- justed.
  • Page 75 OM-2053 Electric Governor Control Box (Barber-Colman Governor) Figure 9 Electric Governor Controller Terminal Strip Connections (Barber-Coleman Governor) Figure 10 December 31/91 Revised Page 17...

  • Page 76: Troubleshooting

    OM-2053 (7) Troubleshooting When installing the governor, carefully follow the instructions for installation and adjustment. To further aid in checking installation and servicing of the governor after it has been in use, check the following troubleshooting hints. Engine speed lugs down when load is applied Governor controller improperly adjusted.

  • Page 77: Generator And Exciter Test

    OM-2053 4. Generator and Exciter Test The generator fields may be tested with a “Kelvin” bridge. This is a double-bridge type instrument required for the very low resistances encountered in this test. It is understood that 0 resistance indicates a SHORT CIRCUITED condition.
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  • Page 79: Chapter 3.Troubleshooting

    OM-2053 CHAPTER 3. TROUBLESHOOTING SECTION 1. TROUBLE SHOOTING PROCEDURES 1. General A. Troubleshooting is an orderly process of checking and eliminating possible causes of trouble until the exact cause of a trouble is found. As a rule, the best place to start looking for the cause of a trouble in a circuit is at the source of power.

  • Page 80: Equipment For Troubleshooting

    OM-2053 3. Equipment for Troubleshooting A good quality multi-scale voltohmmeter is the only instrument required for trouble shooting. At least two “jumper” leads with “alligator” clips and test prods will be required. The 12-V, engine electrical system may be used as a 12-V DC power source. 4.

  • Page 81: Checking Connections And Leads

    OM-2053 Trip PC Board Trip Value Trip Time Within: Reset Value Overload 387738A 112 KVA 5 Minutes —————— —- Overvoltage 482038 130 - 134 V-AC ———————- 125 V-AC 482038A 125.5 - 126.6 V-AC 1 - 2 seconds 120 V-AC Undervoltage 482038 93 - 102 V-AC 4 - 12 seconds...
  • Page 82 OM-2053 1. Frequency meter 14. DC Ammeter 2. Voltmeter 15. Engine-generator control switch 3. AC Ammeter 16. Hourmeter 4. Meter switch 17. Load contactor control switch 5. Line switch 18. Coolant temperature gage 6. Reset switch 19. Load contactor indicating light 7.

  • Page 83: Illustrations

    OM-2053 27. Automatic voltage control potentiometer (R5) 30. Cable length compensation rheostat 28. Cable size compensation rheostat 31. Voltage regulator fuse (5A) Operating Controls and Instruments Figure 1 (Sheet 2 of 2) 9. Engine Trouble Shooting Procedures The following engine trouble shooting procedures were taken from Perkins Diesel Handbook. Certain ab- normal conditions which may interfere with satisfactory engine operation, together with methods of deter- mining the cause of such conditions, are covered in the Trouble Shooting Chart.
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  • Page 85 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY NOTE: Diesel engine trouble shooting is covered in John Deere Shop Manual under Fault Diagnosis. ENGINE CONTROLS 1. Engine will not A. Batteries discharged, A. Check voltage across bat- start.
  • Page 86 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 3. Engine will not A. No fuel A. Before attempting to find start. Cranking the cause of “no fuel”, speed normal. prime the fuel filters by removing pipe plug in the cover of each.
  • Page 87 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 3. Engine will not (7) Defect in inject- (7) Refer to Perkins start. Cranking or racks or link- Handbook. Make adjust- speed normal (Continued). ments and/or repairs according to instruc- tions therein.
  • Page 88 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 5. Engine starts. Stops after B. Defective or incor- B. Check wiring to high temper- a few seconds by automatic rectly wired high ature switch. One Red-Yellow wire shutdown.
  • Page 89 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 7. Engine will not come “up” D. Defective actuator D. Refer to connection and sche- to governed speed in GEN matic diagram in Chapter 6 and mode.
  • Page 90 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 9. Engine is unsteady A. Fault in engine A. Before condemning the gover- (surges) under load nor system for surging, make certain the fault is not in the engine.
  • Page 91 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY ENGINE AND CONTROLS (CONTINUED) 12. Engine lacks power A. Improper engine A. “Tune-up” the engine in adjustments and gear accordance with Perkins Diesel train timing Handbook B. Insufficient fuel B.
  • Page 92 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY GENERATOR EXCITATION CIRCUITS 1. No (or low) gen- (3) Defective ballast (3) If output voltage was erator output volt- resistor, (See produced when the gener- age in all phases. 1-1;...
  • Page 93 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY LOAD CONTACTOR OPERATING CIRCUIT 1. Load contactor (K1) A. In addition to de- A. After checking fuse (F1) in will not close when fective wiring and step (1) below, check all control switch (20, connections in the AC wiring and connections in...
  • Page 94 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY LOAD CONTACTOR OPERATING CIRCUIT (Continued) 2. Load contactor (K1) A. 28.5-V DC is not A. Proceed as follows to find will close when reaching plug inter- the cause of this mal- control switch (20, lock relay (K2) from function.
  • Page 95 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY LOAD CONTACTOR OPERATING CIRCUIT (Continued) 3. Load contactor B. A fault has devel- B. If the load contactor cannot opens during power oped in the load be closed by operation of delivery.
  • Page 96 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY PROTECTIVE CIRCUIT (CONTINUED) 2. Load contactor A. An undervoltage con- A. Observe generator voltage on opens during power dition caused the voltmeter and adjust to normal delivery. Under- over-undervoltage 115 V AC with voltage voltage indicating sensing module (K26)
  • Page 97 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY PROTECTIVE CIRCUIT (CONTINUED) 4. Load contactor A. Electric governor A. Proceed as follows: opens during power improperly adjusted, delivery. Under- or malfunctioning frequency light ON. (1) Governor improp- (1) Adjust in accordance erly adjusted with Sect.
  • Page 98 OM-2053 TROUBLE, SYMPTOM TEST, CHECK, AND/OR AND CONDITION PROBABLE CAUSE REMEDY GENERATOR 1. No (or low) voltage A. Shorted diode in A. Check diodes in accordance output exciter rectifier with Sect. 2-3, para. 6. If (CR2). diodes are good, proceed to step B.

