Hobart Jet-Ex 5D Operation And Maintenance Manual

OM-2094

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110100 Revised 01/01 Revised 02/01 Revised 03/01 Revised 05/01 Revised 06/01 Revised 07/01 Revised 08/01

Operation and Maintenance Manual

Jet-Ex 5D Generator Sets

Hobart Brothers Company (hereinafter called HOBART) warrants that each new and unused Hobart Ground Power Equipment, (hereinafter called the PRODUCT) is of good workmanship and is free from mechanical defects,

Series 500285

Hobart Brothers Company

Ground Power Division

Troy, Ohio 45373

U.S.A.

WARRANTY

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HOBART BROTHERS COMPANY, TROY, OHIO, U.S.A.

GROUND POWER DIVISION

1. Hobart Brothers Company (hereinafter called HOBART) warrants that each new and unused Hobart Ground

Power Equipment, (hereinafter called the PRODUCT) is of good workmanship and is free from mechanical defects, provided that (1) the PRODUCT is installed and operated in accordance with the printed instructions of HOBART, (2) the PRODUCT is used under the normal operating conditions for which it is designed, (3) the PRODUCT is not subjected to misuse, negligence or accident, and (4) the PRODUCT receives proper care, lubrication, protection, and maintenance under the supervision of trained personnel.

2. This warranty expires 15 months after shipment by HOBART to the first user, or 12 months after installation,

whichever first occurs.

3. This warranty does not apply to: primary and secondary switch contacts, cable connectors, carbon brushes, fuses,

bulbs, and filters unless found to be defective prior to use.

4. Hobart DOES NOT WARRANT THE FOLLOWING COMPONENTS: Engines (gasoline or diesel),storage

batteries, engine starters generators, alternators, regulators, governors, tires, axles,transmissions, and cable retrieving devices. Many of the foregoing components are warranted directly by the manufacturer to the first user and serviced by a worldwide network of distributors and others authorized to handle claims for component manufacturers. A first user’s claim should be presented directly to such an authorized component service outlet. In the event any component manufacturer has warranted its component to HOBART and will not deal directly with a first user then HOBART will cooperate with the first user in the presentation of a claim to such manufacturer. Under NO circumstances does HOBART assume any liability for any warranty claim against or warranty work done by or in behalf of any manufacturer of the foregoing components.

5. This warranty is extended by HOBART only to the purchaser of new PRODUCTS from HOBART or one of its

authorized distributors. The PRODUCTS purchased under this warranty are intended for use exclusively by the buyer and his employees and by no other persons and, therefore, there shall be no third party beneficiary to this warranty.

6. A claim of defects in any PRODUCT covered by this warranty is subject to HOBART factory inspection and

judgment. HOBART’S liability is limited to repair of any defects found by HOBART to exist, or at HOBART’S option the replacement of the defective product, F.O.B. factory, after the defective product has been returned by the purchaser at its expense to HOBART’S shipping place. Replacement and exchange parts will be warranted for the remainder of the original Warranty, or for a period of ninety (90) days, whichever is greater.

7. UNDER NO CIRCUMSTANCES whatsoever shall HOBART and its authorized distributors be liable for any special

or consequential damages, whether based on lost goodwill, lost resale profits, work stoppage impairment of other goods or otherwise, and whether arising out of breach of any express or implied warranty, breach of contract, negligence or otherwise, except only in the case of personal injury as may be required by applicable law.

8. Continued use of the PRODUCT(S) after discovery of a defect VOIDS ALL WARRANTIES.

9. Except as authorized in writing, this warranty does not cover any equipment that has been altered by any party

other than HOBART.

10. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HERE OF.

HOBART MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

11. HOBART neither assumes nor authorizes any person to assume for HOBART any liability in connection with the

PRODUCTS sold, and there are no oral agreements or warranties collateral to or affecting this written Warranty.

This warranty and all undertakings of HOBART thereunder shall be governed by the laws of the State of Ohio, United States of America.

AT ALL TIMES, SAFETY MUST BE CONSIDERED AN IMPORTANT FACTOR IN THE INSTALLATION,

SERVICING AND OPERATION OF THE PRODUCT, AND SKILLED, TECHNICALLY QUALIFIED PERSONNEL

SHOULD ALWAYS BE EMPLOYED FOR SUCH TASKS.

WARNING

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Safety Warnings and Cautions

WARNING

CALIFORNIA PROPOSITION 65 - DIESEL ENGINES. Diesel engine exhaust

and some of its constituents are known to the State of California to cause cancer, birth defects and other reproductive harm.

WARNING

IMPORTANT

General

Equipment that supplies electrical power can cause serious injury or death, or damage to other equipment or property. The operator must strictly observe all safety rules and take precautionary actions. Safe practices have been developed from past experience in the use of power source equipment. While certain practices below apply only to electrically-powered equipment, other practices apply to engine-driven equipment, and some practices to both.

Shock Prevention

Bare conductors, or terminals in the output circuit, or ungrounded, electrically-live equipment can fatally shock a person. Have a certified electrician verify that the equipment is adequately grounded and learn what terminals and parts are electrically HOT. Avoid hot spots on machine. Use proper safety clothing, procedures, and test equipment.

The electrical resistance of the body is decreased when wet, permitting dangerous currents to flow through it. When inspecting or servicing equipment, do not work in damp areas. Stand on a dry rubber mat or dry wood, use insulating gloves when dampness or sweat cannot be avoided. Keep clothing dry, and never work alone

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.

Protect all operating personnel. Read, understand, and follow all instructions in the Operating/Instruction Manual before installing, operating, or servicing the equipment. Keep the manual available for future use by all operators.

a. Installation and Grounding of Electrically Powered Equipment

Equipment driven by electric motors (rather than by diesel or gasoline engines) must be installed and maintained in accordance with the National Electrical Code, ANSI/NFPA 70, or other applicable codes. A power disconnect switch or circuit breaker must be located at the equipment. Check the nameplate for voltage, frequency, and phase requirements. If only 3-phase power is available, connect any single-phase rated equipment to only two wires of the 3-phase line. DO NOT CONNECT the equipment grounding conductor (lead) to the third live wire of the 3-phase line, as this makes the equipment frame electrically HOT, which can cause a fatal shock.

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Always connect the grounding lead, if supplied in a power line cable, to the grounded switch box or building ground. If not provided, use a separate grounding lead. Ensure that the current (amperage) capacity of the grounding lead will be adequate for the worst fault current situation. Refer to the National Electrical Code ANSI/NFPA 70 for details. Do not remove plug ground prongs. Use correctly mating receptacles.

b. Output Cables and Terminals

Inspect cables frequently for damage to the insulation and the connectors. Replace or repair cracked or worn cables immediately. Do not overload cables. Do not touch output terminal while equipment is energized.

Service and Maintenance

This equipment must be maintained in good electrical and mechanical condition to avoid hazards stemming from disrepair. Report any equipment defect or safety hazard to the supervisor and discontinue use of the equipment until its safety has been assured. Repairs should be made by qualified personnel only.

Before inspecting or servicing electrically-powered equipment, take the following precautions:

a. Shut OFF all power at the disconnecting switch or line breaker before inspecting or servicing the

equipment.

b. Lock switch OPEN (or remove line fuses) so that power cannot be turned on accidentally.

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.

Fire And Explosion Prevention

Fire and explosion are caused by electrical short circuits, combustible material near engine exhaust piping, misuse of batteries and fuel, or unsafe operating or fueling conditions.

a. Electrical Short Circuits and Overloads

Overloaded or shorted equipment can become hot enough to cause fires by self destruction or by causing nearby combustibles to ignite. For electrically-powered equipment, provide primary input protection to remove short circuited or heavily overloaded equipment from the line.

b. Batteries

Batteries may explode and/or give off flammable hydrogen gas. Acid and arcing from a ruptured battery can cause fires and additional failures. When servicing, do not smoke, cause sparking, or use open flame near the battery.

c. Engine Fuel

Use only approved fuel container or fueling system. Fires and explosions can occur if the fuel tank is not grounded prior to or during fuel transfer. Shut unit DOWN before removing fuel tank cap. DO NOT completely fill tank, because heat from the equipment may cause fuel expansion overflow. Remove all spilled fuel IMMEDIATELY, including any that penetrates the unit. After clean-up, open equipment doors and blow fumes away with compressed air.

Toxic Fume Prevention

Carbon monoxide - Engine exhaust fumes can kill and cause health problems. Pipe or vent the exhaust fumes to a suitable exhaust duct or outdoors. Never locate engine exhausts near intake ducts of air conditioners.

Bodily Injury Prevention

Serious injury can result from contact with fans inside some equipment. Shut DOWN such equipment for inspection and routine maintenance. When equipment is in operation, use extreme care in doing necessary trouble-shooting and adjustment. Do not remove guards while equipment is operating.

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Jet-Ex 5D / Series 500285 / Generator Set

7. Medical and First Aid Treatment

First aid facilities and a qualified first aid person should be available for each shift for immediate treatment of all injury victims. Electric shock victims should be checked by a physician and taken to a hospital immediately if any abnormal signs are observed.

EMERGENCY

FIRST AID

Equipment Precautionary Labels

Inspect all precautionary labels on the equipment monthly. Order and replace all labels that cannot be easily read.

Call physician immediately. Seek additional assistance. Use First Aid techniques recommended by American Red Cross until medical help arrives.

IF BREATHING IS DIFFICULT, give oxygen, if available, and have victim lie down. FOR ELECTRICAL SHOCK, turn off power. Remove victim; if not breathing, begin artificial respiration, preferably mouth-to-mouth. If no detectable pulse, begin external heart massage. CALL EMERGENCY RESCUE SQUAD IMMEDIATELY.

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Jet-Ex 5D / Series 500285 / Generator Set

Introduction

This manual contains operation and service information for 28.5 V DC Generator sets identified as Jet-Ex 5D. These units are available as stationary, skid- mounted units, or they may be trailer-mounted for portability. Both versions are available with 14 V DC output capability.

Most information in the manual applies to the 28.5 V Jet-Ex 5D in general. Information which applies to options and special equipment are listed in Appendix A.

The primary purpose of the manual is to provide information and instructions to experienced operators, electricians, and mechanics who are not familiar with this equipment. The intent of the manual is to guide and assist operators and maintenance personnel in the proper use and care of the equipment.

Read the instructions before starting the unit. Learn to use the manual and to locate information contained in it.

The Table of Contents, which follows this Introduction, lists all Chapters, Sections, and the paragraph titles within each Section. The location of each listing is identified by Chapter, Section and page number.

Each Chapter is divided into as many Sections as necessary. Sections are always referred to by a combination Chapter-Section number, for example: 2-3 refers to Chapter 2, Section 3.

The material within each Section is divided into main subjects with applicable paragraph headings and sub-headings as required. For example, a portion of the Description Section might logically follow this arrangement and paragraphing:

Section 1. Description

1. Engine, Generator and Controls

a. Interior Panel

(1) Protective devices

a. Overload relay

(2) Contactors

Page numbers do not run consecutively throughout the manual. Each page is identified by the Chapter-Section number in which it appears, and by a page number within the Chapter-Section. Therefore, the first page in each Section is page 1. These identifying numbers appear in the lower, outside corner of each page. Each page also bears a date located in the corner opposite the page number. This date is either that of original issue, or of the latest revision. Any revision to the original text is identified by a heavy black line in the left-hand margin. Illustrations follow a numbering system similar to page numbering. The first Figure in each Section is Figure 1.

All tables, charts, as well as illustrations, are identified by Figure numbers to avoid confusion.

The general location of any particular information can be found quickly by running through the Table of Contents. For example: to locate any adjustment information, a quick look at the Table of Contents shows that “Adjustment / Test” is located in Chapter 2, Section 3, (shown as 2-3).

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Portions of the text are referred to by identifying the paragraph in which the referenced material may be found. When referenced material is located in the same Chapter/Section as the reference, only the paragraph identification is given, for example: (Ref. Para. 1, A) means that the material is to be found in paragraph 1, A, of the same Section.

When referenced material is located in another Chapter/Section, both the Chapter and Section numbers and the paragraph identification are given, for example: (Ref. 1-2, Para. 1, A) means that the referenced material is located in Chapter-Section 1-2, and paragraph 1,a. within that Chapter-Section.

Components shown in illustrations, and the illustrations themselves, are referenced in a similar manner. When this type of reference is made, the item number of the part and the Figure number in which it appears are given, for example: (2, Fig.3) refer to item number 2 in illustration Figure 3 of the same Chapter/Section.

When a referenced figure appears in another Chapter/Section, the reference will include the Chapter/Section number, for example: (2-3, 1, Fig. 4) tells the user that the information is in Chapter/Section 2-3, and to refer to item 1 in Figure 4.

Once a Figure number reference has been established, the Figure number is not repeated and only the item numbers of the parts involved are referenced, for example: “Loosen screw (2, Fig.6) slide out connector (4), and remove brush (6).

When an item number is referenced without a Figure number, it always applies to the last preceding Figure number mentioned in the text.

A collection of manufacturer’s literature is supplied as part of the information package.

If you have any questions concerning your Hobart Ground Power equipment, immediately contact our Service Department by mail, telephone or FAX.

Write: Hobart Brother Company

Ground Power Division

Service Department

1177 Trade Road East

Troy, Ohio 45373

U.S.A.

In U.S.A. Call: (800) 422-4166 (Parts)

(800) 422-4177 (Service)

From Foreign Countries Call: (937) 332-5050 (Parts)

(937) 332-5060 (Service)

FAX: (937) 332-5121

(800) 367-4945 Toll Free in U.S.A.

