Minster OBI Series User manual

Manual No. 1010C
MINSTER®
8952-399 $15.00
Service
Manual
OBI/OBS SERIES PRESS
MODEL

Manual No. 1010C
MINSTER®
8952-399 $15.00
Service
Manual
OBI/OBS SERIES PRESS
MODEL

A - 2
SERVICE
This manual has been prepared to furnish the press
user with sufficient information to set up, lubricate, con-
nect air and electrical services, and stroke the press
without outside assistance. Other valuable information
detailing press inspection, service and repair proce-
dures, as well as a spare parts list is included as a sep-
arate portion of the composite Service Manual.
Should additional maintenance assistance be required,
please contact the Minster Service and Repair Parts
Department. Personnel in this department are prepared
to aid press users in retaining the dependable perfor-
mance expected from their Minster equipment. Your
inquirywill receive prompt and courteous attention. Field
service personnel are also available upon request.
DESIGN CHANGES
Design changes between the press you received and
the equipment illustrated in this manual are the result of
continuing design improvement or special arrangement
contracted at the time of purchase. Instructions are pro-
vided for the standard Minster Model 101 OBI/OBS
Series press. Minster reserves the right to discontinue
or change specifications, designs and materials, with-
out notice, consistent with sound engineering principles
and recognized modern practices.
IMPORTANT
In order to more clearly show details of the Minster
Model101OBI/OBS Series press,somecovers,shields,
doors and guards have either been removed or left in the
“open” position for certain illustrations used in this man-
ual. All such covers and protective devices must be
closed and/or installed in the correct position before
attempting to operate the press. Failure to follow this
instruction could result in personal injury or damage to
the equipment.
SERIAL NUMBER
When contacting Minster (by fax, letter or telephone) for
repair parts or information concerning your press,
please furnish the press serial number. This number is
stamped on the press Identification Plate and also
stamped on the frame adjacent to one of the gibs. The
number also appears on the press specification sheet
included with press service manual. Manufacturing
records, technical data and special information (in our
possession) can be located quickly when the serial
number is known.
Copyright © 2008 by
THE MINSTER MACHINE COMPANY
Minster, Ohio 45865
Printed in the United States of America
Reproduction or use, without express permission,
of editorial or pictorial content, in any manner, is prohibited.

This manual has been especially prepared for those persons responsible for the SAFE operation and maintenance
of Minster Model 101 OBI/OBS Series power presses. The technical information which it contains has been corre-
lated, where possible, into related sections. Supporting illustrations and charts are also included to provide readers
with quick reference to a given component or activity and to show the association of that component with related
parts. Additionally, illustrations used herein are representative of equipment available at the time of publication.
Throughout the manual, warnings are included as a part of the servicing procedures. If should be noted that some
warnings refer to functions other than those required for direct operation of the press. Warning signs are also mount-
ed at strategic points on the press to remind personnel of hazards that may not be obvious when, and if, improper
procedures are followed. The objective here is to establish SAFE operating procedures for all personnel associat-
ed with POWER PRESSES — and to PREVENTACCIDENTS.
Make every effort to keep all presses in good working condition and SAFE FOR PRODUCTION. If is imperative that
the press user establish and follow a program of periodic and regular inspections to make certain the press and its
auxiliary equipment are in a safe operating condition. Employers must keep records of those inspections and of the
maintenance work performed.
We wish to acknowledge our indebtedness to the engineers, service personnel, and press users who contributed
many valuable suggestion for the manual. Their cooperation is sincerely appreciated.
A - 3
REGARDING WARRANTY
TERMS OF THE WARRANTYARE FULLY DOCUMENTED IN THE MINSTER WARRANTY.
A COPY OF THAT WARRANTY IS INCLUDED IN THE COMPOSITE SERVICE
MANUAL; ADDITIONAL COPIES ARE AVAILABLE UPON REQUEST.
PREFACE