  • Page 99: Chapter 4. Illustrated Parts List

    The Illustrated Parts List identifies, describes, and illustrates main assemblies, subassemblies, and detail parts of the engine-driven generator sets manufactured by Hobart Brothers Company, Power Systems Group, Troy, Ohio, 45373. These sets are identified as Hobart Specification No. 7009-1, Specification No. 7009A-1, and Specification No. 7009B-1.

  • Page 100: Parts List Form

    (2) HOBART PART NUMBER Column ALL part numbers appearing in this column are Hobart numbers. In all instances where the part is a purchased item, the vendor’s identifying five-digit code and his part number will appear in the NOMENCLATURE column.

  • Page 101: Section 2. Manufacturer's Codes

    OM-2053 SECTION 2. MANUFACTURER’S CODES 1. Explanation of Manufacturer’s (Vendor) Code List The following list is a compilation of vendor codes with names and addresses for suppliers of purchased parts listed in this publication. The codes are in accordance with the Federal Supply Codes for Manufac- turer’s Cataloging Handbook H4-1, and are arranged in numerical order.
  • Page 102 OM-2053 CODE VENDOR’S NAME AND ADDRESS 18265 Donaldson Co. Inc. 400 W. 94th St. P.O. Box 1299 Minneapolis, MN 55440 19220 Eberhard Manufacturing Company 21944 Drake Road Strongsville, OH 44136 20038 ESB Inc. 5 Penn Center Plaza P.O. Box 8109 Philadelphia, Pennsylvania 19101 20598 Tech.
  • Page 103 OM-2053 CODE VENDOR’S NAME AND ADDRESS 51377 Kysor of Caddilac 1100 Wright St. Cadillac, MI 49601 51589 ST - SEMICON, INC. 415 N. College Ave. Bloomington, IN 47401 57448 Allis Chalmers Corp. Stevens & Adamson Mfg. Subsidiary 275 Ridgeway Avenue, P.O.
  • Page 104 OM-2053 CODE VENDOR’S NAME AND ADDRESS 79470 Dana Corp., The Weatherhead Division 767 Beta Drive Cleveland, OH 44143 80183 Sprague Products 87 Marshall Street North Adams, MA. 01247 81074 ITT - Holub Industries 413 Elm Street Sycamore, Illinois 60178 81518 Flexaust Co.