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Jet-Ex 5D / Series 500285 / Generator Set

Table of Contents

Chapter 1. Description/Operation

Section 1. Description 1

General 1 Special Features 1

Standard 1 Options 1

Orientation 4 Identification 4 Canopy 4 Engine, Generator, and Controls 4

General 4 Engine 4 Generator 9 Rectifier Assembly 9 Ammeter Shunt 9 Contactor 9 Control Box Assembly (Front) 11 Control Box Assembly (Inside) 15 Emergency Sutdown Device 15

Section 2. Preparation for Use, Storage or Shipping 1

Preparation for Use 1

General 1 Inspection/Check 1 Output Cable Requirements and Installation 1

Preparation for Storage 3

General 3 Temporary Storage 3 Long Time Storage 3

Preparation for Shipping 3

Section 3. Operation 1

General 1 Operating the Generator Set 1

Pre-start Inspection 1 Pre-start Instructions 1 Starting The Engine 3

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Generator Operation 3 Deliver Power 3 Stop Operation (Shutdown) 3 Adverse Weather Precautions 4

Chapter 2. Servicing / Troubleshooting

Section 1. Maintenance Inspection/Check 1

General 1 Maintenance Schedule 1

General 1 Maintenance Schedule Check Sheet 1 Time Intervals 1

Engine and Related Components 1 Inspection and Cleaning 3

Section 2. Maintenance Procedures 1

General 1 Lubrication 1

General 1 Lubrication Chart 1 Generator 1 Generator Controls 1 Engine 1

Servicing the Air Cleaner 4

Air Filter Cartridge Removal 4 Air Filter Cartridge Installation 4

Servicing the Fuel Filter 4 Drive Belt Service 4 Engine Cooling System 4

Radiator Cap Removal 5 Rust Inhibitor 5 Antifreeze 5

Battery Service 5

General 5 Battery Location and Accessibility 5 Battery Care 5 Liquid Level (If Battery is not Maintenance Free) 5 Cleaning the Battery 6 Testing a Battery 6

Generator Maintenance 7

General 7 Brush Service 7 Generator Revolving Field Brush Replacement 7

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Section 3. Adjustment/Test 1

General 1 Testing the Generator Set 1

Pre-operational Test Procedures 1 Operational Tests 3

Voltage Regulator Adjustment 4

28.5 Volt Adjustment 4 Line Drop Compensation 4

Section 4. Troubleshooting Procedures 1

General 1 Troubleshooting Chart 1

Description 1 Use of the Troubleshooting Chart 1

Equipment for Troubleshooting 1 Safety Precautions 1 Diagrams 1 Connections and Wiring 1

Section 5. Troubleshooting Charts 1-8

Chapter 3. Major Overhaul

Section 1. Flexible Coupling 1

General 1 Coupling Screws (Routine Coupling Maintenance) 2 Disassembly 3

Separate Engine and Generator 3 Remove Coupling Assembly 3

Coupling Service 4 Coupling Installation and Reassembly of Engine Generator 5

Cleaning 5 Assembly 5

Run-In and Periodic Check 7

Chapter 4. Illustrated Parts List

Section 1. Introduction 1

General 1 Purpose 1 Arrangement 1

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Explanation of Parts List 1

Contents 1 Parts List Form 1

Section 2. Manufacturer’s Codes 1

Explanation of Manufacturer’s (Vendor) Code List 1

Section 3. Parts List 1

Explanation of Parts List Arrangement 1 Symbols and Abbreviations 1

Section 4. Numerical Parts List 1

Explanation of Numerical Parts List 1

Chapter 5. Manufacturer’s Literature

Appendix A. Options / Features

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Jet-Ex 5D / Series 500285 / Generator Set

Chapter 1. Description/Operation

Section 1. Description

1. General

The Jet-Ex 5D units (Figure 1) covered in this manual are diesel engine driven, self-contained generator sets manufactured by Hobart Brothers Company, Ground Power Division, Troy, Ohio U.S.A. A basic unit is identified by a Series Number - 500285 - plus a dash number which defines a specific configuration. The Series Number, plus the dash number, make up the Specification Number.

Part Number Mounting Configuration

500285-001

500285-002

Specification No. 500285-001 covers a trailer mounted unit rated at 28.5 Volts DC output. It is equipped with a sheet metal canopy and four hinged engine compartment doors. Various options are available for use with the basic unit. A few of these options are listed in paragraph 2.B below, but the complete list of options are located in Appendix A.

The basic generator set is designed to generate and deliver 28.5 Volts DC power to an aircraft when its on-board generators are shut down. In addition to providing continuous, regulated power to the aircraft, the unit is also designed for starting any fixed-wing aircraft or helicopter which is equipped with an external 28.5 Volts DC power receptacle.

Special Features

a. Standard

The “Soft-Start” current limiting feature, recommended by most aircraft engine manufacturers, provides the operator with controls to limit the inrush current to the aircraft engine’s starter. When the operator presets this control, the generator will provide constant voltage to the preset current value. The more current is increased beyond the preset current value, the voltage will decrease to a minimum of 14 volts DC, after which the voltage will remain constant as more current may be delivered beyond the preset current value. Limiting inrush current is recommended by most engine manufacturers to protect the aircraft engine’s starter shear section. The current limiting control is continuously adjustable from 300 amperes, which is recommended for helicopter and small turbine starting, to 2000 amperes, required for starting larger aircraft engines when the control is turned fully clockwise.

Trailer Mounted with Cable Trays

Stationary Mounted with Cable Hangers

b. Options (See Appendix A for complete list)

Chapters 1-5 of this manual describes a basic “no options” generator set. Appendix A lists the options available for this unit. Below are the mounting configurations.

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Chapter 1-1 November 1, 2000 Page 2 Revised 07/01

Jet-Ex 5D Generator Set

Figure 1

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Jet-Ex 5D / Series 500285 / Generator Set

Unit with Stationary Mount (500285-002)

Length 68” (172.7 cm)

Width 37” (94 cm)

Height 46” (116.8 cm)

Weight (dry fuel tank) 2400 lbs (1088.6 kg) Approx.

Unit with Trailer and Cable Trays (500285-001)

Length 76.3” (193.8 cm)

Width 67” (170.1 cm)

Height 62” (157.5 cm)

Weight (dry fuel tank) 2670 lbs (1211 kg) Approx.

Ground Clearance 14” (35.6 cm)

Generator

Output Power Rating 17.1 kW

Voltage 28.5 volts DC

Rated Load Capacity 800 amperes continuous at 28.5 volts DC

Starting Current Capacity 2000 amperes maximum

Current Limiting Capability 300 to 2000 amperes, continuously adjustable

Operating Speed 2500 +/-50 RPM

Engine

Manufacturer Cummins Diesel

Model 4BT3.9

Type 4-cylinder, 4-stroke, direct injection

Fuel-Diesel recommended ASTM D975 66T Numbers 1D or 2D

Displacement 238 cubic inches (3.9 liters)

Rated Power at 2200 RPM 100 Horsepower (75 kW)

Oil Capacity (without filter change) 11.5 quarts (10.9 liters)

Coolant Capacity - engine only 7.4 U.S. Quarts (7 liters)

Coolant Capacity - system 4.5 U.S Gallons (17 liters)

Electrical System 12 volt DC, negative ground

Governed Speed at No Load 2500 +/- 50 RPM

Idle Speed 1000 +/- 50 RPM

Fuel Tank Capacity 20.5 U.S. gallons (77.6 liters)

Protective Devices

Generator 28.5 volt over voltage module trips at 32 to 34 volts.

Engine

Water Temp. Switch opens engine circuit at 210º F (98.8º C)

Low Oil Pressure Switch opens at 20 PSI (138 kPa).

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Jet-Ex 5D / Series 500285 / Generator Set

3. Orientation

The radiator end of the Jet-Ex 5D is the front. Right and left are determined by standing at the rear of the unit, facing it. The control panel is located at the rear.

Identification

The Jet-Ex 5D unit is identified by Specification numbers as described in paragraph 1. There may be any number of Generator sets with the same Specification number. Individual machines are identified by a Serial number, assigned to one machine only.

Each generator set has an Identification plate attached inside the control box. This nameplate lists the machines Model No. (Jet-Ex 5D), Specification No., Serial No., and electrical rating.

If any of the options described in paragraph 2.b. are included, they will be listed by name and part number on a separate option nameplate located next to the Identification plate.

Canopy

The standard canopy is a sheet metal enclosure which protects the engine, generator, and electrical controls. It has four hinged doors to provide access for service and maintenance. A bolted on panel at the rear (below the control box) provide access to the rectifier assembly. A Lexan window is mounted in front of the control panel to allow observation of the instruments while protecting them from the weather.

Engine, Generator, and Controls

a. General

The engine (7, Figure 2) and generator (5) are mounted on a welded steel frame (6). A fuel tank support (1) located at the rear of the unit supports the fuel tank (2) and provides a mounting frame for the load contactor (10) and output terminals. The radiator (7, Figure 4) is mounted to the front canopy and frame.

b. Engine

(1) General

The engine used in the Jet-Ex 5D generator set is a Cummins Model 4BT3.9 four-cylinder, four-stroke, direct injection diesel engine. It has a 238 cubic inch (3.9 liter) cylinder displacement and a 17.5:1 compression ratio. Engine firing order is 1-3-4-2.

A spring-loaded relief valve in the oil pump limits maximum pressure in the system. A full-flow oil filter (3, Figure 3) cleans the oil before it enters the oil distributing system. A low oil pressure switch is mounted on the engine block as a protective device. The fuel valve solenoid circuit is wired through the contacts of this switch, which closes at 20 PSI (138 kPa). This prevents the engine from continuing operation if oil pressure will not build up, and also shuts down the engine if oil pressure drops radically during operation.

See the engine operator’s manual for additional engine specifications.

The generator and engine are mounted on a welded steel skid, and are enclosed by a sheet metal canopy that bolts to the skid. Access to engine serviceable components (oil filter, air cleaner, etc.) is through the doors on each side of the machine.

The rear panel is removable and permits access to the rectifier assembly.

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Jet-Ex 5D / Series 500285 / Generator Set

27 1

1. Fuel Tank Support

2. Fuel Tank

3. Control Panel

4. Rectifier Assembly

November 1, 2000 Chapter 1-1 Revised 07/01 Page 5

5. Generator

6. Frame

7. Engine

8. Air Cleaner

Generator Set Components

Figure 2

9. Battery

10. Contactor

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Jet-Ex 5D / Series 500285 / Generator Set

1. Muffler

2. Alternator

3. Oil filter

4. Starter

5. Starter solenoid

Chapter 1-1 November 1, 2000 Page 6 Revised 07/01

Generator Set Components

(Left Side)

Figure 3

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Jet-Ex 5D / Series 500285 / Generator Set

267

1. Fuel filter

2. Air cleaner

3. Throttle control assembly

4. Oil pressure sender

5. Oil pressure switch 20 psi (138 kPA)

6. Water Temp. Switch

7. Radiator

November 1, 2000 Chapter 1-1 Revised 07/01 Page 7

Generator Set Components

(Right Side)

Figure 4

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Jet-Ex 5D / Series 500285 / Generator Set

(2) Cooling fan

The cooling fan on the engine is designed to blow air out through the radiator rather than to draw it in. This prevents hot air, heated by the engine, from entering the generator.

(3) Fuel system

The fuel system consists of a 20.5-gallon (77.6 liters) plastic fuel tank (2, Figure 2) with all the necessary fittings and hoses.

(4) Alternator

The battery charging alternator (2, Figure 3) is rated at 65 amperes. The alternators responsibility is to produce/regulate 12V DC for the generator sets internal electrical system.

(5) Starter solenoid

The starter solenoid (5, Figure 3) is mounted on the starter motor (4), on the right side of the engine.

(6) Exhaust muffler (1, Figure 3)

This muffler helps deaden audible noise from the engine’s exhaust.

(7) Engine faults

The following is a table listing faults which may occasionally occur. Column two of the table explains what happens in the engine’s circuitry when the fault occurs, and column three tells how to return the generator set to service.

ENGINE FAULTS

Engine Fault Condition What This Fault Condition Does

Over Temperature Automatically removes power

from the fuel valve solenoid and shuts down the engine

Low Oil Pressure Automatically removes power

from the fuel valve solenoid and shuts down the engine

Clogged air cleaner or other restriction in the combustion air inlet.

Turns on the air cleaner restriction indicating light (16, Figure 5)

To Put the Generator Set Back

into Service:

a) Let the engine cool down enough to check for low coolant level and or faulty over temperature switch. Restart engine.

a) Let the engine cool down enough to check for low oil level and or faulty oil pressure switch. Restart engine.

a) Replace clogged air filter if needed; clean out the air intake chamber. Restart engine.

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c. Generator

The generator (5, Figure 2) is a multi-phase, synchronous salient pole, revolving field, AC generator whose output is rectified. The output is rectified by a rectifier assembly (4) made up of twelve rectifiers connected into a full wave configuration. The generator is self-excited, receiving excitation from a three phase full wave rectified stator winding. One positive and one negative brush in contact with slip rings supply controlled excitation current from the stator winding through the voltage regulator to the rotating field winding. The voltage regulator, controls the excitation current and maintains a constant output voltage. Access to the brushes is through holes in the anti-drive end bracket. The rotor is supported at the anti-drive end (slip ring end) by a single-row ball bearing. The drive end is connected to the engine fly-wheel by a flexible disc and hub coupling assembly and is supported by the engine main bearings. A radial-blade fan of formed and welded sheet metal construction is mounted on the coupling hub and draws cooling air over the generator windings.

Air flows over the rectifier assembly (4, Figure 2) and then enters through the anti-drive end of the generator and is discharged through openings in the flywheel housing at the drive end. The generator housing assembly, which contains the generator stator, is bolted to the engine flywheel housing.

d. Rectifier Assembly

The Rectifier Assembly (4, Figure 2) consists of two aluminum heat sinks with six diodes on each heat sink. The rectifier assembly converts the AC output of the generator to 28.5 Volts DC.

e. Ammeter Shunt

The ammeter shunt is connected in the generator’s negative output circuit. It supplies a small voltage proportional to output current for operation of the AMMETER (4, Figure 5), and to the current limit circuit of the voltage regulator (2, Figure 6). This shunt is mounted on the negative heat sink of the rectifier assembly (4, Figure 2).

f. Contactor K402 (10, Figure 2)

The load contactor, which is mounted on the right side of the unit below the fuel tank, provides a safe and convenient means of connecting and disconnecting the generator from the load. Initial power for closing the load contactor is supplied by the generator through the spring-loaded momentary contacts of the CONTACTOR CONTROL toggle switch (7, Figure 5). Holding power, to keep the contactor closed, passes through the normally open auxiliary contacts in the load contactor. Output power connection is made by attaching the positive lead to the top terminal of the load contactor, and the negative lead to the negative output terminal located above the load contactor.

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1. TACHOMETER (M403)

2. HOUR METER (M402)

3. VOLTMETER (generator) (M406)

4. AMMETER M407

5. PANEL LIGHTS FUSE (10 amp) (F401)

6. PANEL LIGHTS toggle switch (S405)

7. CONTACTOR CONTROL toggle switch (S408)

8. CONTACTOR CLOSED lamp (DS408)

9. CURRENT LIMITING CONTROL potentiometer (R402)

10. SPEED CONTROL toggle switch (S406)

Chapter 1-1 November 1, 2000 Page 10 Revised 07/01

11. ENGINE ON lamp (DS407)

12. ENGINE START push button switch (S401)

13. ENGINE CIRCUIT toggle switch (S404)

14. ENGINE CIRCUIT FUSE (20 Amp) (F402)

15. WATER TEMPERATURE gauge (M404)

16. AIR FILTER RESTRICTION INDICATOR lamp (DS412)

17. OIL PRESSURE gauge (M405)

18. FUEL gauge (M408)

19. VOLTMETER (battery) (M401)

Control Box Assembly

(Front View)

Figure 5

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g. Control Box Assembly (Front) (Figure 5)

The Control Box Assembly (Figure 5) houses and provides mounting facilities for controls, monitoring instruments, voltage regulator, relays, etc. The box is mounted at the rear of the canopy. Its control are accessible behind a hinged plastic cover.

(1) TACHOMETER (M403)

This instrument receives its operating signal from the alternator to display the engine speed in RPM.

(2) HOUR METER (M402)

The HOUR METER records the total hours of engine operation for scheduling maintenance.

(3) VOLT METER, generator (M406)

The VOLT METER indicates generator output voltage.

(4) AMMETER (M407)

The AMMETER displays generator current output.

(5) PANEL LIGHTS FUSE (F401)

This protects the panel lights circuit.

(6) PANEL/CLEARANCE LIGHTS toggle switch (S405)

The PANEL/CLEARANCE LIGHTS toggle switch turns the panel and clearance lamps on and off.

(7) CONTACTOR CONTROL toggle switch (S408)

The CONTACTOR CONTROL toggle switch is a three-position toggle switch used to close and open the output load contactor. The top CLOSE position is spring-loaded and is held momentarily until the CONTACTOR CLOSED lamp (8) glows, then it is released to the center ON position. In this position the switch provides holding current to the load contactor to keep it closed. Protective devices in the load contactor circuit provide protection against over voltage by opening the load contactor if that condition occurs. In the bottom OFF position, the contactor is opened.

