Hubbell CHANCE PISA User manual
P303-1466
Rev. B
INSTRUCTIONS
FOR
© Copyright 1996 & 2013 Hubbell Incorporated
CHANCE PISA®LOCKING DOG ASSEMBLY
NOTE: Hubbell has a policy of continuous product improvement. We reserve the right to change design and specications without notice.
GENERAL
These instructions do not claim to cover all details or variations in equipment, nor to provide for all possible conditions to be
met with concerning installation, operation, or maintenance of this equipment. If further information is desired or if particular
problems are encountered which are not sufciently covered in this guide, contact Hubbell Power Systems.
▲
! WARNING
Anchor installation can puncture underground utility service.
Can cause property damage, serious injury, or death.
Locate and avoid all underground-utility services before
installing an anchor.
Bolt the Locking Dog Assembly to the Kelly Bar Adapter
(a Torque Indicator may be inserted between them) using
the bolts, lockwashers, and nuts provided (both must have
the same size bolt circles or a Bolt Circle Adapter must be
used). The bolts provided with each Locking Dog Assembly
are hot dip galvanized, and are the appropriate length for
attachment to another ange of equal thickness with clear-
ance holes (not tapped holes).
Tighten the bolts to the recommended torque values shown
in the table on the right.
Note: Galvanized bolts cannot be used to attach the
adapter to another tool having tapped holes (such as the
Chance Torque Indicator). When using a Torque Indicator
use the plated bolts provided with the Torque Indicator to
attach the Kelly Bar Adapter and Locking Dog Assembly
and tighten to the recommended torque values shown in
the table on the right.
Read, Follow, and Understand this instruction sheet completely
before installing an anchor. These instructions are intended to
illustrate the use of Locking Dog Assembly. Anchor installing
tools covered in this instruction sheet must be used by com-
petent personnel familiar with and following good work and
safety practices. Should additional information and details be
desired, or if specic situations arise which are not covered
adequately herein, the user should refer to Chance directly.
In some cases, Chance may make specic recommendations
concerning installation torque and installation depth for a
particular application.
▲
! WARNING
If necessary to replace any bolts, always replace with the
same diameter, length, and grade as the originals.
Torque
Rating of
the Anchor
tools (ft-lb)
Bolt Circle
Diameter
Bolt
Dia.
Grade Recom-
mended
tightening
dry torque
values (ft-
lb) on bolts
10,000 5-1/4" 1/2 5 75
15,000 7-5/8" 5/8 2 95
KELLY BAR
COIL LOCK
BENT ARM PIN
LOCKING DOG
ASSEMBLY
P303-1466
Rev. B
USE OF LOCKING DOGS
The Locking Dog Assembly has three ring positions. The inside ring position allows the Locking Dogs to hold both the
Drive-End Wrench and the Pisa Rod. The middle position releases the Pisa Rod, but holds the Drive-End Wrench.
▲
! WARNING
Inadequate maintenance or improper use of tools and
hardware may lead to unexpected failure.
Can cause property damage, injury, or death.
Frequently inspect tools and hardware for damage, cor-
rect quantity, correct type, and proper torque. Replace as
necessary with the same grade and size as the originals.
▲
! WARNING
Loose or broken parts may be thrown at high speed.
Can cause property damage, injury, or death.
Stay away from drive train during installation.
2
Inside ring position Middle ring position
LOCKING DOG
ASSEMBLY
WRENCH
LOCKING DOG
ASSEMBLY
PISA ROD
DRIVE-END
WRENCH
P303-1466
Rev. B
▲
! WARNING
Heavy suspended objects.
Can fall and cause property damage, injury, or death.
Do not stand under the locking dog assembly when ad-
justing the dog positions.
▲
! WARNING
Bending or over-torquing the tool string is hazardous.
Can cause property damage, injury, or death.
Do not allow visible bending or torque greater than the
rating of your tool.
Always use tools that are the appropriate size and rating for
your particular application. For instructions on how to use
the Kelly Bar Adapter, Drive-End Wrench, or other anchor
tools, see the instruction sheets included with each tool.
3
The outside position releases the Pisa Rod and Drive-End
Wrench.
The Locking Dog Assembly is now ready to accept a Drive-
End Wrench.
Outside ring position
LOCKING DOG
ASSEMBLY
P303-1466
Rev. B
INSTRUCTIONS FOR SECURING THE LOCKING DOGS
If set screws become loose, remove and replace by clean-
ing the set screw threads with Loctite®thread cleaner.
Coat the thread of the 1/2" x 5/8" set screw with Loctite RC
680.
Insert the Locking Dog Housing into the Locking Dog
Assembly. Align the “v” on the Locking Dog Housing with
the “v” on the Locking Dog Assembly. While the “v”s are
aligned, slide the Locking Dog Housing in and out of the
Locking Dog Assembly until the indentation in the Locking
Dog Housing is under the set screw holes in the Locking
Dog Assembly.
Insert the 1/2" x 5/8" set screw. The set screw must be
seated in the indentation of the Locking Dog Housing in
order to hold it securely in the Locking Dog Assembly.
▲
! WARNING
Falling objects.
Can cause property damage, injury, or death.
Locking Dog Housing must be installed with the angled
face of dog pointing toward socket opening of Locking
Dog Assembly to prevent anchor or wrench from falling.
▲
! WARNING
Loose parts may be thrown at high speed.
Can cause property damage, injury, or death.
The Locking Dog Housing must be properly aligned in the
Locking Dog Assembly. The set screws must be inserted
and Loctited into position to ensure that the Locking Dog
does not eject during operation.
Tighten the set screw to 15 to 20 ft-lb. torque.
Coat the threads of 1/2" x 3/8" set screw with Loctite RC
680.
Insert the set screw and tighten to 15 to 20 ft-lb. torque.
IMPORTANT: Proper installation of set screws will result
in the head of the 1/2" x 3/8" set screw being recessed about
1/16" to 1/8" below boss on the Locking Dog Assembly. If set
screws are installed improperly, the 1/2" x 3/8" set screw will
extend out of hole about 1/8" above boss on the Locking Dog
Assembly.
If this occurs, the 1/2" x 5/8" set screw must be removed and
properly aligned with the counter-sink in the dog housing.
Note: Installation of the set screws should be completed
within fteen minutes of application of Loctite. Follow the
instructions on the Loctite package.
Repeat the same process for other Locking Dog Housing.
Replacement kits and warning labels are available form A.
B. Chance Co. Replace the warning labels if they are dam-
aged or removed. Three warning labels are included in the
replacement kit. Wire brush casting housing until it is clean
and completely remove old labels. Replace new labels onto
the outside of the casting so they are readable by the user.
Loctite is a registered trademark of the Loctite Corp.
LOCKING DOG
ASSEMBLY
LOCKING DOG
HOUSING
1/2" x 5/8"
set screw
1/2" x 3/8"
set screw
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