  • Page 105: Section 3. Parts List

    OM-2053 SECTION 3. PARTS LIST 1. Explanation of Parts List Arrangement The parts list is arranged so that the illustration will appear on a lefthand page and the applicable parts list will appear on the opposite righthand page. Unless the list is unusually long, the user will be able to look at the illustration and read the parts list without turning a page.
  • Page 106 OM-2053 Generator Set Figure 1 December 31/91 Revised Page 2...
  • Page 107 No Number . GENERATOR SET WITHOUT CANOPY (For Details See Fig. 3) No Number . FRAME GROUP (For Details See Fig. 3) 402987 . LABEL, HOBART 280718 . TRAILER, FENDERS, FUEL TANK (OPTION) 281056 . TRAILER, FENDERS, FUEL TANK (OPTION)
  • Page 108 OM-2053 Canopy Assembly Figure 2 December 31/91 Revised Page 4...
  • Page 109 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY NO NUMBER CANOPY ASSEMBLY (For NHA See Fig. 1) NO NUMBER CANOPY ASSEMBLY (For NHA See Fig. 1) 280583 . PANEL, FRONT 281074 . PANEL, FRONT 280635 . PANEL, REAR 281115 .
  • Page 110 OM-2053 Generator Set Without Canopy (Specification 7009B-1 Illustrated) Figure 3 December 31/91 Revised Page 6...
  • Page 111 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY No Number GENERATOR SET WITHOUT CANOPY (For NHA See Fig. 1) No Number . GENERATOR GROUP (For Details See Fig. 13) 282871-1 . BATTERY,12 VOLTS (For Details See Fig. 9A) 402086-2 .
  • Page 112 OM-2053 This page intentionally left blank. December 31/91 Revised Page 8...
  • Page 113 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY (CONTINUED) 280722B . PANEL, CONTACTOR, ASSY. (For Details See Fig. 12) 281117 . LEG, SUPPORT, CONTROL BOX 280914 . SHROUD, AIR, ASSY. 84A-1101 . KIT, STARTER, SPACER * NOT ILLUSTRATED...
  • Page 114 OM-2053 Radiator and Cooling System Group Figure 4 December 31/91 Revised Page 10...
  • Page 115 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY No Number RADIATOR AND COOLING SYSTEM GROUP (For NHA See Fig. 3) 180954 . RADIATOR 280054 . SUPPORT, RADIATOR 405743 . CAP, RADIATOR, 7 LB., V78225, NO.AAX-4018 281031 . SHROUD, FAN, ASSEMBLY 280942 .
  • Page 116 OM-2053 Air Cleaner Assembly Figure 5 December 31/91 Revised Page 12...
  • Page 117 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 281035 KIT, AIR CLEANER, ASSY (For NHA See Fig. 3) 181128 . CLEANER, AIR 403483 . CLAMP, HOSE 281036 . PIPE, AIR INTAKE, ASSY. 85A-1045 . REDUCER, RUBBER W-10869-6 .
  • Page 118 OM-2053 Electric Governor Kit (Woodward Governor) Figure 6 December 31/91 Revised Page 14...
  • Page 119 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 488701 KIT, ELECTRIC GOVERNOR, ASSY * * (WOODWARD GOVERNOR) (For NHA See Fig. 3) 281774-2 . SENSOR, MAGNETIC, GOVERNOR 84A-1009 . CONTROLLER, GOVERNOR, ELECTRIC V31361, No. 8290-040 84A-1020 . ACTUATOR, GOVERNOR, ELECTRIC V31361, No.
  • Page 120 OM-2053 Electric Governor Kit (Barber-Colman Governor) Figure 6A December 31/91 Revised Page 16...
  • Page 121 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 6A - 282671 GOVERNOR ASSY. (For NHA See Fig. 3) * * 281772 . ACTUATOR, GOVERNOR, ELECTRIC V03613,No. DYNC-10502-000-0-12 282501 . CONTROLLER, GOVERNOR, ELECTRIC V03613,No. DYN1-10704 282673 . BRACKET, MTG. ACTUATOR 282674 .
  • Page 122 OM-2053 Fuel Lines Assembly Figure 7 December 31/91 Revised Page 18...
  • Page 123 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 281013 LINES, FUEL, ASSEMBLY (For NHA See Fig. 3) 281013A LINES, FUEL, ASSEMBLY (For NHA See Fig. 3) 400818-1 . BUSHING, PIPE, STEEL 400819-2 . VALVE, BALL (ECON-O-MITE) W-7814-1 .
  • Page 124 OM-2053 Oil Line Assembly Figure 8 December 31/91 Revised Page 20...
  • Page 125 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 488695 LINE, OIL, ASSEMBLY (For NHA See Fig. 3) 403809-1 . SWITCH, LOW OIL PRESSURE V51377, No. C-25900-10 W-10909-1 . TEE, STREET, BRASS V79470 W-10886-1 . CONNECTOR, MALE, WEATHERHEAD V79470, No.
  • Page 126 OM-2053 Battery Installation For units having TWO batteries Figure 9 Battery Installation For units having ONE battery Figure 9A December 31/91 Revised Page 22...
  • Page 127 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY NO MUMBER BATTERY INSTALLATION (For NHA See Fig. 3) (For units having TWO batteries) 402086-2 . BATTERY, 12 VOLTS 280952 . TRAY, BATTERY A-25 . SPACER, BATTERY TRAY 280951 .
  • Page 128 OM-2053 Control Box Assembly Figure 10 December 31/91 Revised Page 24...
  • Page 129 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 280543-2 BOX, CONTROL, ASSEMBLY (For NHA See Fig. 3) 401937-3 . STRIP, TERMINAL V98410, No. 35012-3526 401564-4 . HOUSING, SOCKET, CONNECTOR, V89110, No. 1-480287-0 489811 . BOARD, PC, VOLTAGE REG., 400 HZ 404065-2 .
  • Page 130 OM-2053 This page intentionally left blank December 31/91 Revised Page 26...