(8) CONTACTOR CLOSED lamp (DS408)

The CONTACTOR CLOSED lamp glows green when the output load contactor is closed.

(9) CURRENT LIMITING CONTROL POTENTIOMETER (R402)

The CURRENT LIMITING CONTROL POTENTIOMETER is used to select the starting current recommended for various aircraft. The current limiting setting is continuously adjustable from 300 to 2000 amperes.

(10) SPEED CONTROL toggle switch (S406)

The SPEED CONTROL toggle switch is a two position switch wired to a throttle solenoid on the engine. In the IDLE position, used for starting, the engine speed is controlled to approximately 1000 RPM. In the Rated RPM position, engine speed is controlled to approximately 2500 RPM.

(11) ENGINE ON lamp (DS407)

The ENGINE ON lamp glows green when the engine is running.

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(12) ENGINE START push button switch (S401)

The ENGINE START push button switch is a momentary contact switch which closes the starter solenoid (5, Figure 3) circuit and cranks the engine. This switch is operable only when the ENGINE CIRCUIT toggle switch (13, Figure 5) is held in its top spring-loaded START position.

(13) ENGINE CIRCUIT toggle switch (S404)

The ENGINE CIRCUIT toggle switch must be held in the top START position and the ENGINE START push button (12) must be depressed TO START THE GENERATOR SET. When released from its top START position after the engine starts, this toggle switch will return to center RUN position. The ENGINE ON lamp (11) will glow as long as the switch is in RUN position. In the bottom STOP position, this switch will stop the engine and the lamp (11) will go out.

(14) ENGINE CIRCUIT fuse (F402)

The ENGINE CIRCUIT fuse (20 amp.) protects the engine circuitry.

(15) WATER TEMPERATURE gauge (M404)

The WATER TEMPERATURE gauge indicates the engine coolant temperature and is actuated by a temperature sender (6, Figure 4) mounted on the engine’s water jacket.

(16) AIR FILTER RESTRICTION lamp (DS412)

The AIR FILTER RESTRICTION lamp glows red when the air filter needs changed.

(17) OIL PRESSURE gauge (M405)

The OIL PRESSURE gauge displays the pressure in the engine’s lubrication system. It is operated by a sender (4, Figure 4) mounted on the engine block.

(18) FUEL gauge (M408)

The FUEL gauge indicates the amount of fuel remaining in the fuel tank.

(19) VOLTMETER (battery) (M401)

The battery VOLTMETER indicates the voltage of the engine’s 12 volt DC electrical system.

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Chapter 1-1 November 1, 2000 Page 14 Revised 07/01

1. Over voltage relay (K403)

2. Voltage regulator (VR402)

3. Excitation rectifiers (CR417 & CR418)

4. Control windings fuses (10 Amp.) (F406 - F408)

5. Voltage build-up fuse (10 Amp.) (F405)

6. Voltage regulator fuse (10 Amp.) (F403)

7. Throttle solenoid fuse (20 Amp. Slo-Blo) (F409)

8. Control Panel Lights (DS401, DS402 & DS420)

9. Rectifier Harness Connector (J43)

10. Engine Harness Connectors (J46 & J47)

11. Rectifier (CR401)

12. Capacitor (C403)

Control Box Assembly

(Interior View)

Figure 6

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h. Control Box Assembly (Interior)

Numbers in parentheses below can be crossed referenced in Figure 6

(1) Over voltage relay (K403)

The over voltage relay is a solid-state protective device on a printed circuit board. A normally closed relay in the circuit is wired into the load contactor coil circuit. An over voltage condition causes the relay contacts to open, which in turn prevents the contactor from closing, or opens the load contactor and discontinues the power delivery. The over voltage module is adjusted to trip at 32 to 34 volts DC in .5 seconds ±.2 seconds.

(2) Voltage regulator (VR402)

The voltage regulator is a solid-state device which regulates the 28.5 Volts DC generator output after the voltage is built up.

(3) Excitation rectifiers (CR417 and CR418)

Two diode bridge rectifiers, convert an AC voltage from the generator armature to the DC voltage needed for the generator revolving field.

(4) 3 Control Windings Fuses—cartridge-type—10 amp each (F406 - F408)

(5) Voltage Build-up Fuse—cartridge-type—10 amp (F405)

(6) Voltage Regulator Fuse—cartridge-type—10 amp (F403)

(7) Throttle Solenoid Fuse—cartridge-type—20 amp (F409)

(8) Control Panel Lights (DS401, DS402, & DS420)

Three control panel lights provide illumination for instruments and controls.

(9) Rectifier Harness Connector (J43)

Provides connections between the control box and the Rectifier assembly.

(10) Engine Harness Connectors (J46 & J47)

Provides connections between the control box and engine compartment components.

(11) Rectifier (CR401)

Automatic Voltage Build-Up.

(12) Capacitor (C403)

A 100mfd, 350V DC Capacitor, that filters the DC excitation volts produced by rectifiers CR417 and CR418.

i. EMERGENCY SHUT DOWN DEVICE

In addition to the other devices provided by the engine manufacturer, an engine shutdown feature is added by Hobart Brothers. Since diesel engines typically require several minutes of running at idle speed before shutdown, this push button switch is intended for use in emergencies only.

(1) EMERGENCY SHUTDOWN push button switch S413

This push button switch has one purpose: To provide immediate shut off of the generator set by disconnecting power to the fuel solenoid through the control box. Once pushed, it must be pulled back out to restart the generator set. It is located on the rear panel, below the control box.

To operate the EMERGENCY SHUTDOWN push button switch:

Push button in until engine stops or until button travel stops.

Pull the button back out to reset.

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Section 2. Preparation for Use, Storage or Shipping

1. Preparation for Use

a. General

The generator set is shipped with an empty fuel tank. After the fuel tank is filled and the generator set is inspected, the generator set is ready for use.

CAUTION

Read operating instructions in Section 1-3 before operating the unit.

b. Inspection/Check

Inspect the unit completely prior to operation.

(1) Remove crating, blocking, banding, ties, and other securing and protective material.

(2) Inspect exterior for shipping damage such as broken glass, damaged sheet metal, etc.

(3) Open canopy doors and inspect interior for foreign material such as rags, tools or shipping

papers.

(4) Check the fuel and coolant systems, also the oil hoses and their connections for visible leaks. If

leaks are discovered, correct by tightening hose clamps, tube fittings, etc., as required.

(5) Check security of attaching and retaining hardware.

(6) Check the following for sufficient quantity.

a. Fuel

Fuel tank capacity is 20.5 gallons (77.6 liters).

b. Engine coolant

The radiator cap is located under the hinged door, at the front of the unit, on the top canopy. The coolant level should be approximately one inch below the filler neck to allow for sufficient capacity for coolant expansion.

CAUTION

Be sure the cooling system antifreeze solution is adequate to protect below lowest temperature expected.

c. Engine lubricating oil

The oil level dipstick is located on the left side of the engine. Refer to the Engine Manufactures User’s handbook for oil recommendations.

c. Output Cable Requirements and Installation

Jet-Ex 5D units are normally supplied with a 30ft. generator-to-aircraft output cable. This output cable consists of two single conductor 4/0 cables.

(1) Cable requirements

Cable length is determined by the customer’s requirements. It is recommended that the cable be no longer than 30 feet (9 m). It should be two conductor with lug-type terminals on one end and an AN-2551 plug connector on the other.

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The recommended cable size for 28.5 volt DC is determined by the maximum starting load

amperage expectations. A maximum starting load of 1500 amps. requires two single conductor 4/0 cables. A maximum starting load of 600 amps. requires two single conductor 2/0 cables.

NOTE: Some operators may wish to add a second cable assembly with MS-25019 plug connector for

starting aircraft such as Jetstar and Sabre liner.

(2) Cable connection (See Figure 1)

Open and remove the right rear door and the panel below the door. Set aside.

Loosen the output cable clamp and thread the lugged end of the output cable through the

opening in the right side of the unit.

Connect the POSITIVE cable lead to the output terminal on the contactor. Connect the

NEGATIVE cable lead to the negative output terminal located above the load contactor. ALWAYS place the lead under the flat washer shown.

Negative Cable Connection

Chapter 1-2 November 1, 2000 Page 2

Positive Cable Connection

Output Cable Connections

(Right Side of Unit)

Figure 1

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Tighten the cable clamp and install the lower panel, and the door.

Store cables in cable tray or on hangers on side of canopy if fenders are not used.

Preparation for Storage

When a generator set is to be stored or removed from operation, special precautions should be taken to protect the internal and external parts from rust and corrosion.

a. General

The unit should be prepared for storage as soon as possible after being removed from service.

Storage should be in a building which is dry and which may be heated during winter months.

b. Temporary Storage

When storing the unit for one month, prepare as follows:

(1) Lubricate the unit completely in accordance with instructions in Section 2-2; Para. 2. This will

include changing engine oil, and filter elements.

(2) Make certain the cooling system antifreeze solution is adequate to protect below the lowest

temperatures expected during the storage period.

(3) Clean the exterior of the engine with fuel oil and dry with clean cloths and compressed air.

(4) Seal all engine openings. Use a vapor and waterproof proof material that is strong enough to

resist puncture damage from air pressure.

c. Long Time Storage

(1) Engine Protection

The Jet-Ex 5D generator set may be stored for long periods if the engine is given proper protection from rust and corrosion. Refer to the Engine Manufactures Users Handbook for proper procedures to be followed.

(2) Generator Protection

To protect the generator and other electrical components, the complete unit should be packaged, using moisture proof packaging and sealing materials. Place packages of moisture absorbing chemicals, such as silica-gel, in the unit before packaging.

(3) Battery Care

Remove battery and store in a cool dry place. Store the battery on wood rather than directly on cement or metal.

Preparation for Shipping

Prepare the unit for shipping as follows:

Disconnect battery cables.

Seal all engine openings to prevent the entrance of water, dirt, and dust.

Drain all fuel from tank and fuel lines as required by carrier rules.

Crate the unit solidly to prevent damage to instruments, glass, and sheet metal.

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Section 3. Operation

1. General

This section contains information and instructions for the safe and efficient operation of the generator set. Operating instructions are presented in a step-by-step sequence of procedures to be followed in supplying power to an aircraft.

NOTE: Read ALL of the operating instructions before attempting to operate the equipment.

WARNING

Ear protection may be necessary when working close to this equipment.

Operating the Generator Set

a. Pre-start Inspection

(1) Always be sure there is sufficient oil and coolant in the engine.

(2) Be sure the fuel shutoff valve is open. The valve is located at the fuel tank outlet. Observe the

fuel gage. Make certain of sufficient fuel to complete the job to be done.

(3) If the unit is trailer mounted and is not connected to a tow vehicle, be sure the parking brake is

applied and that the drawbar is raised and locked in the vertical position.

(4) Open the engine compartment doors and inspect interior for rags, tools, and foreign material.

b. Pre-start Instructions

In all probability, the unit will be moved from one location to another many times during its lifetime of service. Therefore, the following steps should be taken to optimize maximum efficient operation.

(1) Check the supply of fuel, crankcase oil and radiator coolant. See the Engine Manufactures

User’s Manual for specifications.

(2) Inspect the unit thoroughly to be sure it is in proper working order. Check all fuel lines and wire

connections to be certain they are secure. Tighten any loose screws, nuts or bolts.

(3) Wipe off the entire unit and blowout air passages, control box, and other hard to reach places

with compressed air not over 25 psi (172 kPa).

(4) Make sure that no loose bars, tools, parts, etc., are in or on any part of the engine, as they could

cause serious damage to the engine, generator, or personal injury to anyone standing nearby.

(5) If the unit is operated indoors, make sure that an exhaust line is properly connected to the

engine exhaust system, and discharged outside. Avoid short bends or reduction in line sizes in exhaust pipes. Locate the unit so as to necessitate the shortest possible exhaust line to insure the least amount of back-pressure on the engine. Back-pressure can cause engine damage and loss of power.

(6) Check the electrical system to make sure the connections are secure and properly connected.

(7) If applicabled, check the battery electrolyte level. The factory installed battery is maintenance

free.

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1. TACHOMETER M403

2. HOUR METER M402

3. VOLTMETER (generator) M406

4. AMMETER M407

5. PANEL LIGHTS FUSE (10 amp) F401

6. PANEL LIGHTS toggle switch S405

7. CONTACTOR CONTROL toggle switch S408

8. CONTACTOR CLOSED lamp DS408

9. CURRENT LIMITING CONTROL potentiometer R402

10. SPEED CONTROL toggle switch S406

Chapter 1-3 November 1, 2000 Page 2

11. ENGINE ON lamp DS407

12. ENGINE START push button switch S401

13. ENGINE CIRCUIT toggle switch S404

14. ENGINE CIRCUIT FUSE (20 Amp.) F402

15. WATER TEMPERATURE gauge M404

16. AIR FILTER RESTRICTION INDICATOR lamp DS412

17. OIL PRESSURE gauge M405

18. FUEL gauge M408

19. VOLTMETER (battery) M401

Control Box Assembly

(Front View)

Figure 1

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c. Starting The Engine (Figure 1)

Make sure that all Prestarting Instructions have been carried out, and reference to Initial Preparation for Use has been checked for operating details.

(1) Check engine oil, fuel and coolant levels.

(2) Check AIR CLEANER SERVICE INDICATOR lamp (16, Figure 1). If lamp is glowing, replace air

filter element and/or remove other objects that obstruct air flow.

(3) Place SPEED CONTROL toggle switch (10) in the IDLE (down) position.

CAUTION

(4) Hold engine ENGINE CIRCUIT toggle switch (13) in START position.

(5) Press and hold ENGINE START push-button switch (12). Release as soon as engine starts.

(6) Release engine ENGINE CIRCUIT toggle switch (13) to RUN position when oil pressure builds

up.

(7) Observe engine RPM on the TACHOMETER (1), idle speed should be 1000 RPM +/- 50 RPM.

(8) Allow engine to warm up before applying a load.

If the engine stalls or falters in starting, wait three or four seconds before re-engaging starter. This will prevent possible damage to starter or the engine. DO NOT Operate the starter for periods longer than 15 seconds at a time. An interval of at least two minutes should be allowed between cranking periods to protect the starter from overheating.

WARNING

The engine’s entire exhaust system will get very hot and cause severe burns if touched.

d. Generator Operation (Figure 1)

(1) Place speed control switch (10) in RATED RPM (up) position. Engine speed will be 2500 RPM,

and the generator will automatically build up to produce rated voltage.

(2) Adjust CURRENT LIMITING CONTROL potentiometer (9) if necessary. Refer to Proper Aircraft

documentation for proper setting.

e. Deliver Power

(1) Connect output cable to AIRCRAFT.

(2) Hold CONTACTOR CONTROL toggle switch (7) in CLOSE position. Release to ON position as

soon as green CONTACTOR CLOSED lamp (8) comes on.

f. Stop Operation (Shutdown)

(1) Normal Conditions

a. When power delivery is completed (aircraft discontinues drawing current), place

CONTACTOR CONTROL toggle switch (7) in OFF position. The CONTACTOR CLOSED lamp (8) should go off to indicate load contactor has opened and power is no longer available at the aircraft.

b. Place SPEED CONTROL toggle switch (10) in IDLE (down) position. Allow engine to run for

2 to 3 minutes.

c. Disconnect output cable from aircraft receptacle and store cable in cable trays or on cable

hangers as the case may be.

d. Place ENGINE CIRCUIT toggle switch (13) in STOP position.

