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
2. Using the utility packing hook, disconnect both springs from the spring posts on the corresponding wedge.
It is not necessary to remove the springs from the spring anchors.
3. Inspect the springs and replace them, if necessary.
4. Remove the wedge by sliding it towards the center of the grip and then lifting it out of the grip.
5. Repeat Steps 2 and 3 for the remaining wedges.
6. Apply a thin coat of lubricant to the edges of the wedge which contact the chamber and piston; see
“Temperature ranges” for information about the temperature ranges and restrictions.
7. Place the wedge into the center of the grip and then slide it towards the chamber.
8. Using the utility packing hook, connect the springs from the spring anchor on the grip piston to the spring
post on the corresponding wedge.
9. Repeat Steps 6 and 7 for the remaining wedges.
Change Wide Wedges
Perform the following procedure to replace a narrow wedge set with a wide wedge set, or a wide wedge set
with another wide wedge set. Each wedge is labeled with the wedge part number and manufacturing date
code. Ensure that replacement wedges are a matched set (four wedges) before attempting to install the
wedges into the grip.
DescriptionItemDescriptionItem
Spring Anchor5Chamber1
Wire Cables6Wedges2
Cap Screw7Spring3
Wedge8Piston4
1. Remove any specimen installed in the grips. Leave both grip controls in the release position. Position the
actuator or crosshead as necessary for convenient access to the grip wedges. Remove system hydraulic
pressure and grip supply pressure.
84 Series 647 Hydraulic Wedge Grips Reference Manual
Operation