  • Page 131 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY (CONTINUED) 76A-1118 . SWITCH, SNAP, PUSHBUTTON, V27192, No. SA35BCB34-9 482291 . NAMEPLATE, PROTECTIVE SYSTEM ICZ-148 . TRANSFORMER, CURRENT, LINE DROP & OVERLOAD, V50508, No. E-6170 405154-5 . RESISTOR, BALLAST, 100 WATT 430340 .
  • Page 132 OM-2053 Engine Control Panel Assembly Figure 11 December 31/91 Revised Page 28...
  • Page 133 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 280542-1 PANEL ASSEMBLY, CONTROL, ENGINE (For NHA See Fig. 3) 280545 . PANEL, CONTROL, ENGINE 280612 . NAMEPLATE, CONTROLS 82B-1047 . LIGHT, PANEL, 12 VOLT FW-1312 . SWITCH, TOGGLE, DPST V27192, No. 7320K3 Y-680 .
  • Page 134 OM-2053 Contactor Panel Assembly Figure 12 Revised Page 30 March 30/93...
  • Page 135 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 280722C CONTACTOR PANEL ASSEMBLY (For NHA See Fig. 3) 280723C . PANEL, CONTACTOR 402119-4 . SCREW 1/4 - 20 X 3/4, HHC, ST. 282130-1 . CONTACTOR, 3-POLE 402119-8 . SCREW, 1/4 - 20 x 1-1/2, HHC, ST.
  • Page 136 OM-2053 Generator Group Figure 13 December 31/91 Revised Page 32...
  • Page 137 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 280786 GENERATOR ASSY (For NHA See Fig. 3) 387617A . COVER, FAN, HOUSING DELETED 488908 . FAN & COUPLING ASSEMBLY ** 3A W-11102-19 . SCREW, FLEXIBLE COUPLING * * 4 482483 .
  • Page 138 OM-2053 Trailer Assembly Figure 14 December 31/91 Revised Page 34...
  • Page 139 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY 280718 TRAILER GROUP (OPTION) 281056 TRAILER GROUP (OPTION) 181077A . TRAILER, ASSY., V22938, No. 747 85B-1013 . TIRE, 5:30 X 12 181079 . BRAKE, ASSY. 280597 . . LEVER, BRAKE MOUNT, ASSY.
  • Page 140 OM-2053 This page intentionally left blank December 31/91 Revised Page 36...
  • Page 141 OM-2053 NOMENCLATURE UNITS FIGURE HOBART ITEM NO. PART NO. 1234567 ASSY (CONTINUED) 85A-1022 . . . BEARING, CONE, OUTER, V22938, No. 6151 85A-1021 . . . BEARING, CONE, INNER, V22938, No. 6050 85A-1023 . . . SEAL, GREASE, V22938, No. 6300 85A-1024 .
  • Page 142 OM-2053 This page intentionally left blank December 31/91 Revised Page 38...
  • Page 143 OM-2053 SECTION 4. NUMERICAL INDEX 1. Explanation of Numerical Index The purpose of this index is to assist the user in finding the illustration and description of a part when the part number is known. Part numbers are arranged in alpha-numerical sequence. Thus, any part number beginning with the letter A would be located at or near the top of the index list.
  • Page 144 OM-2053 FIGURE & ITEM PART NUMBER NUMBER W-11242-5 12-7 W-11242-10 12-11 W-11254-4 5-10, 12-8 W-11254-8 12-12 W-11263-6 12-14 W-11278-5 12-13 W-11278-7 5-11 W-11280-2 12-9 W-11280-3 6-7, 6A-10 W-11338-5 14-9 W-7814-1 W-7814-3 7-14 W-7814-4 4-14 W-7814-10 7-15 W-8095A-8 10-27 W-8105A-4 10-26 W-9407-138 9-8, 9A-8 W-9476-11...
  • Page 145 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 181129 181346 13-22 181825 9A-2 181831 9A-3 20RT-353-1 11-16 25MS-156 11-15 280054 280488 280531 10-24 280534 10-16 280542-1 3-17, 11-0 280543-2 3-3, 10-0 280545 11-1 280559 280564 14-20 280565 14-18 280575 280579 280581 14-14 280582 14-15...
  • Page 146 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 280727 14-2 280786A 13-0 280861 280914 3-27 280941 280942 280951 280952 281013 3-23, 7-0 281013A 3-23, 7-0 281031 281034 281035 3-6, 5-0 281036 281040 281041-1 3-11 281050 3-10 281056 1-5, 14-0 281058 14-18 281071 281074 281093...
  • Page 147 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 30GH-764 11-8 30523 7-21 363136-2 10-40 370891 10-8 385950 13-25 386612 386751 4-11 387617A 13-1 387620A-1 13-18 387623-1 13-9 387624A-1 13-14 387736C 10-22 387738A 10-19 387748-1 13-23 388827-14 9A-4 388828-9 9A-5 400030-1 10-14 400059-3 11-20 400078...
  • Page 148 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 402987 403091-5 11-11 403091-6 10-50 403153-1 2-14 403189 11-6 403336 10-49 403483 403590-1 403782-2 4-13 403809-1 404065-2 10-4 404100 11-14 404154-15 3-16 404172-1 10-31 404402-2 10-5 404460-1 10-20 404528 14-31 404529 14-29 404530 14-30 04595 405071-1...
  • Page 149 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 488755 13-7 488908 3-15, 13-3 489030 489180 13-17 489658-5 10-52 489811 10-3 482989 6-11, 6A-2 5CW-2048 9-6, 9A-6 50MS-732-0 6-12 56531 56532 4-10 56534 56548 56587 7-11 7009-1 7009A-1 7009B-1 76A-1118 10-32 76B-1148 2-17 76A-1152 14-19...
  • Page 150 OM-2053 FIGURE & ITEM PART NUMBER NUMBER 84A-1007-1 84A-1020 84A-1050 84A-1075 6-10, 6A-11 84A-1081 14-51 84A-1082 14-52 84A-1101 3-28 85A-1019 14-34, 14-52, 14-57 85A-1020 14-35, 14-53 85A-1021 14-37, 14-55 85A-1022 14-36, 14-54 85A-1023 14-38, 14-56 85A-1024 14-39, 14-57 85A-1025 14-41, 14-59 85A-1026 15, 52 85A-1027...