A - 4
SECTION B (Pages B-1 thru B-3)
Press Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Preparation For Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Press Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
SECTION C (Pages C-1 thru C-11)
Press Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Shipping And Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Unloading And Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Press Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Threaded Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Minster Standard Torque Value Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Press Foundation And Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
InstallingAnd Leveling The Press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Front Panel And Lube Line Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Drive V-Belt Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Digital Meters (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Digital Percent Of Load Meter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
To Calibrate The Digital Percent Of Load Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Servicing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Digital Speed Meter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
To Calibrate The Digital Speed Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Servicing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Remote Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Flywheel Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
To Check Flywheel Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Air Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Inclining The Press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
Auxiliary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-11
Pre-Start Lubrication Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-11
SECTION D (Pages D-1 thru D-10)
Press Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Service And Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Reservoir Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Filling And Maintaining Lube Reservoir Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Initial Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-3
Oil Cleanliness And Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5
Waste Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5
Changing Oil In The Lube System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5
To Change Oil In The Lube System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5
Lube System Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6
To Replace The Lube Unit 25 Micron Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6
Lube Distribution & Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6
Metering Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6
To Check The Metering Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6
Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7
CONTENTS Page

SECTION D (Continued)
To Check The Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7
Minster Static Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7
To Check The Static Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-8
Summary Of Lubrication Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-9
Lubrication Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-10
SECTION E (Pages E-1 thru E-15)
Press Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Lockable Switches & Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Servicing The Pneumatic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Air Lockout Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Air Pressure Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Air Pressure Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Solenoid Air Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Air Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
Air Line Lubricators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
To Fill TheAir Line Lubricators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
To Adjust The Clutch/Brake Air Line Lubricator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-6
To Adjust The Slide Adjust Motor Air Line Lubricator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-6
Counterbalance System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-7
Theory Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-7
Air Pressure Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Determining Die Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Alternate Methods Of Air Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Balancing Slide And Die Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Percent Motor Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Effects Of Improper Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
Service And Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
Re-applying Air After Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
To Check For Air Leaks In The Counterbalance System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
To Replace Slide Counterbalance Cylinder Air Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
Flywheel Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-10
Flywheel Brake Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11
Die Cushion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11
To Check For Air Leaks In The Die Cushion System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11
To Replace Rail Mounted Die Cushion System Air Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11
To Replace Trunion Mounted Die Cushion System Air Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-12
Air Reservoir Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
Safety Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
Fusible Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
Drain Cocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
Air Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
A - 5
CONTENTS Page

SECTION F (Pages F-1 thru F-11)
Servicing The Slide Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
Gib Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
To Check Gib Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
To Adjust Gib Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3
Slide Angularity And Parallelism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3
To Check Slide Parallelism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3
To Check Slide Vertical Angularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
Calibration Of The Shutheight Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5
To Check Calibration Of The Shutheight Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6
To Calibrate The Shutheight Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6
Connection Cap Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6
Slide Ball Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7
To Check Slide Ball Box Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7
To Adjust Slide Ball Box Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8
Crossbar Knockout Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8
To Adjust Crossbar Knockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9
Cam Knockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9
To Adjust The Cam Knockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9
Slide Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-10
Factor Affecting Parallelism And Vertical Movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-11
SECTION G (Pages G-1 thru G-6)
Servicing The Frame And Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2
Relieving A Slide From A “Stuck On Bottom” Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2
Using Full Line Air Pressure To Free A “Stuck On Bottom” Press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2
Using The (Optional) Clutch Bumping Arrangement
To Free A “Stuck On Bottom” Press (Flywheel Press Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2
Total Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3
To Check Total Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3
Individual Bearing Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4
To Check Individual Bearing Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4
Main Bearings And Connection Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6
Bushing Fitting Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6
Split Main And Connection Bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6
SECTION H (Pages H-1 thru H-8)
Press Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-2
Tonnage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-2
Tonnage/Stroke Relationship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-3
Press Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-4
Punch Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-8
Energy Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-8
SECTION I (Pages I-1 thru I-13)
Inspection & Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2
A - 6
CONTENTS Page

Periodic Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2
Spare Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-3
Press Inspection Check List & Maintenance Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-4
Mechanical Press Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-4
Weekly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-4
Monthly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5
Semi-Annual Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5
Pneumatic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7
Weekly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7
Monthly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7
Electrical Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9
Weekly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9
Monthly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9
Lubrication Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11
Weekly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11
Monthly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11
Quarterly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11
Annual Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11
A - 7
CONTENTS Page

SECTION B
This Section Contains The Following: Page
Press Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Preparation For Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Press Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
B - 1

