All of Stamtec's mechanical presses come standard with hydraulic overload protection systems. View our slide show to learn more about what the systems do and how to maintain them. For more information on our mechanical presses, visit https://www.stamtec.com/mechanical-presses

1. STAMTEC, INC. • 931-393-5050
4160 Hillsboro Hwy • Manchester, TN 37355
www.stamtec.com
Hydraulic Overload Protection System
For Mechanical Presses

2. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
OVERVIEW
• G1
• OCP
The hydraulic overload protection system comes standard on
our mechanical presses, including:
• G2
Hydraulic Overload Protection System
• GTX
• S2

3. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
PURPOSE
The system, which is built into the slide connection assemblies, relieves the
pressure of a high tonnage overload in milliseconds and quickly stops the slide
movement.
Normal operation is resumed by inching the slide to top dead center,
automatically reactivating the pump and re-pressurizing the system to the
original settings.
The overload cylinders also can be releases manually.
Hydraulic Overload Protection System

4. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
PUMP PLACEMENT
• OCP: back side of ram
• Some G2, GTX and S2: inside slide body
The placement of the hydraulic overload pump varies by
press series and year. Possible locations include:
• Older G1 and G2 Series: external tank mounted on
inside of frame
Hydraulic Overload Protection System

5. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
PUMP FEATURES
1. Air Piston
2. Limit Switch
3. Output Port(s)
Hydraulic Overload Protection System
4. Bleeder Screw

6. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
PUMP FEATURES
Hydraulic Overload Protection System
The appearance of your pump and your component locations
will vary depending on press, model and year.
On all models, the limit switch lets the PLC or press control
know the status of the pump.
The bleeder screw helps eliminate any air or loss of suction
that might occur.

7. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
BLEEDING THE SYSTEM
Hydraulic Overload Protection System
Take a metric Allen wrench, anywhere between 4 and 6
millimeters. Place the wrench in the bleeder screw and turn
counter clockwise.
Air and oil will seep out around
the set screw.
Once that’s done, tighten the
screw back up and let the pump
continue to pressurize.
The process might need to be repeated two or three times.

8. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
For more than 30 years, Stamtec has provided the U.S. market with the
highest quality stamping presses, offering the best in value and efficiency.
Our industry-leading product lines include:
• Mechanical Presses • Forging Presses
Hydraulic Overload Protection System
• Servo Presses
Our staff has the expertise and knowledge to help you identify the right
press for your application.
We also offer outstanding service and parts, a comprehensive
repair/rebuild program and a warranty unmatched in the industry.

9. STAMTEC, INC. • 931-393-5050 • 4160 Hillsboro Hwy • Manchester, TN 37355 • www.stamtec.com
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