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CAUTION

THE BATTERY WILL DRAIN if the ENGINE CIRCUIT toggle switch (13), is not

placed in STOP position after shutdown,

(2) Emergency Conditions

To prevent personal damage or damage to generator set, use of the EMERGENCY SHUT DOWN (E-STOP) push button switch will provide immediate shut down of the engine. Once pushed in, the E-STOP button must be pulled back out to restart the generator set.

Depress E-STOP button; engine will shut down

Pull E-STOP button back out to restart.

g. Adverse Weather Precautions

(1) Cold weather operation

Operation of this engine-driven unit at sub-zero temperatures requires special precautions and extra servicing from both operation and maintenance personnel, if poor performance or total functional failure is to be avoided. Consult the Engine Manufactures Maintenance and Operator’s Manual and recommendations below.

a. Fuel system

Keep system clean and free from water which may collect in a low spot in the fuel line and freeze, plugging the line. Fuel tanks should be kept FULL to prevent water condensation from the air above the fuel.

b. Fuel Storage

Keep fuel storage tanks or drums as full as possible to avoid condensation of moisture from the air above the fuel. After filling or moving fuel containers, allow fuel to settle before using. Never draw fuel from the extreme bottom of the container. Strain all fuel to remove any foreign matter. When operating outdoors, take steps to prevent the entry of snow, water, and ice into the fuel containers.

c. Cooling system

Prior to cold weather, drain and flush the cooling system to remove accumulations of rust and sediment. Mix and add antifreeze solution, check the cooling system connections for leaks. Add a can of rust inhibitor to the radiator when system is winterized. This will keep system cleaner and furnish lubrication for the water pump.

d. Lubrication

Drain the crankcase (preferably when warm after running) and fill with a lighter grade of oil. See Engine Oil Recommendations chart in the Engine Manufactures User’s Manual for recommended viscosity for various atmospheric temperatures. In cold weather, drain oil more frequently. Water condenses and collects quickly, mixes with the oil and increases deposits to form a sludge. Check oil frequently for this condition. Water in crankcase may freeze and cause serious damage to the oil pump, or shut off the oil supply.

e. Electrical system

In cold weather, the most efficient electrical system is needed to start the cold engine. Check the entire system for loose connections or indication of bad wiring or shorted conditions.

f. Battery

Battery efficiency decreases sharply with lower temperatures. Make sure of full charge before attempting to start engine in sub-zero conditions.

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(2) Operation in Hot and Humid Conditions

a. Cooling system

Maintain a more frequent check of the coolant level in the radiator.

(3) Operation in Extremely Dusty Conditions

If unit is to be operated under dusty, out-of-door conditions, place it in a sheltered area. Take advantage of any natural barriers which may offer protection from blowing dust. If the installation is more than temporary, erect a protection shield.

a. Fuel system

Change the fuel filter at prescribed intervals and keep fuel containers covered and protected against dust entry.

b. Air Cleaner

This filter needs more frequent attention under dusty conditions. Check Air Filter Restriction Lamp located on control panel daily.

c. Crankcase Oil

The crankcase oil level will require close attention. Dusty conditions tend to load crankcase oil with dirt. Watch for dirty and gritty oil conditions, and change oil more frequently as required.

(4) Operation in Salt Water Areas

a. Canopy

Wash canopy regularly to remove salt film. Repaint any damaged places and oil the hinges regularly.

b. Covering

To protect the engine and generator as much as possible from salt water atmosphere, keep the side doors on the canopy closed, when not in use. It is advisable to keep the unit covered with a tarpaulin, if available, when not in use. Salt water should be wiped from the engine, and all terminals and connections in the electrical system wiped dry. Keep all linkage oiled.

c. Brushes

The brushes of the generator should be inspected regularly to make certain that they are free in the holders. Lift the brushes in the brush holders about every two days to insure their freedom to slide within the holder. Wipe dry all the parts that can be reached, and use compressed air, if available, to dry the parts of the generator that cannot otherwise be reached. See MAINTENANCE for brush care.

d. Field coils

The fields should be dried as thoroughly as possible. If they have become damp, proceed with recommended procedure in MAINTENANCE section.

e. Battery terminals

Thoroughly clean the battery terminals and connections. Coat terminals and connections with petroleum jelly to retard corrosion.

(5) Miscellaneous

Once a month, oil the hinged plexiglass cover.

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Chapter 2. Servicing / Troubleshooting

Section 1. Maintenance Inspection/Check

1. General

To make certain that generator set is always in good operating condition, it must be inspected, maintained, and lubricated regularly and systematically.

WARNING

Stop operations at once if a serious or possibly dangerous fault is discovered.

Maintenance Schedule

a. General

Figure 1 provides a suggested schedule for periodic checks and services. Refer to Section 2-2 for lubrication requirements.

b. Maintenance Schedule Check Sheet

It is strongly recommended that the customer use a maintenance schedule check sheet. The check sheet will provide a record of maintenance specific operation.

c. Time Intervals

The schedule is based on both hours of operation and calendar intervals. These two intervals are not necessarily the same. The calendar period is included to make certain services are performed regularly when equipment is being operated infrequently, or at manufacturer’s recommendations. Perform all services on a “whichever comes first” basis.

Engine and Related Components

Refer to the Engine Manufactures User’s Handbook for detailed engine maintenance information.

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8 hrs.

First

Service

Recommended Service Intervals

Engine

Check oil level Check coolant level X Check fuel quantity Check gages and instruments for proper operation Drain Fuel Pre-Filter Element X X Change engine oil X X Change oil filter X X Check and tighten drive belts X X Clean and inspect exterior of radiator X Check exhaust system X Check cooling system concentration X Atomizer Maintenance X Replace fuel filter X Clean engine Check valve tip clearance, adjust if necessary X X

Electrical System (12V DC)

Check lights X Check charging rate X Check battery state of charge (alternator) X Check wiring and connections X Check starter motor X Check battery terminals and connectors X

Electrical system (28.5V DC)

Check indicating light Check operation of all instruments, meters, etc. X Check generator brushes for length, cleanliness

and free operation Check slip rings for smoothness and cleanliness X Check the entire unit X Check overvoltage protection X Check all wiring connections X

Trailer (500285-001 only)

Lubricate X Check tire inflation X Check and adjust wheel bearings X Lubricate wheel bearings X Check brake tension X

20/40

Hrs

Daily 250 hrs.

6 Months

X X X X

500 hrs.

or 12

Months

2000

Hours

Inspection/Check/Maintenance Schedule

Chapter 2-1 November 1, 2000 Page 2 Revised 03/01

Figure 1

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4. Inspection and Cleaning

Every day, check for oil, coolant, or fuel leaks. Also check for loose electrical connection. Check oil pressure with engine running at rated RPM (2500). Do not operate engine if oil pressure is less than 20 psi (138 kPA). Wipe accumulated water off from all electrical connections and instruments. Make sure that the battery voltmeter reads proper voltage.

Every week, wipe off accumulated dust, dirt and oil from the engine and generator. Check all parts for loose connections and wear. If arcing has occurred at any electrical connections, recondition them and securely refasten. Check engine oil and coolant levels.

Every month, check generator for amperage and voltage output. Blow out generator windings with compressed air, not over 25 psi (172 kPa) pressure or remove with a suction-type cleaner with a non-metallic nozzle. If windings should become slightly damp, use space heaters or electrical light bulbs to effectively dry out the windings. If dampness is excessive, apply external heat under a canvas cover, well vented. Heating should not exceed 194º F (90º C).

Pound out any dents in the canopy. Sand, prime, and repaint any dented or rusted spots.

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Section 2. Maintenance Procedures

1. General

A suggested Maintenance Schedule is provided in Section 1 of this Chapter. Each step of the schedule is also covered in general in Section 1. This Section covers maintenance in more detail where necessary.

WARNING

Stop operation immediately if a serious or possibly dangerous fault is discovered.

Lubrication

a. General

Proper lubrication is one of the most important steps in good maintenance procedure. Proper lubrication means the use of correct lubricants and adherence to a maintenance time schedule. Lubrication points, frequency of lubrication, and recommended lubricants are part of the time schedule.

b. Lubrication Chart

Lubrication points are illustrated and identified by name on Lubrication Chart, Figure 1. Number symbols used to designate the kind of lubricant required and the specification recommended are identified in Figure 2. Letter symbols used to designate the normal lubrication period are identified in Figure 3.

c. Generator

The 28.5 volt DC generator requires NO lubrication. The armature is sealed at the factory for lifetime, maintenance free operation. The front end of the armature is supported by the engine main bearings.

d. Generator Controls

Generator controls and instruments require no periodic lubrication. A few drops of oil may be required on the clear plexiglass cover hinge occasionally to insure free and quiet operation.

e. Engine

Although the engine and its accessories require no more attention than any other similar installation, they still inherently require a major portion of the generator set lubrication and maintenance. Recommendations regarding engine lubrication have been taken from the Engine Manufacturers Users Manual.

(1) Lubrication Schedule

Time schedules indicated on the Lubrication Chart, Figure 1, are approximate. They are based on average operating conditions. It may be necessary to lubricate more frequently under severe operating conditions such as: low engine temperature, high oil temperature, intermittent operation, or dusty conditions. However, time intervals should not exceed those indicated in the chart without careful evaluation.

The use of quality lubricating oil, combined with proper oil drain and filter change intervals are important factors in extending engine life.

(2) Oil Specification

Lubricating oils must be equal to the U.S. Ordnance specification MIL-L-46152 or MIL-L-2104C. See Engine Manufactures user’s handbook for recommended oil viscosity.

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Check oil daily Check crankcase oil daily; change 200 hours. Change oil filter after 200 hours.

Chapter 2-2 November 1, 2000 Page 2 Revised 08/01

Lubrication Chart

Figure 1

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Symbol Name Specification Notes

Grease, Automotive and Industrial

Oil, Engine, Heavy Duty MIL-L-46152 or

Grease, Automotive Military MIL-G-10924B Wheel bearings

Symbol Time Interval

D 10 hours or Daily

BW 100 hours or Biweekly

M 200 hours or Monthly

BM 400 hours or Bimonthly

SA 800 hours or Semiannually

Federal VV-G-632 Sinclair LItholene Industrial

No.2; Mobile-Mobilplex 47 or equivalent.

See Cummins Engine

MIL-L-2104C

Lubricants

Figure 2

User’s Handbook for recommended oil viscosity

Symbols and Time Intervals

Figure 3

(3) Change lubrication engine oil

Oil should be changed once after the first 20/40 hours of operation and then once every 250 hours of operation thereafter. The generator set is equipped with an hourmeter which records actual engine operating time. The ideal time to change oil is soon after a power delivery run when the engine is at operating temperature.

NOTE: If lubricating oil is drained immediately after the unit has been run for some time, most of the

sediment will be in suspension and oil will drain readily without clinging to internal surfaces.

CAUTION

DO NOT use solvents as flushing oils in running engines.

NOTE: Change the oil filter each time the oil is changed (250 hours).

(4) Change oil as follows:

a. Provide a container for catching used oil. Capacity should be greater than 2 gallons.

b. Remove drain plug located in oil pan. Allow sufficient time for oil to drain from valve train,

timing gear case, etc., before reinstalling plug.

NOTE: Change oil filter while oil is draining.

Change oil filter as follows:

c. Place a container under the oil filter to catch oil drippings.

d. Loosen filter with a special oil filter removal wrench. Several types are available. Discard oil

filter.

e. Coat the gasket on the new filter with oil.

f. Place the new filter in position on the cylinder block and spin on until the gasket contacts the

adapter face; then hand tighten another 1/2 turn. Do not over-tighten.

g. Clean drain plug and reinstall. DO NOT over-tighten.

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h. Remove filler cap on valve cover and refill crankcase with fresh clean oil, of proper

specification and viscosity (see Para. 2, E, (2) and Figure 2). Seven quarts are required when oil filter is changed.

i. Replace oil filler cap.

j. Start engine and allow it to idle. Oil pressure should come up to normal quickly. Check for oil

leaks at filter and drain plug.

k. Stop engine. Allow several minutes for oil to drain to crankcase, then check oil level. It should

be at FULL mark on dipstick.

l. Check hourmeter and record time and date of oil change for maintenance reasons..

Servicing the Air Cleaner

The air cleaner is a dry type with a “C” flow cartridge. A definite time schedule for changing the filter cartridge cannot be determined because of varying operating conditions, therefore an air restriction indicator lamp (Sect. 1-3; 16, Figure 1) is mounted on the control panel. Change the filter when the red indicator lamp glows.

a. Cartridge Removal

(1) Open right rear canopy door to gain access to the air cleaner.

(2) Using a 5/16 socket, loosen the clamps which surround the air cleaner and secure it to the air

filter bracket.

(3) Loosen and remove the clamp and air cleaner from the intake hose.

CAUTION

DO NOT attempt to clean or re-use old cartridge.

b. Cartridge Installation

(1) Attach the new air filter cartridge to the intake hose and tighten the clamp.

(2) Secure the air filter cartridge to the air filter bracket with the same two large clamps. DO NOT

over-tighten.

Servicing the Fuel Filter

Refer to the Engine Manufacturers User’s Handbook for instructions on removal and replacement of fuel filter elements.

Drive Belt Service

Check all drive belts and adjust if necessary each 250 hours. Refer to Engine Manufacturers User’s Manual for proper procedures.

Engine Cooling System

NOTE: Refer to the Engine Manufacturers User’s Manual for detailed instructions on servicing the engine’s

cooling system.

In all weather situations, the engine coolant should always contain a solution of 50% water and 50% antifreeze (ethylene glycol). Rust inhibitors are recommended in the coolant as rust corrosion can still occur.

WARNING

Never remove the cap from a hot radiator. The radiator cap should not be removed unless the engine temperature is 140º F (60º C) or below.

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a. Radiator Cap Removal

Cover the cap with a thick cloth and turn it slowly counterclockwise to the first stop. When pressure is completely released, press downward and finish removing cap.

CAUTION

b. Rust Inhibitor

Use only a corrosion inhibitor that is compatible with aluminum. Do not use inhibitors labeled as “acid neutralizer.”

c. Antifreeze

A permanent type (Ethylene Glycol) antifreeze is recommended for use in the cooling system. The coolant, when mixed as equal parts of water and the recommended antifreeze, will provide protection to -35º F.

Battery Service

a. General

A 12-volt battery supplies power for operation of the engine electrical system, clearance and panel lights, and for building up generator voltage. The battery supplied with a new unit is a maintenance free type. Some of the following topics apply to non-maintenance free type battery, which requires additional maintenance such as checking liquid levels.

b. Battery Location and Accessibility

The battery is located on a tray mounted to the left front frame. The battery is easily accessible for service by opening the left front door and removing the lower panel below the door.

c. Battery Care

(1) Never allow a battery which has been removed from a unit to sit on concrete, ground, or metal,

unless proper insulation is provided. A wooden platform or board will provide sufficient insulation.

(2) Maintain stored batteries in a charged condition,

(3) Be sure battery is fastened securely in their compartment to avoid damage from vibration.

(4) If applicable, maintain battery fluid at proper level (see below).

(5) Keep battery terminal posts and lead cable connectors clean.

DO NOT add coolant to an extremely hot engine. This can result in a cracked block or cylinder head.

WARNING

Never allow sparks or open flame near battery. Avoid spilling electrolyte on hands or clothing.

d. Liquid Level (If battery is not a maintenance free type)

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. Acid should never be added except by skilled battery personal.