B - 2
PRESS IDENTIFICATION
(Optional) Counterbalance Assembly
(N/A On Super Speed Press)
Main Drive Motor
Flywheel Cover
Lifting Lug
Limit Switch
Front Cover
Slide
Bolster
Plate
Air Line Lubricator
Clutch Solenoid
Valve
Frame
~
~~
~

!WARNING
NEVER PLACE HANDS OR ANY OTHER PART OF THE BODY UNDER
THE SLIDE OR WITHIN THE DIE AREA.
OPERATE, SERVICE OR ADJUST THIS PRESS, OR INSTALL
DIES, WITHOUT PROPER INSTRUCTIONS AND WITHOUT FIRST
READING AND UNDERSTANDING THE INSTRUCTIONS IN THE
OPERATION AND/OR SERVICE MANUAL.
INSTALL DIES OR SERVICE THE PRESS WITH THE FLYWHEEL
IN MOTION, MOTOR ON, OR THE SLIDE IN AN UNBLOCKED
POSITION.
NEVER
NEVER
NEVER REMOVE THIS SIGN, THE OPERATION MANUAL, OR THE SER-
VICE MANUAL FROM THE PRESS.
NOTE: IT IS THE EMPLOYER’S RESPONSIBILITY TO ENSURE USAGE
OF ALL GUARDS, SAFETY DEVICES, OR TOOLS THAT MAY BE
NECESSARY AND/OR REQUIRED BY ANY PARTICULAR USE
AND/OR OPERATION TO IMPLEMENT THE ABOVE.
NEVER remove the Operation or Service Manual from press.
PREPARATION FOR USE
NOTE: The press is not ready for production operation until the following conditions have been observed and all
installation work performed in the order listed.
CAREFULLY PERFORM PRESS INSTALLATION PER INSTRUCTIONS
Install the press according to instructions given in the “Installation” section of this manual. Refer to the “Initial Lubrica-
tion” section, being certain to lubricate the press thoroughly. DO NOT set dies or attach any auxiliary equipment until
instructed to do so; however, if the press was received with auxiliary equipment already installed, DO NOT remove.
UNDERSTAND PRESS OPERATING PROCEDURES
Read and understand all information provided in the Model 101 OBI/OBS Series Press “Operation” Manual. Learn
to Inch and Stroke the slide before the dies are installed.
CHECK ALL OPERATING ADJUSTMENTS
Make certain that all operating adjustment procedures have been satisfactorily performed. Learn to properly adjust
(and lock) slide height and know how to adjust the air pressure. Before installing dies, check slide parallelism and
gib adjustment to make certain factory settings were not disturbed during shipment. Readjust only if necessary.
THEN . . .
Set dies. Adjust slide shutheight to the proper setting. Adjust pressure regulators for correct air pressure at clutch,
counterbalance and die cushion if used.
Install auxiliary equipment and adjust or synchronize, as necessary, for proper operation with the press.
Check point-of-operation safeguarding being used for the specific operation being undertaken.
OBSERVE ALL SAFETY PRECAUTIONS
Check the point-of-operation safeguarding and make certain that it is appropriate for the operation being undertak-
en. Refer to the “MINSTER Power Press Safety Manual No. 805” for additional safety related information.
AND DON’T FORGET . . .
It is user-management’s responsibility to make certain that all point-of-operation guards or devices are used,
checked, maintained, and where applicable, adjusted on every operation performed on a production system for
every individual exposed to a point-of-operation hazard.
B - 3
Manual Pocket
Electrical Control
Pedestal

