Technical Manual
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TABLE OF CONTENTS
DUE TO THE DANGERS INHERENT IN THE OPERATION OF ANY mGH VOLTAGE ELECTRICAL EQUIPMENT, A SAFE GROUNDING SYSTEM SHOULD BE USED. SUCH SYSTEM SHOULD INCLUDE GROUND CONDUCTORS IN THE CABLE, A NEUTRAL GROUNDING RESISTOR AND RELATED RELAYS AND SWITCHGEAR. A GROUND CONTINUITY CHECK SYSTEM IS ALSO RECOMMENDED.
READ AND OBSERVE ALL warning signs, they're placed for your health and safety.
In the event you doubt, for any REASON, your ability to safely perform any of the enclosed maintenance and operational procedures as they refer to your machine, please contact Marion Power Shovel Company, Inc.
This manual has been prepared for the standard production machine. Any deviation due to advanced engineering design, optional equipment or the particular requirements of this machine may not be covered.
Additional information that is required will be furnished as soon as such information is available.
SECTION 1
GENERAL INFORMATION
INTRODUCTION· This manual is provided for the guidance of all persons who operate, lubricate, adjust or maintain this machine. The information was prepared with the purpose in mind of furnishing accurately and concisely all the data necessary to the operation and servicing of this machine.
All information, measurements, and specifications herein are in accord with the Marion Power Shovel Engineering Department and should be strictly adhered to in all work on this machine.
PARTS BOOK - THIS MANUAL IS NOT A PARTS BOOK AND SHOULD NOT BE USED IN ORDERING PARTS'
You have been furnished detailed Parts Books which list all parts by group numbers with items and part numbers for your specific machine.
Read carefully the instructions in the front of the Parts Book for ordering parts.
SERIAL NUMBER OF MACHINE - Be sure that the serial number of the machine is given in any letters, telegrams, orders or other communications. Records for each individual machine are filed by serial number and if this number is available the design and original equipment can be quickly and accurately checked.
RIGHT AND LEFT HAND PARTS - On the upper frame, right hand (R.H.) and left hand (L.H.) correspond to the operator's right and left hands when he is facing the bucket while at the operator's controls.
ORDERING PARTS - The Parts Book covering this machine gives complete information on how to order parts. Order carefully so that the right parts in the right quantities can be furnished. Wrong parts, ordered by mistake, which are returned to the company are subject to a rehandling charge.
FURTHER INFORMATION - If further information is required which is not found in the Manual or in the Parts Books, communicate with the Marion Power Shovel Company, Inc., at Marion, Ohio.
CHARGE FOR SERVICE, LABOR, ETC. - No charges for service or labor are accepted unless the work has been previously authorized by the company in writing.
STANDARD WARRANTY - Marion Power Shovel Company, Inc. guarantees the equipment manufactured by it to be free from defects in material and workmanship under normal use and service, its obligation under this warranty being limited to making good at its factory any part or parts thereof manufactured by it which shall, within six (6) months after delivery to Buyer, be returned to it, with transportation charges prepaid, and which its examination shall disclose to its satisfaction to have been thus defective, this warranty being expressly in lieu of all warranties, express or implied, and of all other obligations or liabilities on Marion Power Shovel Company's part.
Marion Power Shovel Company, Inc. shall not be held responsible or liable in any event for special or consequential damages, arising from any cause whatsoever, and Buyer agrees to indemnify and save Marion Power Shovel Company, Inc. harmless therefrom.
Marion Power Shovel Company, Inc. makes no guaranty or warranty, express or implied, as to adequancy, fitness, quality, or performance of any machinery, equipment, apparatus or accessories not manufactured at its own factory which are subject only to such guaranty as may be made by the respective manufacturers thereof.
The company reserves the right to improve or change the design of its products and specifications thereof and the company shall incur no liability thereby or any obligations to install such improvements on products previously sold.
SAFETY PRECAUTIONS - The usefulness of this machine depends entirely on the man at the controls. The operator is its brain. He must think safety and work safely.
Neatness and safety go hand in hand. Good housekeeping habits should be developed.