CAUTION

Never add any special battery dopes, solutions, or powders.

NOTE: It is especially important to keep the battery at full charge for cold weather operation. Add distilled water

to the battery in freezing temperatures only when the engine is to operate for several hours. Thoroughly

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mix the water and the electrolyte, or damage to the battery will result from the water freezing.

e. Cleaning the Battery

If the top of the battery is dirty, it may be cleaned with a brush dipped in ammonia or soda solution. Disconnect lead connectors from battery posts. Vent plugs should be tightened to prevent cleaning solution from entering cells. Clean battery as required, using brush and cleaning solution. Flush off the battery with clean water. Special terminal cleaning tool. Make certain that vent holes in filler caps are not clogged.

f. Testing a Battery

Tests are made on a battery to determine the state of charge and also its condition. The results of these tests show whether the battery is good, needs recharging, or must be replaced. If a battery has failed, is low in charge, or requires water frequently, the reason for the condition must be found and corrected. Visually inspect the battery before testing, to determine if it has been damaged. Moisture on the outside of the case, or low fluid level in one or more cells indicates possible battery damage (cracked case, etc.). The battery may be tested by two methods. A battery-starter tester may be used to determine the battery’s ability to deliver current. A battery hydrometer test determines the charge condition of the battery.

(1) Battery-Starter Tester

Connect battery to the tester according to instructions furnished with the instrument. Test battery according to tester instructions. If the test determines that the battery has acceptable voltage, this indicates that the battery has output capacity and will accept a charge if required.

(2) Hydrometer

Remove filler caps and check the specific gravity of the electrolyte in each cell. If specific gravity is 1.230 or below, add water if necessary and charge the battery until it is fully charged. A fully charged battery will give a specific gravity reading of 1.265 to 1.285. The specific gravity of a fully discharged battery may range from 1.140 down to 1.120.

NOTE: The battery is fully charged when all cells are gassing freely, and the specific gravity ceases to

rise for three successive readings taken at hourly intervals.

a. If the battery starter test indicated that battery voltage was below the acceptable voltage

value, test each cell with the hydrometer. If the difference in specific gravity readings between any two cells is 50 points (0.050) or more, the battery isn’t satisfactory for service and should be replaced.

A-Leads

B-Brusholder Caps

Generator Revolving Field Brushes

Figure 4

C-Brusholder

Chapter 2-2 November 1, 2000 Page 6 Revised 08/01

D-Brush

E-Slip Rings

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8. Generator Maintenance

a. General

The only maintenance service required for the generator will be brush replacement, slip ring cleaning, etc.

b. Brush Service

If inspection reveals that brushes are gummy or sticking in the brush holders, they should be removed and cleaned. Clean both the brushes and brush holders. Use a good, SAFE, commercial cleaner. DRY ALL PARTS THOROUGHLY. Be sure brushes can move freely in brush holders.

CAUTION

DO NOT use a flammable solvent. DO NOT use steam cleaner, or soaps and detergents under pressure.

c. Generator Revolving Field Brush Replacement (See Figure 4)

(1) Disconnect leads (A, Fig. 4) from connectors on brush holder caps (B).

(2) Remvoe brush holder caps (B) from brusholder.

WARNING

(3) Lift brush (D) from brush holder (C) for inspection. If brushes are worn unevenly or are shorter

than 7/16 inch (11 mm), replace them.

(4) Inspect slip rings whenever brushes are removed for servicing brushes or brush holders. Note

surface conditions of rings. Surface should appear smooth and clean. Scoring or roughness of slip rings may be caused by grit or abrasive substance in brushes, or by oil on the rings. Moderately rough slip rings can be smoothed by holding grade 00 flint paper against their surface while the rings are revolving slowly. If the rings are badly scored, the unit must be sent to an overhaul facility for repair. After cleaning slip rings, blow dirt and grit out of the unit with compressed air. Do not use over 25 psi (172 kPa) air pressure to blow dirt out.

(5) Slip new brushes into brush-holder guides, and place caps on top, and screw them into the

guides to a “bottomed” position. The spring attached to the brush will determine the pressure at which the brush contacts the slip rings.

(6) To fit new brushes to the slip rings, lay a strip of No. 00 sand- paper, smooth side down, on slip

ring surface, and draw the sandpaper in the direction of rotation of the slip ring, lifting the brush on the return stroke. Continue until the brushes have same curvature as the slip rings. Blow all carbon dust out of the machine using not over 25 psi (172 kPa) air pressure.

When removing the lead wires, do so one at a time and replace each brush accordingly, to insure that the lead wires are put pack onto the proper brushes.

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Section 3. Adjustment/Test

1. General

The adjustments and test procedures presented below are required after major repairs, parts replacement, or long storage.

Testing the Generator Set

Test values listed below will result when the generator set is operating properly. If your test results are not within the limits shown, perform the applicable troubleshooting procedures given in Chapter 3.

If major repairs have been made or if critical components have been replaced, make sure that the applicable adjustments have been made before testing the generator set. Adjustment procedures are described in Para. 3 of this Section.

a. Pre-operational Test Procedures

(1) Open engine compartment doors and inspect the interior for rags, tools, and other foreign

materials.

(2) Check engine oil level.

(3) Check coolant level.

(4) Check battery water level (if required)

(5) Check for sufficient fuel.

(6) Check drive belts. Each belt should have approximately 1/2 inch (13 mm) slack.

(7) Inspect all wiring for possible trouble spots such as loose wires or terminals, frayed insulation,

obvious shorts, etc.

(8) Check panel lights, panel light switch, and fuse.

(9) Connect cables from generator output terminals to a load bank. The output cable consists of two

single conductor cables not more than 30 feet (9 m) long. The diameter size of each of these two cables is determined by the maximum starting current expectations:

Use No. 2/0 cable for 600 amp. maximum starting current

Use No. 4/0 cable for 1500 amp. maximum starting current.

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1. TACHOMETER M403

2. HOUR METER M402

3. VOLTMETER (generator) M406

4. AMMETER M407

5. PANEL LIGHTS FUSE (10 amp) F401

6. PANEL LIGHTS toggle switch S405

7. CONTACTOR CONTROL toggle switch S408

8. CONTACTOR CLOSED lamp DS408

9. CURRENT LIMITING CONTROL potentiometer R402

10. SPEED CONTROL toggle switch S406

Chapter 2-3 November 1, 2000 Page 2 Revised 07/01

11. ENGINE ON lamp DS407

12. ENGINE START push button switch S401

13. ENGINE CIRCUIT toggle switch S404

14. ENGINE CIRCUIT FUSE (20 Amp.) F402

15. WATER TEMPERATURE gauge M404

16. AIR FILTER RESTRICTION INDICATOR lamp DS412

17. OIL PRESSURE gauge M405

18. FUEL gauge M408

19. VOLTMETER (battery) M401

Control Box Assembly

(Front View)

Figure 1

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b. Operational Tests (Figure 1)

(1) Start the engine as described in 1-3; Para. 2, and let it warm at idle speed.

(2) Inspect for oil, fuel, and coolant leaks.

(3) Check the engine VOLTMETER (19) for proper voltage. Check OIL PRESSURE gauge (17). It

should read 35 to 60 psi (241 to 414 kPa). Check WATER TEMPERATURE gauge (15). It should read 180 to 200º F (82 to 93º C.) when engine is hot.

(4) Observe engine RPM on the TACHOMETER (1), idle speed should be 1000 RPM ± 50 RPM.

(5) Place the SPEED CONTROL switch (10) in the RATED RPM position. Check engine RPM’s at

operating speed: 2500 RPM ±50

(6) Check for 28.5 output voltage on generator VOLTMETER (3) to assure automatic voltage

buildup.

(7) Set CURRENT LIMITING CONTROL potentiometer (9) to maximum, full clockwise, position.

(8) Adjust the load bank for a load of 550 amperes.

(9) Place the CONTACTOR CONTROL toggle switch (7) in the CLOSE position. The CONTACTOR

CLOSED lamp (8) will glow as the contactor will close. Release the CONTACTOR CONTROL toggle switch to the center ON position. The TACHOMETER (1) will indicate 2200 ± 25 RPM.

(10) Disconnect the load bank and check the overvoltage protection by adjusting voltage regulator

potentiometer R46 (1, Fig. 2) to increase the voltage. The overvoltage relay will trip and open the load contactor between 32 to 34 volts.

(11) Readjust the voltage to 28.5 volts, connect the load bank, set it at 550 amperes, and close the

contactor.

(12) Remove load bank and check voltage regulation at no load. Voltage will be 28.5 volts.

Reconnect load bank and check voltage regulation with load bank set at 137, 275, 413, 550, and 660 amperes and check voltage at each setting. Voltage will be 28.5 ± 1 volts at each different load.

(13) With CURRENT LIMITING CONTROL potentiometer (9) set to 2000, apply 600 to 700 amperes

load to the generator and then set the CURRENT LIMITING CONTROL potentiometer to 400. Current displayed on AMMETER (4) will be 400 ± 40 amperes.

NOTE: Voltage will not drop below 14 volts.

(14) Set CURRENT LIMITING CONTROL potentiometer (9) to 2000 and apply 1200 amperes load.

Then set the CURRENT LIMITING CONTROL potentiometer to1000. Current displayed on AMMETER (4) will then be 1000 ± 100 amperes and voltage will not drop

(15) Remove load. Set engine to idle. Run for 3 minuets at idle

(16) Stop and restart the engine, check the instruments as directed in step (3), and check the entire

generator set for unusual vibration and noises.

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3. Voltage Regulator Adjustment

a. 28.5 Volt Adjustment

(1) The regulating voltage, in the 28.5 volt range, is determined by the position of the wiper arm of

the multi-turn potentiometer (1,Figure 2) R46. Clockwise (CW) rotation increases the voltage level at which the unit operates. Conversely, counterclockwise (CCW) rotation decreases the voltage level.

b. Line Drop Compensation

(1) Line drop compensation allows the voltage at the load end of the output cable to remain constant

despite the voltage drop associated with the output cable. Clockwise (CW) rotation of the single-turn potentiometer (2,Figure 2) R24 increases the compensation. This potentiometer should be set for flat regulation of voltage at the load end of the output cable when delivering rated load current.

Voltage and Line Drop Adjustments

Chapter 2-3 November 1, 2000 Page 4 Revised 07/01

Figure 2

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Section 4. Troubleshooting Procedures

1. General

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. Continue testing and checking the circuit, step-by-step, in an orderly manner, until the cause of trouble is located. Reference connection and schematic diagrams.

Troubleshooting Chart

a. Description

The troubleshooting chart lists information under three headings:

(1) Trouble, Symptom, and Condition,

(2) Probable Cause

(3) Test, Check, and Remedy

b. Use of the Troubleshooting Chart

Read the trouble symptoms and conditions before proceeding to causes and remedies.

For example:

At the beginning of the troubleshooting chart under ENGINE, the first trouble listed is: “Engine will not start. Starter will NOT crank engine.”

If the starter WILL crank the engine, then obviously this is not your symptom and condition. Go to the next “Trouble, Symptom, and Condition” directly below. If the starter will NOT crank the engine, look to the right under “Probable Cause” and “Test, Check, and Remedy” to find the various things which could cause the trouble and what to do to check and remedy them.

Equipment for Troubleshooting

A good quality, multi-scale voltmeter is the only instrument required similar clips, will be required. The 12 volt engine electrical system may be used for a 12 volt DC power source.

Safety Precautions

WARNING

Diagrams

A schematic/connection diagram of the generator set is provided in Chapter 5. This diagram can be very helpful in troubleshooting. Components shown in the diagram are identified by reference designators (or item names in some instances). A legend appearing on the diagram identifies each reference designator by its full item name. For example, the symbol K403 identifies the overvoltage relay, and M406 identifies the voltmeter.

Connections and Wiring

Before condemning any electrical component, check all connections and wiring which could affect its operation. In many instances a component may be non-functional simply because it is not receiving power because of a loose connection or a poor ground. In most cases throughout the troubleshooting chart, it will be assumed that connections and wiring have been checked.

Loose garments, neckties, and other hanging items must not be worn by personnel near the fan or other exposed moving parts of this equipment while it is running. Also, avoid contact with live electrical parts. death or serious injury could result!

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27 1

1. Fuel Tank Support

2. Fuel Tank

3. Control Panel

4. Rectifier Assembly

5. Generator

6. Frame

7. Engine

8. Air Cleaner

9. Battery

10. Contactor

Chapter 2-4 November 1, 2000 Page 2 Revised 07/01

Generator Set Components

Figure 1

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Jet-Ex 5D / Series 500285 / Generator Set

1. Muffler

2. Alternator

3. Oil filter

4. Starter

5. Starter solenoid

Engine Comp[onents

(Right Side of Unit)

Figure 2

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267

1. Fuel filter

2. Air cleaner

3. Throttle control assembly

4. Oil pressure sender

5. Oil pressure switch 20 psi (138 kPA)

6. Water Temp. Sender

7. Radiator

Chapter 2-4 November 1, 2000 Page 4 Revised 07/01

Engine Components

(Left Side of Unit)

Figure 3

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1. TACHOMETER (M403)

2. HOUR METER (M402)

3. VOLTMETER (generator) (M406)

4. AMMETER (generator) (M407)

5. PANEL LIGHTS FUSE (10 amp) (F401)

6. PANEL LIGHTS toggle switch (S405)

7. CONTACTOR CONTROL toggle switch (S408)

8. CONTACTOR CLOSED lamp (DS408)

9. CURRENT LIMITING CONTROL potentiometer (R402)

10. SPEED CONTROL toggle switch

(S406)

November 1, 2000 Chapter 2-4 Revised 07/01 Page 5

11. ENGINE ON lamp (DS407)

12. ENGINE START push button switch (S401)

13. ENGINE CIRCUIT toggle switch (S404)

14. ENGINE CIRCUIT FUSE (20 Amp.) (F402)

15. WATER TEMPERATURE gauge (M404)

16. AIR FILTER RESTRICTION INDICATOR lamp (DS412)

17. OIL PRESSURE gauge (M405)

18. FUEL gauge (M408)

19. VOLTMETER (battery) (M401)

Control Box Assembly

(Front View)

Figure 4

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Chapter 2-4 November 1, 2000 Page 6 Revised 07/01

1. Over voltage relay (K403)

2. Voltage regulator (VR402)

3. Excitation rectifiers (CR417 & CR418)

4. Control windings fuses (10 Amp.) (F406 - F408)

5. Voltage build-up fuse (10 Amp.) (F405)

6. Voltage regulator fuse (10 Amp.) (F403)

7. Throttle solenoid fuse (20 Amp. Slo-Blo) (F409)

8. Control Panel Lights (DS401, DS402 & DS420)

9. Rectifier Harness Connector (J43)

10. Engine Harness Connectors (J46 & J47)

11. Rectifier (CR401)

12. Capacitor (C403)

Control Box Assembly

(Interior View)

Figure 5

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Section 5. Troubleshooting Charts

See section 2-4 for all figures referenced in this section.

Engine and Controls

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

1. Engine will not start. Starter

will not crank engine.

a. Batteries discharged, sure

this voltage is reaching or loose battery or ground connection.

b. ENGINE START push

button switch S401 (12, Figure 4) defective.

c. Defective starter solenoid

L401 (5, Figure 2)

d. Defective starter B401

(4, Figure 2)

Check battery connections and check voltage across battery. Voltage should be approximately

12.8 VDC. If battery and connections are good, proceed to the next step.

Momentarily connect a jumper between the hot side of the starter solenoid L401 and the start switch terminal on the starter relay wire. If the starter operates, replace faulty switch. If starter doesn’t crank, proceed to the next step.