B - 4
Press operators and die setters can do much to
make their own jobs safer by regularly demonstrat-
ing safety awareness and by taking a positive atti-
tude toward the prevention of accidents. Die setters
should NEVER attempt to install, adjust, or remove
dies without first shutting off power to the press and
waiting for the flywheel to stop. Press operators should
NEVER place their hands or any part of their bodies
with the point of operation.
Press user management must assume the respon-
sibility for safe operation of power presses. All
presses must be properly maintained and equipped
with effective die guards or point-of-operation safety
devices. When dies are designed, the importance of
simplified feeding, part ejection and safeguarding must
be considered. Essentially, the complete operation
should make it unnecessary for operators to place their
hands,oranypartof their bodies, with the point of oper-
ation; secondly, the die should be fully guarded to pre-
vent them from doing so. Dies that cannot be fully
guarded, because of the nature of the operation,
should be fed by methods making it unnecessary for
the operator to place his hands within the point of oper-
ation and safeguarded, in accordance with the applica-
ble Federal and State Regulations, with a safeguarding
device.
Personal protective equipment such as safety hel-
mets, tongs, gloves, hand pads, spats, and protec-
tive sleeves must also be provided as required to
suit the operation. Don’t forget ear protection. Ear
plugs, muffs or noise enclosures should be used where
noise is above critical levels. And, to realize maximum
benefit from safeguards, make frequent evaluation
checks — especially during actual production runs.
Correct any unsafe practices or situations immediately.
The formation of an organized safety program is
highly recommended.Asafety committee — appoint-
ed by and responsible to management — should
supervise the program and have regularly scheduled
meetings. Through this committee, a good safety pro-
gram can be constantly reviewed, kept up-to-date and
effective. Minutes of all meetings should be recorded
for future reference — they can be very beneficial.
Additional safety suggestions are presented in the
“Minster Power Press Safety Manual No. 805.”This
manualwaspreparedasaguideforthosepersonswho
use, service and supervise the operation of mechanical
power presses. It is included as a part of the compos-
ite press Service manual.
PRESS SAFETY
NEVER operate, service or adjust the machine, or install dies without proper instructions and without first
reading and understanding the instructions provided in the Service and Operation Manuals.

SECTION C
This Section Contains The Following: Page
Press Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Shipping And Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Unloading And Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Press Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Threaded Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Minster Standard Torque Value Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Press Foundation And Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
InstallingAnd Leveling The Press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Front Panel And Lube Line Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Drive V-Belt Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Digital Meters (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Digital Percent Of Load Meter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
To Calibrate The Digital Percent Of Load Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Servicing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Digital Speed Meter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
To Calibrate The Digital Speed Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Servicing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Remote Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Flywheel Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
To Check Flywheel Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Air Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Inclining The Press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
Auxiliary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-11
Pre-Start Lubrication Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-11
C - 1

SHIPPING AND RECEIVING
Each Minster Model 101 OBI/OBS Series press is
carefully prepared for shipment to protect the press
during transit and to enable the customer to install the
press with a minimum of reassembly when it arrives at
its destination.
When the press is received, it should be inspected
immediately for any visual signs of damage. If any dam-
age has occurred, notify MINSTER and the CARRIER
for claims inspection. However, with F.O.B. shipments,
a claim must be presented to the CARRIER by the cus-
tomer since title of the equipment changes to the cus-
tomer when shipment is accepted by the carrier.
UNLOADING AND LIFTING
REMOVE all accessories and boxes attached to the
skids so that these parts will not be damaged in han-
dling the press. The press should remain on the skids
until it is placed under the handling equipment.
WARNING
MAKE CERTAIN THAT THE CRANE OR HOIST
AND ASSOCIATED CABLES, CHAIN AND HOOKS
ARE CAPABLE OF SAFELY LIFTING THE WEIGHT
INVOLVED.
Two (2) lifting lugs are provided on the top of the press.
(See Figure 1C.) Riggers should be cautioned never to
place lifting slings around the press crankshaft. Work-
men should also be instructed to use adequate block-
ing when placing slings around major frame parts to
prevent cables from crushing oil lines or damaging
electrical conduit and/or other exposed components.
CAUTION
NEVER USE A FORKLIFT UNDER THE SLIDE
ASSEMBLY TO LIFT THE PRESS OR DAMAGE TO
THE SLIDE COULD OCCUR.
PRESS WEIGHT
The following table of press weights includes all facto-
ry supplied items mounted on the press when it is
assembled. All weights are approximate and do not
include the additional weight of dies, feeds, or other
customer-added equipment.
CLEANING
Before installing the press, clean it thoroughly to
remove cinders, rust, salt, sand and other soil that may
have accumulated during shipment. Carefully inspect
and clean all exposed areas where foreign particles
may have adhered. Use a good grade of commercial
solvent to remove slushing and rust-preventing com-
pounds. Use care when applying cleaning solvents to
the press. Make certain that the solvent used will not
cause damage to any seals that it might contact.
C - 2
PRESS INSTALLATION
Lifting Lug
(One Each Side)
Figure 1C. Lifting lug location.
!
!
PRESS WEIGHT CHART
PRESS SIZE APPROXIMATE WEIGHT
POUNDS KILOGRAMS
No. 4 Flywheel Type 7,500 3,402
No. 5 Flywheel Type 10,000 4,536
No. 6 Flywheel Type 13,000 5,897
No. 6 Geared Type 14,200 6,441
No. 7 Flywheel Type 18,000 8,165
No. 7 Geared Type 19,000 8,618