1. Keep'the floor clean and free from oil and grease.
2. Keep the walkways clean, clear and free from obstructions.
3. Prevent the accumulation of grease and oil around bearings and gears. Grease and oil collect and hold grit and dirt which work into finely machined parts.
4. A clean machine is easier to operate-easier to inspect-easier to service.
5. Keep hands and clothing away from moving parts.
6. Replace guards, inspection plates, access covers, etc., promptly after reason for moval is accomplished.
Strip mining equipment is subject to tremendous stresses and shock loads. These stresses are thoroughly studied and considered in the design and building of Marion equipment.
SECTION 1
GENERAL INFORMATION INDEX
Introduction
Parts Book
Serial Number of Machine
Right and Left Hand Parts
Ordering Parts
Fu rther Informati on Charge for Service, Labor, Etc.
Standard Warranty
Safety Precautions
Page 1
Page 1
Page 1
Page 1
Page 1
Page 1
Page 2
Page 2
Page 2
This machine is built with an ample reserve of power and strength and is well fitted to meet the demands of its task.
However, the Marion engineers cannot foresee the conditions imposed by abuse, mismanagement and neglect. These factors are more damaging to any piece of equipment than years of continuous operation and normal wear.
Care, sound judgment and reason are an economic necessity in the operation of power equipment.
1. Carefully read this Manual and Parts Book.
2. Lubricate regularly. Establish a systematic procedure and stick to it.
3. When lubricating, check all bolts, nuts, locknuts and cotter pins.
4. Keep loose objects in tool box or in suitable enclosure or cabinet.
5. Always replace guards.
6. Always watch your clearance when swinging.
1. Service or lubricate parts that are moving.
2. Leave the load suspended in air.
DON'T APPL Y SWING BRAKES WHILE MACHINE IS ROTA TING, EXCEPT IN EMERGENCY.
SECTION 2
ELECTRICAL MAINTENANCE INDEX
Care of D.C. Motors and Generators
Brushes
Commutators
Lubrication of Bearings
Feeder Cable
Power Line Grounding Circuit
Page 1
Page 1
Page 3
Page 4
Page 6
Page 6
SECTION 2
ELECTRICAL MAINTENANCE
CARE OF D.C. MOTORS AND GENERATORS - One of the most essential points to watch regarding the care of the electrical equipment, especially D.C. equipment, is absolute cleanliness. Too much emphasis cannot be given to pointing out the necessity of keeping the mqtors and generators clean and free from dirt, oil or grease.
There are a few troubles common to both motors and generators which the operator should be able to recognize and remedy. Normally the D.C. motors and generators give very little trouble, but there are times when somethinghappens that can be taken care of quickly by anyone. The most serious trouble should be handled by a competent electrician. If the commutation is bad and cannot be corrected by simple remedies, the electrical equipment manufacturer should be consulted.
BRUSHES, If there is an excessive amount of arcing between the brushes and commutator while the machine is operating under normal loads and speeds, the brushes should be inspected and checked for the following:
1. See that they are not sticking in the holders.
2. Make certain the contact surfaces of the brushes are clean and the brushes are making fUll contact on the commutator.
NOTE: This can b(! determined by removing the brush and looking at the brusb surfaces. Where tbe brusb bas been rubbing, tbe surface is smooth and polished. Any portion wbicb is not in cont(1ct witb the commutator will bave a dark, rough appearance.
Excessive arcing may also be caused b',( loose brush holder studs which will throw the brushes out of line. This causes the brushes to ride on the heel or toe, thus moving them out of normal commutating plane, which usually results in considerable sparking. This can be corrected by tightening the brush holder in its correct position.
The brush holder yoke set screw may become loose, permitting the brush yoke to rotate and to shift all the brushes. When the brushes are moved out of their normal position, they will arc badly. The simple correction, of course, is to move the brush holder back into position.
The spring pressure should be even on all brushes. The exact amount of brush pressure varies with different types of units so the factory should be called upon to give definite information on the brush pressure required for a given unit. If the brush springs are set Qriginally at fl certain point, it is reasonably certain that this is the correct pressure and the brush pressure sholJld always be kept at this point when installing a new brush. The initial brush pressure should be the same fqr all brushes on a given generator or motor.
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