Momentarily connect a large capacity jumper cable between the hot side of the starter relay (Figure 2) and the starter input terminal. If the starter attempts to crank the engine, the starter solenoid is defective. Replace it. If engine still won’t crank, proceed to the next step.

If the engine will not crank after the previous steps, the starter is defective. Replace starter. If starter did attempt to operate, but couldn’t turn engine, proceed to the next step.

November 1, 2000 Chapter 2-5 Revised 03/01 Page 1

e. Internal engine seizure.

CAUTION:

Make certain that engine start switch is in “stop” position so that engine does not start.

Use a socket wrench on the front crankshaft pulley to try to turn engine by hand. If engine will not turn, internal damage is indicated.

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Engine and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

Engine will not start. Starter will not crank engine (continued).

2. Engine will not start. Starter DOES crank engine.

f. Engine seized up NOTE:

If engine is overcharged with ether for cold weather starting, it could seize up. If so, wait approx. 1/2 hour until it will be possible to turn engine.

a. ENGINE CIRCUIT FUSE

F402 (14, Figure 4) blown

b. Fuel valve at tank closed, or

no fuel in tank, engine has lost its prime

c. Defective ENGINE

CIRCUIT toggle switch S404 (13, Figure 4)

d. Defective fuel valve

solenoid (L404).

e. Defective fuel pump.

Replace ENGINE CIRCUIT FUSE. Use type AGC-2O fuse.

Check and correct as required.

Check for 12-V DC from terminal 4 of S404 in “START” position. If 12-V DC is not measured, replace defective switch.

Attempt to start engine while applying 12-V DC to the fuel valve solenoid. If the engine starts, the solenoid is defective, and should be replaced. If engine still doesn’t start, proceed to next step.

Check fuel pump according to instructions in the Engine Manufactures User’s Manual.

3. Engine starts then stops. a. Fuel not turned on.

Chapter 2-5 November 1, 2000 Page 2 Revised 03/01

b. Defective oil pressure

switch S403 (5, Figure 3)

Turn on fuel shutoff valve.

Connect a jumper wire across the “C” and “N.O.” terminals of oil pressure switch. Start engine and check oil pressure. If it is below 10 PSI (69 kPa) shut down the engine and check lubrication system for leaks. Also check the oil pump for leaks. If oil pressure comes up to normal and the engine continues to run, the oil pressure switch is defective. Replace oil pressure switch.

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Engine and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

4. Engine starts then stops when

ENGINE CIRCUIT toggle switch S404 is released to “ON” position.

5. Engine does not attain normal idle RPM, or idles too fast.

a. Open over temperature

switch S402 or defective ENGINE CIRCUIT toggle switch.

b. Choked fuel filter, restriction

in air cleaner, or air in fuel system.

a. Loose throttle linkage

b. Defective full throttle

solenoid L403.

Place a clip-lead jumper wire on the water temperature switch terminals and check for normal operating temperature. If engine then starts properly, replace water temperature switch. If not, replace engine switch.

Check for these faults according to instructions in the Engine Manufactures User’s Manual.

If solenoid core is pulled into the full throttle solenoid L403 when SPEED CONTROL toggle switch S406 is in RATED RPM position, check for loose control rod between solenoid and throttle. Tighten if required. If solenoid core does not pull in, proceed to the next step.

Check for l2-V-DC across two terminals of solenoid when S406 is in RATED RPM position. If l2-V DC is measured, but solenoid core does not pull in, replace the solenoid.

6. Engine will not run at rated speed (2450-2550 RPM)

November 1, 2000 Chapter 2-5 Revised 03/01 Page 3

a. SPEED CONTROL toggle

switch S406 (10, Figure 4) defective.

If engine will not go from idle to rated speed when SPEED CONTROL toggle switch is in RATED RPM position, turn off engine and take resistance measurements at SPEED CONTROL toggle switch terminals with switch in the RATED RPM position.

Zero resistance should be measured between terminals having red-blue and orange yellow wires. Replace speed control switch if measurement is improper.

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Engine and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

7. Engine lacks power. a. Insufficient air to engine. Check AIR FILTER

RESTRICTION INDICATOR lamp (16, Figure 4) for illumination. Replace or clean as required.

b. Restricted exhaust system.

c. Low compression.

8. Engine Overheats. a. Dirt or sludge in Coolant

b. Debris and dirt in radiator

core.

c. Fan belt slips or is broken.

Check exhaust pipe for restrictions. Check muffler for clogged condition. Replace as required.

Check compression in all cylinders according to the Engine Manufactures User’s Manual.

Drain coolant, flush radiator, put in clean coolant. Refer to the Engine Manufactures User’s Manual in for instructions.

Clean radiator core carefully. Refer to the Engine Manufactures User’s Manual.

Tighten belt or replace as required

Chapter 2-5 November 1, 2000 Page 4 Revised 03/01

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Generator and Controls

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

1. Generator will not build up

voltage when SPEED CONTROL toggle switch S406 (10, Figure 4) is placed in RATED RPM position.

a. Voltage build-up fuse F405

is blown.

b. Defective excitation rectifier

CR417 and/or CR418.

c. Defective capacitor C403.

d. Defective flyback diode

CR419.

e. Generator revolving field

L406 defective.

Replace voltage build-up fuse (5, Figure 5). Proceed to Step b to determine cause of blown fuse.

Check excitation rectifiers ( 3, Figure 5) with an ohmmeter to see if they are good. If either rectifier is defective, replace it. If both rectifiers are good, proceed to Step c.

Check capacitor (12, Figure 5) with an ohmmeter to see if it is good. If defective, replace it; otherwise proceed to Step d.

Check diode, on brushholder mounting bracket, with an ohmmeter to see if it is good. If defective, replace it; otherwise proceed to Step e.

Locate yellow and red-orange wires on the right terminal strip at lower rear of control panel. Disconnect the yellow and red-orange wires which go down to the generator. Refer to connection diagrams in Chapter

Measure resistance between these two wires. It should be 10 to 11 ohms. If reading indicates an open, short or lower than normal resistance, proceed to Step f.

November 1, 2000 Chapter 2-5 Revised 03/01 Page 5

f. Defective generator

armature G402.

g. Voltage regulator fuse F403

is blown.

If check of the generator revolving field (Step e. above) revealed no trouble, the generator stator is defective. Send unit to overhaul.

Replace voltage regulator fuse (6, Figure 5). Proceed to Step h. to determine reason for blown fuse.

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Generator and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

Generator will not build up voltage when SPEED CONTROL toggle switch S406 (10, Figure 4) is placed in RATED RPM position (continued)

2. Generator builds up to only a low voltage when SPEED CONTROL toggle switch S406 (10, Figure 4) is place in RATED RPM position

3. Generator builds too high a voltage.

h. Defective rectifier CR401. Use ohmmeter to check rectifier

CR401 (11, Figure 5). Replace rectifier if defective.

i. Generator voltage regulator

VR402 defective.

a. Defective excitation rectifier

CR417 and/or CR418.

b. Generator voltage regulator

VR402 defective.

a. Defective SPEED

CONTROL toggle switch S406 (10, Figure 4).

b. Defective blocking rectifier

CR401.

c. Generator voltage regulator

VR402 defective.

Replace voltage regulator (2, Figure 5).

Check excitation rectifiers (3, Figure 5) with an ohmmeter to see if they are good. If either rectifier is defective, replace it. If both rectifiers are good, proceed to Step b.

Replace voltage regulator (2, Figure 5).

Use ohmmeter to check SPEED CONTROL toggle switch. Replace switch if defective.

Use ohmmeter to check blocking rectifier (11, Figure 5) Replace rectifier if defective.

Replace voltage regulator (2, Figure 5) with a voltage regulator known to be good, and resume operation of generator set. If new voltage regulator produces normal operating voltage, send old voltage regulator to factory for service.

4. Load contactor will not close when CONTACTOR CONTROL toggle switch S408 (7, Figure 4) is placed in closed position. Engine running normally, voltage normal, no load applied to output cable.

Chapter 2-5 November 1, 2000 Page 6 Revised 03/01

a. Defective CONTACTOR

CONTROL toggle switch.

b. Defective load contactor

K402.

Momentarily connect a jumper lead between terminals with red and yellow wires on the CONTACTOR CONTROL toggle switch. If the load contactor closes momentarily, replace switch.

If load contactor (10, Figure 1) will not close when contactor close switch is jumpered, it is likely that the contactor is defective. Replace contactor.

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Generator and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

Load contactor will not close when CONTACTOR CONTROL toggle switch S408 (7, Figure 4) is placed in closed position. Engine running normally, voltage normal, no load applied to output cable (continued)

5. Load contactor opens as soon as CONTACTOR CONTROL toggle switch S408 (7, Figure

4) is released from its top (spring-loaded) position, to Run position.

6. Load contactor K402 opens during power delivery.

c. Overvoltage relay K403

defective.

a. Defective CONTACTOR

CONTROL toggle switch.

b.c. Load contactor K402

defective.

a. Contactor opening could

have been normal because of an overvoltage condition.

Connect a jumper lead between terminals T and P on the overvoltage relay (1, Figure 5). If contactor will now close, replace overvoltage relay.

Connect a jumper lead between terminals with red and blue wires on the CONTACTOR CONTROL toggle switch. If the load contactor now remains closed, replace contactor close switch.

If no fault was found in steps 4-a and b, the load contactor (10, Figure 1) is probably defective. Replace load contactor.

Resume operation and closely observe VOLTMETER (3, Figure 4) for evidence of overvoltage. If contactor opens when no overvoltage condition exists, proceed to Step b.

November 1, 2000 Chapter 2-5 Revised 03/01 Page 7

b. Overvoltage relay K403

defective.

c. Overvoltage board out of

adjustment.

d. Load contactor K402

defective.

Check overvoltage relay by operating the machine under load and gradually raising voltage at the voltage regulator (2, Figure 5) while observing VOLTMETER (3, Figure 4). Start with a low voltage (25V DC) and gradually increase voltage until relay functions to open load contactor. (32 to 34V)

If relay trips at less than 32-V DC, adjust potentiometer (P1) on the overvoltage board (1, Figure 5). If this does not correct problem, return old board to factory for service.

If no fault was found in above steps, replace load contactor (10, Figure 1)

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Generator and Controls (continued)

See section 2-4 for all figures referenced in this section.

Trouble, Symptom and Condition Probable Cause Test, Check, and Remedy

7. Output current cannot be

limited by CURRENT LIMITING CONTROL potentiometer R402 (9, Figure 4)

a. Defective CURRENT

LIMITING CONTROL potentiometer

b. Defective voltage regulator

VR402.

Shut down engine and check potentiometer with an ohmmeter. To do this, disconnect the plug (P404) from the regulator board (2, Figure 5) and take resistance measurements from pin 2 to pin 9 and then from pin 2 to pin 10 on the plug. For each measurement, slowly turn CURRENT LIMITING CONTROL potentiometer through its entire range, while observing the ohmmeter readings. Resistance should be from 0-10 k ohms. Replace if necessary.

Replace voltage regulator with one known to be good, and then operate the generator set under sufficient load to observe current limiting. If CURRENT LIMITING CONTROL potentiometer now controls current properly, send old voltage regulator to factory for service.

Chapter 2-5 November 1, 2000 Page 8 Revised 03/01

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Jet-Ex 5D / Series 500285/ Generator Set

Chapter 3. Overhaul/Major Repair

Section 1. Flexible Coupling

1. General

This chapter provides basic instructions for removal, service and installation of a flexible coupling kit, with a fan attached. This flexible coupling kit is designed for use with single-bearing generator sets.

Figure 1 shows a rear view and side view of the flexible coupling assembly. The primary function of this assembly is to couple a Hobart generator set to a diesel engine. The flexible coupling assembly compensates for slight misalignment between the engine and the generator, due to manufacturing tolerances. A split taper bushing secures the coupling to the generator’s armature shaft. (See Fig. 3 &

4).

November 1, 2000 Chapter 3-1 Revised 03/01 Page 1

Coupling Assembly

Figure 1

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2. Coupling Screws (Routine Coupling Maintenance)

CAUTION

If the generator set is functioning properly, servicing the coupling assembly will be essentially limited to checking the screws which attach the flexible coupling to the engine flywheel of the generator set. These 8 screws should be checked periodically to make certain that: (1) screws of proper type, length, and hardness are installed, (2) that the threads of the screws are not stripped, and (3) that they are torqued properly. Proceed as follows to check coupling screws.

a. Remove the sheet metal covers from around the generator housing and the flywheel housing.

b. Refer to Figure 2. Hold a short iron bar through the flywheel housing against the fan blades of the

fan and coupling assembly to block the armature against clockwise rotation. Do this carefully to avoid damaging the fan blades.

c. Use a long-handled, reversible ratchet drive fitted with a 5/16-inch Allen wrench to remove one

coupling screw. Examine the screw. Screws specified for this coupling are Hobart Part No. 402789-004, which are socket-head, 3/8 - 16 X 3/4 inch long.

NOTE: Use of the proper coupling screws for replacement is very important. Replacement screws

MUST be those specified above, torqued to 40 - 45 foot-pounds (54 - 61 Nm). There is NO ACCEPTABLE SUBSTITUTE for these screws.

d. Check the threads of the screw for stripping and replace it if the threads are stripped. If the screw is

not stripped, reinstall it and torque it to 40 - 45 foot-pounds (54 - 61 Nm).

e. Repeat the steps b, c, and d above for the remaining seven screws.

Failure to verify proper coupling screw installation may result in coupling failure and damage to the equipment.

f. Reinstall covers around housings.

Access to Coupling Screws

(for removal and

installation)

Figure 2

Chapter 3-1 November 1, 2000 Page 2 Revised 03/01

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3. Disassembly

Removal of the flexible coupling is required for servicing the generator armature, generator bearings, or the coupling itself. To remove the coupling, for any reason, it is necessary to separate the engine and generator. Many mechanics prefer to remove the engine and generator as an assembly, and then separate them. Others may prefer to remove the engine or the generator separately to reach the coupling. However, separating the engine and generator while they are installed in the ground power unit is VERY DIFFICULT because of the limited working space.

During removal DO NOT cut any cables or wires. Disconnect cables or wires if/as necessary and tag them for reassembly.

a. Separate Engine and Generator

(1) Remove fuel tank and canopy components.

(2) Remove the sheet metal cover from around the generator housing and the flywheel housing.

(3) Attach a hoist to the generator housing.

(4) Use a long-handled, reversible ratchet drive fitted with a 5/16-inch Allen wrench to remove the

screws which attach the flexible coupling disk to the engine flywheel.

(5) Support the rear of the engine with a jack stand.

(6) Remove the bolt and shock mount attaching the generator housing to the frame.

(7) Remove the bolts attaching the generator housing to the engine flywheel housing.

(8) Separate the generator from the engine with the hoist and move it to a clear working area.

b. Remove Coupling Assembly (Figure 3)

(1) Using a socket wrench, remove all three of the 3/8-16 X 3/4 inch screws (3) that secure the

bushing (1) to the hub of the fan and coupling assembly.

(2) To separate the bushing from the hub, lubricate two of the 3/8-16 X 3/4 inch screws and insert

them into the threaded holes (4) in the bushing. With socket wrench, screw these screws into the bushing such that the bushing pops loose from the hub.