WARNING
CLEANING FLUIDS MAY BE TOXIC AND/OR
FLAMMABLE AND CAN CAUSE SERIOUS OR
FATAL INJURY. FOR SAFETY, USE ONLY WITH
ADEQUATE VENTILATION; AVOID CONTACT WITH
SKIN;AVOID INHALATION OF FUMES AND DO NOT
EXPOSE TO FLAME OR SPARKS.
Use a stiff brush to clean hard-to-reach corners of the
press; lint-free rags are suitable for cleaning flat sur-
faces. Then apply a coating of light oil to all unpainted,
exposed surfaces to prevent rust and corrosion.
ASSEMBLY
Minster Model 101 OBI/OBS Series presses are nor-
mally shipped completely assembled, except for the
front cover, and optional feed equipment. These items
are usually removed to provide easier handling and
better protection during transit. Please refer to specific
instructions pertaining to reassembly of these items.
Minster field service engineers are available to check
over the complete installation.They will assist in the ini-
tialstart-upandalsoinstructinterestedpersonnel in the
proper operation and maintenance of the press. Con-
tact Minster’s Service Department to schedule a field
service engineer if required. Please allow at least one
week to complete travel arrangements.
THREADED FASTENERS
SAE Grade 5 Standard threaded fasteners (bolts,
screws, etc.) are used on Minster Model 101 OBI/OBS
Series presses. When assembly torques greater than
can be tolerated by Grade 5 hardware are required,
Grade 8 fasteners are used. When a fastener is
replaced (due to wear or damage), make certain to use
a new fastener meeting the specified standard of the
fastener being replaced.
The fasteners are tightened to the recommended
Minster Standard torque value at the factory prior to
shipment. Whenever any fasteners are loosened or
removed to facilitate maintenance and/or repair proce-
dures, it is imperative that they be tightened to the prop-
er torque value.Also, apply LoctiteAdhesive Grade 242
(BlueLiquid)toallthreaded fasteners.Thechart,shown
below, lists the recommended torque values for fasten-
ers used on Model 101 OBI/OBS Series presses.
NOTE: Certain applications (described in this manual)
may require a torque value different from the
value shown in the chart. In that case, the
required torque value will be specified for the
application.
C - 3
!Minster Standard Torque Value Chart
SAE GRADE 5 HEX. HEAD CAP SCREW
TORQUE VALUES (LUBRICATED)
SCREW SIZE FT-LBS. N-m
1/4 - 20 (.250 6.3 8.5
5/16 - 18 (.312) 13 18
3/8 - 16 (.375) 23 31
1/2 - 13 (.500) 55 75
5/8 - 11 (.625) 110 149
3/4 - 10 (.750) 200 271
7/8 - 9 (.875) 300 407
1.00 - 8 480 651
1-1/4 - 7 (1.250) 840 1139
1-1/2 - 6 (1.500) 1460 1979
1-3/4 - 5 (1.750) 1714 2324
2.00 - 4.5 2578 3495