  • Page 151: March

    This chapter provides documentation covering any optional equipment furnished with your generator. Available options are listed below. OPTION NAME MANUAL HOBART NO. 7009 - Trailer, Fenders, Fuel Tank, and Parts OM-2053 280718 7009A - Trailer, Fenders, Fuel Tank, and Parts...
  • Page 152 OM-2053 This page intentionally left blank. March 20/89 Page 2...
  • Page 153 OM-2053 CHAPTER 6. MANUFACTURER’S LITERATURE Voltage Regulator Hobart Brothers Company Operation and Maintenance Manual OM-2020 Electric Governor Woodward Governor Company for Specifications 7009 and Electrically-Powered Governor 7009A units Instruction Manual Electric Governor Barber-Colman Governor Company for Specification 7009B units Electrically-Powered Governor...
  • Page 154 OM-2053 This page intentionally left blank. December 31/91 Revised Page 2...
  • Page 175 OM-2053 UNUSUAL SERVICE CONDITIONS This information is a general guideline and cannot cover all possible conditions of equipment use. The specific local environments may be dependent upon conditions beyond the manufacturer’s control. The manufacturer should be consulted if any unusual conditions of use exist which may affect the physical con- dition or operation of the equipment.
  • Page 176 OM-2053 This page intentionally left blank. Unusual Service Conditions December 31/91 Revised Page 2...
  • Page 177 OM-2053 Wet-Stacking in Generator Set Diesel Engines All diesel engines operated for extended periods under light load may develop a condition commonly referred to as wet-stacking. This condition results from the accumulation of unburned fuel in the exhaust system. It is recognizable by fuel oil wetness around the exhaust manifold, pipes, and muffler.
  • Page 178 This page intentionally left blank. Wetstacking December 31/91 Revised Page 2...

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