User Manual
Table Of Contents
- Technical Support
- Preface
- Introduction
- Overview Reference
- Series 647 Hydraulic Wedge Grips Component Identification
- Series 647 Hydraulic Wedge Grips Functional Description
- About Gripping Specimens
- About Wedges
- About Spiral Washers
- About Couplings
- About All Temperature Grips
- About Environmental Chambers
- Hydraulic Fluid Recommendations
- Cooling Water Specifications
- Series 647 Wedge Grip Temperature Ranges
- Series 647 Hydraulic Wedge Grip Force and Torque Capacities
- Safety
- General Safety Practices: Grips and Fixtures
- Read all manuals
- Avoid Pinch and Crush Points
- Locate and read hazard placards/labels
- Know facility safe procedures
- Know controls
- Know Specimen Properties
- Have first aid available
- Be aware of component movement with hydraulics off
- Keep bystanders safely away
- Wear proper clothing
- Remove flammable fluids
- Check bolt ratings and torques
- Lift Equipment Safely
- Practice good housekeeping
- Do not exceed the Maximum Supply Pressure
- Do not disable safety devices
- Provide adequate lighting
- Provide means to access out-of-reach components
- Wear appropriate personal protection
- Handle chemicals safely
- Know system interlocks
- Know system limits
- Do not disturb sensors
- Ensure secure cables
- Stay alert
- Contain small leaks
- Stay clear of moving equipment/avoid crush points
- Know the causes of unexpected actuator motions
- General Precautions for Environmental Components
- Hazard Placard Placement
- General Safety Practices: Grips and Fixtures
- Installation
- Operation
- Maintenance
f) Turn the hydraulic pressure off.
Ensure that system hydraulic pressure has been reduced to zero before proceeding. To do this, turn
off the hydraulic power unit and exercise the actuator until it stops moving.
3.
Warning:
The upper grips are very top heavy and will have a tendency to tip over when lifted by the
double swivel eyebolts.
Dropped grips can cause injury to personnel and damage to equipment.
Never attempt to control the grip by holding onto the eyebolts. Use the connector stud to help
control the grip balance.
Mount the upper grip to the force transducer on the crosshead using the appropriate stud, shims, spacer,
or spiral washers. SeeAxial-Torsional Grip Installation Components on page 45.
Note:
Ensure that the force transducer is properly aligned (see your load unit manual).
a) Thread the stud into the upper grip.
b) Place a wooden spacer (a wood block or piece of plywood) on top of the lower grip. The wooden spacer
should be large enough to cover the diameter of the grip.
Note:
You will need to construct a proper support or have someone available to help balance the upper
grip on the lower grip.
c) Carefully position the grip on top of the wooden spacer on the lower grip.
You might need to insert the double swivel eyebolts into the threaded holes on the grip chamber. Attach
a lifting device to the double swivel eyebolts and position the grip on top of the lower grip.
d) With the connector stud facing up, add any required shims, spacers, or spiral washers to the stud.
e) Turn on hydraulic pressure and slowly raise the lower grip until the stud on the upper grip just makes
contact with the force transducer. Reposition the grip, as necessary, for proper thread alignment.
f) Slowly screw the grip into the force transducer until it is snug.
4. Align the grip wedge openings. See “Align the Wedge Openings” for more information.
Align the lower grip as necessary for the desired hose connection and wedge opening orientation. If the
actuator rod cannot be rotated, remove the lower grip and install one or more shim washers between the
spiral washers and the lower element of the force train. Reinstall the grip (go to Step 2).
Align the upper grip wedge opening with the lower grip wedge opening. If proper alignment is not possible,
remove the upper grip and install one or more shim washers between the spiral washers and the upper
element of the force train. Reinstall the grip (go to Step 3).
5. Connect the hydraulics.
54 Series 647 Hydraulic Wedge Grips Reference Manual
Installation