Correct installation is an important step in the satisfac-
tory long term operation of your press. The type of
mounting can have an effect upon the operating effi-
ciency, press alignment, stability, and noise and vibra-
tion levels. In order to provide the best and most
economical installation, physical conditions at the site
and operating characteristics of the press, as well as
the type of work being performed, must be considered.
Because of the many variables associated with soil
conditions, press application, and the type of work per-
formed, it is not possible to prepare a universal foun-
dation plan that is dimensionally and economically
correct for all. It is suggested by Minster that the user
consult an experienced professional in the field of
foundation layout when considering a suitable
foundation for the press.
TheMinsterModel101OBI/OBS Series press must be
positively anchored to the floor. Instructions for proper
installation are provided below.
INSTALLING AND
LEVELING THE PRESS
It is extremely important that each of the press feet
bear the intended proportionate share of the load
and that they be mounted in an undistorted plane.
Leveling of the press with a precision machinery level
provides a convenient means of checking for any dis-
tortion or twisting of the press frame.
At the time of installation, the press should be carefully
leveled in both directions — left-to-right and front-to-
back — in the exact location where the press will be
installed. Use a precision machinery level and level
the press following the recommended procedure.
Follow the procedure outlined below to install and level
the press.
1. Make certain the area of the foundation on which
the press is to be mounted is flat and on the same
plane. This is required in order to make certain that
all four (4) press feet are bearing evenly to avoid
twisting the frame.
2. Make certain the area of the foundation slab on
which the press is to be mounted is free of debris.
3. Position the press on the foundation in the exact
location where the press will be placed.
4. Clean the top surface of the bed or bolster plate
thoroughly so that the level readings are accurate.
5. Position a precision machinery level on the top
surface of the bed with the length of the level paral-
lel to the front edge of the bed. Take readings at the
front, rear, and on both sides of the bed or bolster
plate. (See Figure 2C.)
6. If the press is low on one side, the various readings
will indicate this and correction can be made by plac-
ing steel shims between the press feet and the foun-
dation. Correction may be required under one or
more of the press feet. The press should be level
within .001 inch per foot (0.025 mm per each 300
mm) of bed width in the front-to-back direction. Make
certain that the level readings are exactly the
same as the level is moved from front-to-back.
NOTE: If shims are added under the press feet for
leveling purposes, the area of each shim
should be equal to that of the press foot.
7. Reposition the precision machinery level so that its
length is parallel to the side of the bed or bolster
plate and take several readings as the level is
moved to the opposite side. If the press is low on
one side, make the necessary corrections as
explained in Step 6.
8. When the press is level, it must be bolted to the
floor in the manner described on the Foundation
Layout which is included in the composite Service
Manual (furnished).
NOTE: Due to the unequal left-to-right weight ratio
and the unequal front-to-rear weight ratio of
the gap frame design, the use of press
shock mounts to suppress vibration are
absolutely not recommended due to the
C - 4
PRESS FOUNDATION & MOUNTING
Figure 2C. Leveling the press.

rocking motion that could occur from their
use. Such rocking motion may induce
accelerated bearing wear. To suppress
excessive vibration from the operation of
your OBS stationary (not inclinable) press,
only resilient laminated fabric or rubber
pads are recommended for use, such as
Fabreeka®or Unisorb®type brands. See
WARNING posted on inclinable Minster
OBI presses and as also found within the
“Minster Power Press Safety Manual No.
805” in section entitled “Signs of Safety.”
FRONT PANEL AND
LUBE LINE INSTALLATION
The press front panel was removed, and lube lines
relocated, to prevent damage during shipment. The
lube lines may be installed in their proper location and
the front cover may be reinstalled following the direc-
tions below.
1. Relocate the lube lines. The lines must be relocat-
ed from their shipping position within the press
crown cavity, and reinstalled on the front of the
press as shown in Figure 3C. Use line clips and
hardware provided.
2.
Reinstall the front cover. Position the cover on the
front of the press and secure with four (4) .375” - 16
x.750”longHex. Head Cap Screwsandflatwashers.
DRIVE V-BELT INSTALLATION
The drive v-belts transmit energy from the main drive
motor to the press flywheel. Install the drive v-belts fol-
lowing procedure outlined below.
WARNING
DISCONNECT POWER TO THE PRESS, LOCK THE
DISCONNECT SWITCH IN THE OFF POSITION,AND
ATTACH WARNING TAG TO PREVENT ACCIDEN-
TAL STARTING OF THE MAIN DRIVE MOTOR
WHILE INSTALLING, ADJUSTING, OR INSPECTING
THE DRIVE BELT.
1. Using a large machinists square, check alignment
of the motor sheave with the flywheel. If motor
sheave and flywheel do not align, loosen the motor
mounting bolts and shift the motor until both sets of
grooves are aligned accurately; otherwise, belts will
not track straight and will wear out rapidly. Misalign-
ment of the sheaves will also cause needless belt
groove wear and motor bearing damage. After
sheaves are correctly aligned, tighten the motor
mounting bolts fully.
2. Usingtheadjustingscrewnuts,lowerthemaindrive
motor toward the flywheel until v-belts can be
slipped over motor sheave and flywheel without
strain. (See Figure 4C.)
WARNING
DO NOT FORCE THE V-BELTS OVER THE SHEAVE
GROOVES.
C - 5
Install Lube
Lines Here
(Under Clamps)
Figure 3C. Lube line installation.
Figure 4C. Installing v-belts.
!
Adjusting
Screw Nuts
V-Belt
!

3. Turn adjusting screw nuts to tighten belts. Belt tight-
ness is correct when belts can be depressed about
one-half inch — with normal thumb pressure —
at a point midway in the belt span. Also make cer-
tain that the motor bracket is level. Tighten adjust-
ing screw jamnuts when belt adjustment is correct.
4. Observe power supply voltage, phase and frequen-
cy. Connect the electrical supply leads to the drive
motoraccordingtothepresswiringdiagramandthe
interconnection diagram on the motor nameplate.
Refer also to “Electrical Connections” and “Fly-
wheel Rotation” sections of this manual before the
motor leads are connected.
ELECTRICAL CONNECTIONS
1. Make certain that the factory line voltage is correct
for the press. Electrical requirements for the press
are stamped on the Control Data Plate located near
the disconnect switch handle on the control enclo-
sure door. Voltage requirements are also listed on
the Specification Sheet in the press service manual.
2. Refer to the wiring diagram shipped with the press
for the correct procedure to follow when connecting
incoming electrical power.
WARNING
NEVER CONNECT INCOMING ELECTRICAL
POWER TO THE FUSE HOLDER; THIS WILL PRE-
VENT THE DISCONNECT SWITCH FROM TURN-
ING OFF POWER WHEN THE SWITCH IS IN THE
OFF POSITION.
3. Make certain that all electrical enclosures and the
press frame are properly connected to earth
ground with an electrical conductor sized to comply
with recognized codes. The installation should be in
accordance with your local electrical codes.
4. Connect the “T” leads to the main drive motor.
Check the motor identification plate to make certain
that the electrical hookup is correct for the voltage,
phase and frequency of the current to be applied.
After the “T” leads are connected, check motor rota-
tion for proper electrical phasing. Also, if the press
is equipped with an Eddy Current Variable Speed
Drive, the coupling control leads must be connect-
ed before flywheel rotation can be checked. (Refer
to “Flywheel Rotation” section, page C-9, for the
proper method of checking flywheel rotation.)
5. If a Minster Eddy Current Coupling is furnished, a
separate service manual will be provided to fully
explain the operation, adjustment, and trou-
bleshooting procedures for the control. Coupling
excitation and related speeds of the Eddy Current
Variable Speed Drive are controlled by this solid
state control.
6. If any auxiliary equipment is furnished, it will nor-
mally require a separate electrical hookup. When
connecting electrical service to these items, follow
the instructions supplied by the manufacturer of the
auxiliary equipment.
DIGITAL METERS (Optional)
The press electrical equipment was checked and veri-
fied at Minster prior to shipment. If you determine that
the accuracy and/or operation of either of the digital
meters is questionable, perform the procedure outlined
below on the applicable meter.
DIGITAL PERCENT OF
LOAD METER CALIBRATION
The switch and potentiometer used for calibration of
the Digital Percent Of Load Meter are accessible
through a cutout in the rear cover plate of the unit. If the
installation does not permit access to these controls,
temporarily remove the meter mounting screws and
position the unit so that the controls can be adjusted.
WARNING
WHEN PERFORMING CALIBRATION ADJUST-
MENTS, POWER IS PRESENT IN THE PRESS CON-
TROL AND AT THE METER TERMINAL STRIP. USE
EXTREME CAUTION WHEN CALIBRATING THIS
UNIT TO PREVENT ACCIDENTAL ELECTRICAL
SHOCK.
Equipment Required:
•Clamp-on type ammeter having a range greater than
the full load current rating of the main drive motor.
•Small flat blade screwdriver.
C - 6
WARNING
VOLTAGE THAT COULD BE FATAL
TO HUMAN LIFE IS PRESENT
WITHIN THE ELECTRICAL CONTROL
CIRCUITS.
ONLY AUTHORIZED, EXPERIENCED PERSONNEL
SHOULD ATTEMPT THE INSTALLATION AND/OR
SERVICING OF ELECTRICAL EQUIPMENT.
!
!!