(3) Using a 3/16-inch Allen wrench, loosen the set screw (6) in the bushing to release pressure on

the key (5).

(4) When the bushing (1) is loose in the hub, use a mallet to GENTLY tap the bushing out of the

hub.

(5) Slide the coupling assembly off the shaft and remove the key (5).

(6) Using a 9/16-inch socket wrench, remove the screws which attach the flexible disks to the hub.

(7) Inspect the coupling assembly components carefully as follows:

a. Check for deformed fan blades and damage to the disk.

b. Check hub and split bushing for cracks, evidence of galling, and rust pits. Light rust is

permissible on the split bushing and the tapered bore of the hub.

c. Check the flexible coupling disks for warping, cracks, or worn mounting holes.

d. Check the screws which attach the flexible disks to the hub. The screws are Hobart Part No.

287935-001, which are socket head, 3/8 - 16 X 2-1/4 inch long. If they are cracked, stretched, or have stripped threads, replace them.

NOTE: Use of the proper coupling screws and washers for replacement is very important.

Replacement screws and washers MUST be those specified above, torqued to 40 - 45 foot-pounds (54 - 61 Nm). There is NO ACCEPTABLE SUBSTITUTE for these screws or washers.

e. Check the shaft for any damage or deformation where the coupling was mounted on it.

November 1, 2000 Chapter 3-1 Revised 03/01 Page 3

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1. Bushing

2. Split

3. Mounting Holes (3)

4. Tapped holes (2)

5. Key

Split Taper Bushing

Figure 3

4. Coupling Service

If you have any questions concerning your Hobart Ground Power equipment, immediately contact our Service Department by mail, telephone or FAX. When calling about service or parts from your Hobart Brothers Company Distributor, be sure to include all pertinent information from the unit’s identification plate: Specification No., Model No., and unit rating.

Write: Hobart Brothers Company

Ground Power Division Service Department 1177 Trade Road East Troy, Ohio 45373 U.S.A

In U.S.A. Call Toll Free (800) 422-4166 (Parts)

(800) 422-4177 (Service)

From Foreign Countries, Call: (937) 332-5050 (Parts)

(937) 332-5060 (Service)

Fax: (937) 332-5121

800-367-4549 Toll Free in U.S.A.

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5. Coupling Installation and Reassembly of Engine and Generator

CAUTION

a. Cleaning (Figure 4)

It is VERY IMPORTANT that the shaft, the bore and the outside of the split bushing, and the tapered inside of the hub be thoroughly CLEANED FREE OF DIRT AND GRIT.

CAUTION

b. Assembly (Figure 4)

CAUTION

Proceed as follows to reassemble engine and generator.

(1) Attach the four flexible disks to the coupling hub with the six socket head 3/8 - 16 X 2-1/4 inch

screws (Hobart Part No. 287935-001). The screws must be torqued to 40 - 45 foot-pounds (54 61 Nm).

(2) Attach the coupling assembly to the flywheel, using the socket-head 3/8 - 16 X 3/4 inch screws

(Hobart Part No. 402789-004). DO NOT tighten with a wrench. See Figure 4.

(3) Torque all of the coupling screws to 40 - 50 foot-pounds (54 - 68 Nm). Be sure the flexible disks

are all seated evenly into the seat of the flywheel.

(4) Install the key in the key way of the armature shaft.

(5) Place the coupling bushing on the shaft of the armature, aligning the key way of the bushing with

the key way of the shaft.

(6) Using a hoist, align the bushing to the coupling key way and also the generator housing flange to

the engine flywheel housing, and insert the attaching screws for the housing. Start the screws into the tapped holes just enough to ensure thread engagement. DO NOT TIGHTEN.

(7) Tighten the generator housing attaching screws at this time.

(8) Remove the bearing cap from the back of the generator assembly.

(9) Inspect the rear bearing. If it has moved out of the rear bearing support hub, it will need to be

reset. Correct placement of the rear bearing, should be within 1/8” from the rear surface of the bearing hub.

(10) Slide the coupling bushing forward until it is snug in the coupling hub.

Improper installation of the coupling assembly can result in serious damage to the equipment. Follow these installation instructions exactly.

Do not lubricate any of the surfaces listed above. Lubrication of these surfaces can cause the coupling to fail and damage the generator set. Slight traces of rust are permissible only on the bushing, but nothing else.

Use of the proper coupling screws is very important. Failure to use the proper screws, as outlined below, can result in coupling failure and damage to the generator set.

CAUTION

(11) Lubricate the three 3/8-16 X 3/4 screws SPARINGLY and start them into the three (unthreaded)

holes finger-tight. See Figure 4.

November 1, 2000 Chapter 3-1 Revised 03/01 Page 5

Make certain that only the screws are lubricated, and that no lubricant is permitted to get inside the bushing where the armature shaft will enter the bushing.

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(12) Refer to Figure 2. Insert and hold a short iron bar through the flywheel housing against the fan

blades of the fan and coupling assembly to block the armature against clockwise rotation. Do this carefully to avoid damaging the fan blades.

(13) Tighten the 3/8-16 X 3/4 screws alternately and evenly as follows:

a. Set a torque wrench to 30 foot-pounds (41 N-m) and tighten all three 3/8-16 screws to that

value. As illustrated in Figure 2, insert and hold a short iron bar through the fan housing against the fan blades of the fan and coupling assembly to block the coupling against clockwise rotation. Do this carefully to avoid damaging the fan blades. Note that as these screws are tightened, the armature will be pulled back into the bearing hub.

b. Repeat step (a) above until 3/8-16 screws can no longer be tightened.

(14) Make certain that the armature is pulled slightly into the bearing hub (so that it does not interfere

with the bearing cap).

(15) Using a 3/16-inch Allen wrench, tighten the set screw in the bushing to apply pressure on the

key.

(16) Re-install the bearing cap that was removed in step (8).

(17) Re-install the generator housing cover and the flywheel housing cover.

(18) Re-install the fuel tank and canopy components.

Chapter 3-1 November 1, 2000 Page 6 Revised 03/01

Assembly Procedure Illustration

Figure 4

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6. Run-in and Periodic Check

a. Mount the engine-generator assembly in a suitable test area and operate it for a 2-hour run-in.

b. Shut down the engine after 2 hours and re-torque all coupling screws to 40 - 45 foot-pounds (54 -

61 Nm) to compensate for normal torque relaxation.

c. Return the unit to normal service.

d. After 200 hours of operation, check all coupling screws and taper-lock bolts with a torque wrench

set at 40 - 45 foot-pounds (54 - 61 Nm) .

e. Return the unit to normal service.

f. After each additional 2,000 hours of operation (or every year) recheck all coupling screws to

maintain the same torque value.

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Chapter 4. Illustrated Parts List

Section 1. Introduction

1. General

The illustrated Parts List identifies, describes, and illustrates main assemblies, sub-assemblies, and detail parts of the Jet-Ex 5D Generator Sets manufactured by Hobart Brothers Company, Ground Power Division, Troy, Ohio 45373.

Purpose

The purpose of this list is to provide parts identification and descriptive information to maintenance and provisioning personnel for use in provisioning, requisitioning, purchasing, storing, and issuing of spare parts.

Arrangement

CHAPTER 4 is arranged as follows:

Section 1 - Introduction

Section 2 - Manufacturer’s Codes

Section 3 - Parts List Section 4 - Numerical Index

Explanation of Parts List

a. Contents

The parts list contains a breakdown of the equipment into groups, assemblies, subassemblies, and detail parts. All parts of the equipment are listed except:

(1) Standard hardware items (attaching parts) such as nuts, screws, washers, etc., which are

available commercially.

(2) Bulk items such as wire, cable, sleeving, tubing, etc., which are also commercially available.

(3) Permanently attached parts which lose their identity by being welded, soldered, riveted, etc., to

other parts, weldments, or assemblies.

b. Parts List Form

This form is divided into six columns. Beginning at the left side of the form and proceeding to the right, columns are identified as follows:

(1) “FIGURE-ITEM NO.” Column

This column lists the figure number of the illustration applicable to a particular parts list and also identifies each part in the list by an item number. These item numbers also appear on the illustration. Each item number on an illustration is connected to the part to which it pertains by a leader line. Thus the figure and item numbering system ties the parts list to the illustrations and vice versa. The figure and index numbers are also used in the numerical index to assist the user in finding the illustration of a part when the part number is known.

November 1, 2000 Chapter 4-1

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(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. Parts manufactured by Hobart reflect no vendor code or part number in the “NOMENCLATURE” column.

(3) “NOMENCLATURE” Column

The item identifying name appears in this column. The indenture method is used to indicate item relationship. Thus, components, of an assembly are listed directly below the assembly and indented one space. Vendor codes and part numbers for purchased parts are shown in this column. Hobart modification to vendor items is also noted in this column.

(4) “EFF” (Effective) Column

This column is used to indicate the different models that use the part on that line. There are some parts may be used on only one, or a variety of models. A code letter “A”, “B”, etc., is placed in EFF column to indicate these parts. It can be cross referenced to the particular model it is used on. If a letter is not placed in that column, then all models use that part.

Parts coded “A” are useable on part number 500285-001 only.

Parts coded “B” are useable on part number 500285-002 only.

(5) “UNITS PER ASSEMBLY” Column

This column indicates the quantity of parts required for an assembly or subassembly in which the part appears. This column does not necessarily reflect the total used in the complete end item.

Chapter 4-1 November 1, 2000 Page 2

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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 Manufacturer’s Cataloging Handbook H4-l, and are arranged in numerical order. Vendor codes are inserted in the nomenclature column of the parts list directly following the item name and description. In case a manufacturer does not have a vendor code, the name of the manufacturer will be listed in the nomenclature column.

Code Vendor’s Name and Address

01XD4 Contact Industries Inc., 25 Lex-Industrial Dr.,

P.O. Box 3086, Mansfield, OH 44904-3086

02231 Anchor Rubber Company, 840 S. Patterson Blvd. Dayton, Ohio 45402

04055 East Penn Mfg., Co., Inc., Deka Rd., Lyon Station, PA 19536

04713 Motorola Inc., Semiconductor Products Div. Phoenix, Arizona 85008

13445 Cole-Herse, 20 Old Colony Ave. Boston, MA 02127

14552 Microsemi Corp., 2830 S. Fairview St., Santa Ana, CA 92704-5948

14799 Square D Co., Chicago Assembly Plant,

9522 W. Winona, Schiller Park, IL 60176-1025

16476 Datcon Instrument Co., P.O. Box 128, East Petersburg, PA 17520

18265 Donaldson Co., 1400 W. 94th St., P.O. Box 1299, Minneaplis, MN 55420

21585 Farr Co., 2221 Park Pl., EL Segundo, CA 90245

23803 NTN Bearing Corp., 650 Pennsylvania Dr., Exton PA 19341

28520 Heyco Molded Products, 750 Boulevard,

P.O. Box 160, Kenilworth, NJ 07208-1222

30104 Automotive Controls Corp., 1300 W. Oak St.,

P.O. Box 788 Independence, KS 67301-2347

33457 Fleetguard Inc., 402 BNA Dr., Nashville, TN 37217

40121 Peterson Mfg. Co. Inc, 700 W. 143rd St., P.O. Box 8 Plainfield, IL

44655 Ohmite Mfg. Co., 3601 W. Howard St., Skokie, IL 60076

46992 Phoenix Electric, 3625 N. Halstead St., Chicago, IL 60613

49234 Protectoseal Company, 1920 S. Western, Chicago IL 60608

5P059 Tech Products Corp, 2348 Sandridge Dr., Dayton, OH 45439

November 1, 2000 Chapter 4-2 Revised 03/01 Page 1

60544-9733

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Code Vendor’s Name and Address

5E599 NVF Co., Primary Products Div., Yorklyn Rd, Yorklyn DE 19736

57733 Stewart-Warner Corp., 1826 Diversey Parkway, Chicago, IL 60614

59993 International Rectifier, 233 Kansas St., EL Segundo CA 90245

71400 Bussman Division of McGraw-Edison Company, 114 Old State Rd.,

St. Louis, Missouri 63178

74542 Hoyt Electrical Instruments, P.O. BOX 8798, Penacook, NH 03303

74559 Carling Switch Co., 505 New Park Ave.,

West Hartford, CT 06110

75175 K-D Lamp Co., 1910 Elm St., Cincinnati, OH 45210-2451

78377 SCP Inc., 9115 George Ave., Cleveland, OH 44105

78388 Synchro-Start Products, Inc., 8109 N. Lawndale Ave.,

P.O. Box 147 Skokie, IL 60076-9990

79470 Dana Corp., Weatherhead Div., 5278 US 24, Antwerp, OH 45813

7L306 Clarke GM Diesel, 1340 Terminal Rd., Indianapolis, IN 46217-9342

83330 Dialight Corp., 1913 Atlantic Ave., Manasquan, NJ 08736-1005

88136 Trombetta Corp., 1633 E. North Ave., Milwaukee, WI. 53202

91929 Honeywell Inc., Micro Switch Div., 11 W. Spring St., Freeport IL 61032

92489 Attwood Corp., 1016 Monroe Ave., Lowell MI, 49331

94177 Modine Mfg. Co., 1500 Dekoven Ave., Racine, WI 53401

94222 Southco Inc., 210 N. Brinton Lk. Rd., Concordville, PA 19331

9X737 Buyers Products Co., 7700 Tyler Blvd., Mentor, OH 44060-4802

Chapter 4-2 November 1, 2000 Page 2 Revised 03/01

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Section 3. Parts List

1. Explanation of Parts List Arrangement

The parts list is arranged so that the illustration will appear on a left-hand page and the applicable parts list will appear on the opposite right-hand 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.

Symbols and Abbreviations

The following is a list of symbols and abbreviations used in the parts list.

* - item not illustrated

A, or AMP - ampere

AC - alternating current

AR - as required

DC - direct current

Fig. - Figure

hd. - head

hex - hexagon

Hz - Hertz (cycles-per-second)

I.D. - inside diameter

IN - inch

kVA - kilovolt-ampere

uF - microfarad

No. - number

OM - Owners Manual

PRV - peak reverse voltage

PSI - pounds per square inch

Ref - reference (the item has been listed previously)

TM - Technical Manual

v - volt (when used as a prefix to a five-digit number, indicates vendor code)

NOTE: An item which does not reflect an index number is an assembly which is not illustrated in its

assembled state, or it is similar (right-hand, left-hand, top, etc.) to an item which is illustrated.