To Calibrate The Digital
Percent Of Load Meter:
1. Before calibrating the meter, it will be necessary to
know the 100% or full load current rating of the drive
motor. This amperage figure is shown on the motor
specification tag.Take care when checking this item
to record only the full load current for the voltage
being applied. If the motor’s full load current (FLA)
is not known, check the specification tag before
starting the motor and record the amount.
2. Start the main drive motor. If output speed is
adjustable, set the speed control to a mid-range
position. Then allow time for the flywheel speed to
stabilize.
3. Using a clamp-on type ammeter, measure the cur-
rent flowing through one of the drive motor line
leads. Record this reading.
NOTE: The slide must not be cycled during this
amperage measurement.
4. To determine the percentage of full load current
being used by the motor, divide the ammeter read-
ing recorded in Step 3 by the full load current (FLA)
stamped on the motor specification tag.
Example:
FLA specification of the drive motor = 48 amps.
Ammeter measurement = 21.6 amps.
Percentage of load = 21.6 ÷ 48 = .45 or 45%
Therefore, the motor is using 45% of its full load
current.
5. While holding motor current at the same rate as
recorded in Step 3, adjust potentiometer and the
High/Low Range Switch (this switch effects circuit
adjustment gain only) so that the meter will display
the Percent Of Load amount calculated in Step 4.
SERVICING PROCEDURE:
In the event a problem is encountered with the Bul.
490-0248 Digital Percent Of Load Meter, perform the
following tests:
1. Check for the presence of 110 volts A.C. between
the “A.C.” meter terminals 1 (+) and 2 (-). (Voltage
must be present.)
2. Check for the presence of signal voltage between
themeter“INPUT”terminals3(+)and4(-).(Voltage
should range between 0 and 10 volts A.C. with the
drive motor running.)
Results Obtained:
If signal voltage is not present, or is present, but erratic:
1. Check for loose or broken wires attached to the cur-
rent transformers.
2. Check the current transformers for possible dam-
age, open or shorted windings.
3. If the power supply and signal voltages are present,
but the meter does not function, return it to Minster
for repair.
NOTE: Field repair of the Minster Bul. 490-0248
Digital Percent Of Load Meter is not recom-
mended; however, a parts list is available
from Minster upon request.
4. IftheDigitalPercentOfLoadMeterisequippedwith
an optional audible warning device, but the device
does not sound when the percentage of load
exceeds 100%, perform the following tests:
A. Check for the presence of 14 volts D.C.
(approx.) between terminals 5 (+) and 6 (-) on
the meter terminal strip at the same time the
meter is displaying a load in excess of 100%.
NOTE: Motor current will normally exceed
100% for full load while the motor is
accelerating from startup. If the press is
equipped with an Eddy Current Variable
Speed Drive, and the coupling control is
equipped with a torque limiter board, it
is normal for the motor current to pulse,
repeatedly, up to values nearing 150%
of full load while the output speed is
accelerating.
Results Obtained:
A. If proper voltage is read between “WARNING
Device” terminals 5 (+) and 6 (-) when the meter
is displaying a load of 100% or more, but the
audible warning device does not sound, replace
the audible warning device.
NOTE: Replace the audible WARNING device
with an identical type only.
B. If the meter indicates a current draw in excess of
100%, but no voltage is present between
“WARNING Device” terminals 5 (+) and 6 (-),
even with the audible device disconnected,
return the meter to Minster for repair.
When returning a unit to Minster for repair, make cer-
tain it is carefully packaged to protect it from damage
during shipment. Include, with the unit, a description of
the problems encountered and the serial number of the
press on which it is used. Also include your purchase
order covering the work to be performed and any spe-
cial shipping instructions concerning return of the unit.
C - 7