November 1, 2000 Chapter 4-3 Revised 06/01 Page 1

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Chapter 4-3 November 1, 2000 Page 2 Revised 06/01

Generator Set Assembly

Figure 1

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NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

1- 500285-001 GENERATOR SET ASSEMBLY

WITH TRAILER AND CABLE TRAYS A REF

500285-002 GENERATOR SET ASSEMBLY

STATIONARY MOUNT WITH CABLE HANGERS B REF

1-1 77A1157 . SWITCH, EMERGENCY STOP (V14799 #KR-9R-H6) 1 1-2 285681 . EMERGENCY STOP LEGEND PLATE 1 1-3 285125 . EMERGENCY STOP GUARD (V14799 #K56YM) 1 1-4 No Number . CANOPY COMPONENTS (See Fig. 3) REF

1-5 No Number . GENERATOR SET INTERIOR COMPONENTS

(See Fig. 4) REF 1-6 No Number . MOUNTING FRAME ASSEMBLY (See Fig. 2) REF 1-7 288021 . CONTROLS COVER 1 1-8 288022 . CONTROLS COVER HINGE 1

1-9 288023 . WING KNOB LATCH 2

* 288020 . LATCH BRACKET 2

1-10 288007-001 . CONTROL BOX ASSEMBLY (See Fig. 5) 1 1-11 282562 . CAP, FUEL (V49234 #1275G/12T) 1 1-12 79A1127-002 . FILLER NECK GUARD 1

1-13 288060-001 . EXHAUST 1 1-14 282732-001 . CLEARANCE MARKER LIGHT 4 1-15 286847 . GUARD, CLEARANCE LIGHT 4 1-16 488640 . OUTPUT CABLE BRACKET 1 1-17 7J422-000 . OUTPUT CABLE CLAMP 1

1-18 403091-008 . PLASTIC HOLE PLUG 1

1-19 NOT USED * 1-20 287698-001 . OUTPUT CABLE COVER 1 * 1-21 402987 . NAMEPLATE, HOBART 3 * 1-22 78A1000 . NAMEPLATE, ID 1

* 1-23 79A1110 . NAMEPLATE, OPTION 1 * 1-24 283533 . LABEL, SUPPORT CENTERS 1 * 1-25 81B1084 . LABEL, 28 VOLTS 1 * 1-26 405309 . LABEL, LUBE OIL FILTER 1 * 1-27 407366 . LABEL, CAUTION - INSUFFICIENT COOLING 1

* 1-28 76B1148 . LABEL, DIESEL FUEL 1 * 1-29 282658 . LABEL, CLEARANCE 1 * 1-30 401842 . TAG, ATTENTION - ENGINE COOLANT 1 * 1-31 40201 . TAPE, SEALANT, NEOPRENE 612" * 1-32 287459 . LABEL, GENERAL INFORMATION 1

* 1-33 287460 . LABEL, DANGER HIGH VOLTAGE 2 * 1-34 287461 . LABEL, FUEL WARNING 1 * 1-35 287462 . LABEL, ENGINE COOLANT 1 * 1-36 287463 . LABEL, HOT MUFFLER 1 * 1-37 287464 . LABEL, FAN AND MOVING PARTS 2

* 1-38 287466 . LABEL, EMERGENCY STOP 1 * 1-39 282554-003 . REFLECTOR KIT 1 * 1-40 282554-004 . REFLECTOR KIT A 1

November 1, 2000 Chapter 4-3 Revised 06/01 Page 3

* Not Illustrated

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Chapter 4-3 November 1, 2000 Page 4 Revised 06/01

Mounting Frame Assembly

Figure 2

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Jet-Ex 5D / Series 500285 / Generator Set

NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

2- No Number MOUNTING FRAME ASSEMBLY REF

2- 1 287971 . CONTROL PANEL SUPPORT, LEFT 1 2- 2 287980 . FUEL TANK SUPPORT 1 2- 3 287972 . DOOR SUPPORT PANEL 2

* 288064-004 . DOOR SUPPORT INSULATION 2

2- 4 287953 . ENGINE SUPPORT 1

2- 5 287984 . BATTERY TRAY 1 2- 6 287998 . FRONT PANEL BRACKET 2 2- 7 287950 . MOUNTING FRAME 1 2- 8 287970 . CONTROL PANEL SUPPORT, RIGHT 1 2- 9 287955 . GENERATOR SUPPORT 1

2-10 287986 . CONTROL PANEL SUPPORT 1

* Not Illustrated

November 1, 2000 Chapter 4-3 Revised 06/01 Page 5

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Chapter 4-3 November 1, 2000 Page 6 Revised 06/01

Canopy Components

Figure 3

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Jet-Ex 5D / Series 500285 / Generator Set

NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

3- No Number CANOPY COMPONENTS REF

3- 1 287981 . TOP CANOPY 1 * 288064-003 . TOP CANOPY INSULATION 1 * 288064-005 . TOP CANOPY INSULATION 1

3- 2 287999 . RADIATOR CAP ACCESS DOOR 1

3- 3 287979 . FRONT PANEL 1

3- 4 287542-001 . DOOR LATCH 4

3- 5 287526-002 . DOOR LATCH PULL 4

3- 6 287978 . ACCESS DOOR 4 * 288064-001 . DOOR INSULATION 4

3- 7 283824 . RIGHT HAND HINGE 4

3- 8 283597 . LEFT HAND HINGE 4

3- 9 287977 . SIDE PANEL 4 * 288064-002 . SIDE PANEL INSULATION 4 * 287785 . PANEL FASTENER 16

3-10 287987 . LOWER REAR PANEL 1

* Not Illustrated

November 1, 2000 Chapter 4-3 Revised 06/01 Page 7

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Generator Interior Components

Figure 4

Chapter 4-3 November 1, 2000 Page 8 Revised 06/01

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NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

4- No Number GENERATOR SET INTERIOR COMPONENTS REF

4- 1 No Number . BATTERY COMPONENTS (See Fig. 6) REF 4- 2 No Number . MUFFLER COMPONENTS (See Fig. 7) REF 4- 3 288306 . RECTIFIER ASSEMBLY (See Fig. 8) 1 4- 4 No Number . CONTACTOR COMPONENTS (See Fig. 9) REF 4- 5 No Number . ENGINE COMPONENTS (See Fig. 10) REF

4- 6 No Number . COOLING SYSTEM (See Fig. 11) REF 4- 7 No Number . FUEL SYSTEM COMPONENTS (See Fig. 12) REF 4- 8 No Number . THROTTLE CONTROL COMPONENTS (See Fig 10) REF 4- 9 287556 . GENERATOR ASSEMBLY (See Fig. 13) 1 4- 10 No Number . AIR CLEANER COMPONENTS (See Fig. 15) REF

* 4- 11 No Number . TRAILER COMPONENTS (See Fig. 16) A REF

* 4-12 489689 . STATIONARY MOUNTING KIT B 1

* NOT ILLUSTRATED

November 1, 2000 Chapter 4-3 Revised 06/01 Page 9

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Chapter 4-3 November 1, 2000 Page 10 Revised 06/01

Control Box Assembly

Figure 5

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Jet-Ex 5D / Series 500285 / Generator Set

NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

5- 288007-001 CONTROL PANEL ASSY 1

5- 1 286865 . PANEL, CONTROL, . 1 5- 2 W11166-005 . FUSE, , 20A, V71400 1 5- 3 402658 . HOLDER, FUSE (V714OO #TYPE) 2 5- 4 494134-001 . GAUGE, FUEL, ELECTRIC, 12V

(V16476 #06339-01) 1

5- 5 403189 . SWITCH, TOGGLE (V91929 #312TS1-59) 2 5- 6 78A1120-001 . GAUGE, HOUR METER (V16476 #56288) 1 5- 7 286699-001 . VOLTMETER, BATTERY (V16476 #06351-001) 1 5- 8 286864 . LABEL, CONTROL PANEL 1 5- 9 288165 . ADJUSTABLE GRIP LATCH 2

5-10 78A1117-001 . GAUGE, OIL PRESSURE (V16476 #06340) 1 5-11 287908 . GAUGE, WATER TEMP., (V16476 #06343) 1 5-12 408596-001 . TACHOMETER (V16476 #71076-00) 1 5-13 30GH1262 . LIGHT, PANEL, SOCKET 3

* 50GHP206 . PANEL LIGHT LAMP 3

* 288018 . PANEL LIGHT BRACKET 3

5-14 401937-004 . BLOCK, TERMINAL, 20A. (V83330 #699-18KT50) 2 5-15 W11166-003 . FUSE, 10A. 6 5-16 402662 . SWITCH, TOGGLE, DPST, (V74559 #2GK71-73) 1 5-17 180913-002 . LIGHT, PILOT, GREEN, 28V. ASSEMBLY 1

* 180914 . . BASE, LIGHT (V83330 #26-5710-11-301) 1 * 404172-003 . . LENS, GREEN (V83330 #26-1192-300) 1 * 400613-003 . . BULB 1

5-18 16DA2162 . KNOB, RHEOSTAT, (V44655 #5150) 1 5-19 401428-001 . POTENTIOMETER, 10K OHM, 2W.

(V44655 #CMU-1031) 1

5-20 286923 . COVER, 14V OPTION 1 5-21 402663 . NUT, POTENTIOMETER, LOCK 1 5-22 407948 . RECTIFIER, ISOLATED BASE (V14552 #CT 106) 1 5-23 W10051-014 . CLAMP, WIRE, PLASTIC 1 5-24 405129-001 . BLOCK, FUSE (V71400 #S8202-6) 1

5-25 180913-001 . LIGHT, PILOT, ENGINE, GREEN, 12V. ASSY. 1 * 180914 . . BASE, LIGHT (V83330 #26-5710-11-301) 1 * 404172-003 . . LENS, GREEN (V83330 #26-1192-300) 1 * 400613-004 . . BULB 1

5-26 402682 . SWITCH, TOGGLE, 3 PDT (V74559, HLA-211-73) 1

5-27 30GH1119 . SWITCH, PUSHBUTTON (V13445 #9095-09) 1

5-28 406815 . BOOT, PUSHBUTTON SWITCH (V13445 #83280) 1

5-29 400642-003 . VOLTMETER, DC (V74542 1

5-30 400641-012 . AMMETER (V74542 1 5-31 180289 . BOARD, PC, OVERVOLTAGE, ASSY. 1

5-32 84A1075 . MOUNT, RUBBER (V5P059 #51083) 7 5-33 181022A-005 . BOARD, PC, REGULATOR 1

287683 . BOARD, PC, REGULATOR

(FOR REPLACEMENT/SUPPLY ONLY) 1

November 1, 2000 Chapter 4-3 Revised 06/01 Page 11

* NOT ILLUSTRATED

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This page intentionally left blank.

Chapter 4-3 November 1, 2000 Page 12 Revised 06/01

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NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

5- 288007-001 CONTROL BOX ASSY (continued) REF

5-34 404065-002 . RECTIFIER, SILICON (V04713 #5DA-10270-2) 2 * 5-35 W10051-010 . CLAMP, WIRE, PLASTIC (V28520 #3334) 2 * 5-36 288012 . WIRE HARNESS 1

5-37 180593-003 . CAPACITOR ASSEMBLY, 100MFD, 350VDC 1

5-38 288016 . HINGE, PANEL MOUNTING 3

5-39 287988 . CONTROL BOX ENCLOSURE 1

5-40 180913-004 . RED PILOT LIGHT 1

5-41 288017 . ARM, TELESCOPIC STAY 1

5-42 287621 . RESISTOR AND DIODE ASSEMBLY 1 * 5-43 286611 . LABEL, BLANK 2

5-44 288019-004 . FUSE, SLO-BLO, 20A 1

* Not Illustrated

November 1, 2000 Chapter 4-3 Revised 06/01 Page 13

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Chapter 4-3 November 1, 2000 Page 14 Revised 06/01

Battery Components

Figure 6

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NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

6- No Number BATTERY COMPONENTS REF

6- 1 281881-001 . BATTERY, 12 V. (V04055 #724 DT) 1 6- 2 288046 . BATTERY CABLE, POSITIVE, ASSY. 1 6- 3 288047 . BATTERY CABLE, NEGATIVE, ASSY. 1 6- 4 287796 . BATTERY HOLD DOWN 1 6- 5 494295 . BATTERY HOLD DOWN BOLT 1

November 1, 2000 Chapter 4-3 Revised 0/01 Page 15

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Chapter 4-3 November 1, 2000 Page 16 Revised 06/01

Muffler Components

Figure 7

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Jet-Ex 5D / Series 500285 / Generator Set

NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

7- No Number MUFFLER AND AIR CLEANER COMPONENTS REF

7- 1 288053-001 . 45 DEG. EXHAUST ELBOW 1 7- 2 288051-001 . FLEXIBLE EXHAUST CONNECTOR 1 7- 3 288050-001 . 2-1/2” TO 3” REDUCER FITTING 2 7- 4 288054-002 . 90 DEG. EXHAUST ELBOW, 2-1/2” 1 7- 5 288044-001 . MUFFLER 1

7- 6 288055-001 . 2-1/2” EXHAUST TUBING 3.5” 7- 7 288059-001 . STAINLESS STEEL HOSE CLAMP 2 7- 8 288055-002 . 3” EXHAUST TUBING 34” 7- 9 288052-001 . CLAMP, 2-1/2” 4

7- 10 288052-002 . CLAMP, 3” 2

7- 11 403483 . FITTING CLAMP 2

* 7- 12 404154-013 . 3” FULL CIRCLE CLAMP 1

* NOT ILLUSTRATED

November 1, 2000 Chapter 4-3 Revised 06/01 Page 17

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Chapter 4-3 November 1, 2000 Page 18 Revised 06/01

Rectifier Assembly

Figure 8

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NOMENCLATURE

FIGURE & HOBART AIRLINE

ITEM NO. PART NO. PART NO. 1234567 EFF QTY

8 - 288306 RECTIFIER ASSEMBLY 1

8 - 1 287184-003 . INSULATOR, CAPACITOR 1 8 - 2 405278-006 . CAPACITOR, 90000MFD, 75 1 8 - 3 286887 . SHROUD, AIR, TOP, RECTIFIER 1 8 - 4 W10869-006 . CLAMP, CAPACITOR 1 8 - 5 402037-004 . GROMMET, RUBBER (V02231 #) 1

8 - 6 16DA3493 . WASHER, INSULATING 6 8 - 7 405154-006 . RESISTOR, 10OHM, 100 WATT (V44655 #61917) 3 8 - 8 401911-005 . BLOCK, TERMINAL, 5 STATION 1 8 - 9 W11114-012 . SCREW, 1/4-20 X 7-1/4 3 8 -10 W11280-015 . NUT, JAM, HEX, 3/4-16 12

8 -11 494681-001 . WASHER, SPRING 12 8 -12 W10931-003 . RECTIFIER, POS., BASE (V59993 #300U30A) 6 8 -13 286884 . BRACKET, ., HEAT SINK 2 8 -14 W10933-003 . RECTIFIER, NEG. BASE (V59993 #300UR30A) 6 8 -15 W11097-007 . SCREW, HHC, 3/8-16 x 2" 1

8 -16 180065 . SHUNT, 2000 AMP 1 8 -17 W11097-007 . SCREW, , 3/8-16 x 2" 5 8 -18 285647 . SHROUD, AIR, BOTTOM, RECTIFIER 1 8 -19 180600 . SPACER, SHROUD 3 8 -20 282239 . HEAT SINK, RECTIFIER, NEGATIVE 1

8 -21 W11097-022 . SCREW, , 3/8-16 x 2-1/2" 4 8 -22 A25 . WASHER, INSULATING 8 8 -23 AW626 . BUSHING, INSULATING (V5E599 # #E48013(M)) 4 8 -24 286813 . HEAT SINK, RECTIFIER, POSITIVE 1 8 -25 W11242-018 . WASHER, FLAT, 3/8 8

8 -26 283063 . SPACER, RECTIFIER 4

8 -27 288008 . RECTIFIER MOUNTING BRACKET 2 * 8 -28 DELETED * 8 -29 288015 . RECTIFIER WIRE HARNESS 1

November 1, 2000 Chapter 4-3 Revised 06/01 Page 19

* Not Illustrated

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1 2

Chapter 4-3 November 1, 2000 Page 20 Revised 06/01

Contactor Components

Figure 9

Hobart Jet-Ex 5D Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual