
INSTALLATION INSTRUCTIONS
PAC-125 with mount (not included) installed.
Lateral Shift Accessory
Model: PAC-125/PAC-126
The PAC-125 Lateral Shift Accessory is for use with Chie f Model PSM, PST, PRO, PLP, Large Flat Panel Display wall
mounts. It can be installed on either a 16" or 24" on-center stud systems, and includes seven mounting holes at 4"
intervals. The PAC-125 is also grooved for drilling at other intervals.
BEFORE YOU BEGIN
The instructions provided in this document outline the installation of the PAC-125 Lateral Shift Accessory to specific
Chief mounts. If you have questions regarding the use or installation of this accessory, contact a Chief Customer
Service representative at 1-800-582-6480 before proceeding with the installation.
To prevent damage to the Kit, which could affect or void the Factory warranty, and to the equipment that will be
attached to it, thoroughly study all instructions and illustrations before you begin the installation.
CHIEF MANUFACTURING INC.
1-800-582-6480 952-894-6280 FAX 952-894-6918
8401 EAGLE CREEK PARKWAY, STE 700
SAVAGE, MINNESOTA 55378 USA
8800-000059 Rev B
©2006 Chief Manufacturing
www.chiefmfg.com
01/06

Model: PAC-125/PAC-126 Installation Instructions
IMPORTANT WARNINGS AND CAUTIONS!
WARNING: A WARNING alerts you to the possibility of serious injury or death if you do not follow the instructions.
CAUTION: A CAUTION alerts you to the possibility of damage or destruction of equipment if you do not follow the
corresponding instructions.
IMPROPER INSTALLATION CAN LEAD TO THE MOUNT FALLING. The structure to which the mount is installed
must be capable of supporting 4 times the combined weight of this accessory, the mount and the display. If the
structural members can not support this weight, reinforce the structural members before installing the mount.
IMPROPER INSTALLATION CAN LEAD TO THE MOUNT FALLING. The load placed on the PAC-150 must not
exceed 150 lbs (68.03kg) the maximum weight of the PAC-125 accessory.
Changes or modifications not approved by Chief Manufacturing could void user’s warranty.
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Figure 1: Dimensions

Installation Instructions Model: PAC-125/PAC-126
Table 1: Parts
ITEM DESCRIPTION QTY*
10 BRACKET, Lateral Shift
PAC-125 28.00" long/PAC-126 36.00" long
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20 NUT, T-Slot, 5/16-18 4
30 STUD, Threaded, 5/16-18 4
40 WASHER, Lock, 5/16" 4
50 NUT, Hex, 5/16-18 4
60 SCREW, Panhead, Self Tapping, #8 x 1/4" 4
70 WASHER, Flat, 1/4" 4
TOOLS REQUIRED FOR INSTALLATION
• Drill and Drill bits
• Phillips Screw Driver
INSPECT MOUNT BEFORE ASSEMBLY
Carefully inspect components for shipping damage. If
damage is apparent, call your carrier claims agent and
do not continue with installation until the carrier has
reviewed the damage. (see Figure 2)
Figure 2: Parts
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Model: PAC-125/PAC-126 Installation Instructions
This dimension
required from mount
being installed
Pilot Holes
(4 places)
Wood Studs
(16" or 24" on center)
Identified during
step 1 plus 2 1/8"
Dimension
ASSEMBLY AND INSTALLATION
Lateral Shift Bracket Assembly
1. Assemble four threaded studs (30) to four T-Slot nuts
(20).
2. Slide T-Slot nut assembly into bracket (10) channel.
3. Install four self tapping screws (60) into bracket (10)
ends. (see Figure 3)
Figure 4: Identify distance between Vertical
Mounting Holes on mount
4. Locate and mark four pilot hole locations.
5. Drill four pilot holes using drill size specified in
Installation Instructions provided with mount being
installed.
Figure 3: Install T-Slot Nuts on Lateral Shift Bracket
Installation
IMPROPER INSTALLATION CAN LEAD TO THE
MOUNT FALLING. The structure to which the PAC-125
is installed must be capable of supporting 4 times the
combined weight of the accessory, the mount and the
display.
1. Identify desired mounting location considering:
• Structural integrity of desired location.
• Length of PAC-125 mounting brackets
• Size of display being mounted
2. Determine distance between vertical mounti ng holes
on the mount being installed by referring to the
Installation Instructions provided with the mount.
(see Figure 4)
3. Add 2 1/8" to the dimension identified during step 1.
2 1/8" must be added to the dimension identified during
step 1 for proper locating of pilot holes.
Figure 5: Mark and Drill Pilot Holes
6. Position upper bracket against wall with mounting
slots up and align with pilot holes. (see Figure 6)
7. Secure upper bracket to wall using hardware
specified in installation instructions provided with
mount being installed.
8. Position lower bracket against wall with mounting
slots up and align with pilot holes. (see Figure 6)
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9. Secure lower bracket to wall using hardware specified
in installation instructions provided with mount being
installed.

Installation Instructions Model: PAC-125/PAC-126
Pilot Holes
(4 places)
Upper Bracket
(mounting slots up)
Lower Bracket
(mounting slots down)
Mounting Stud
Align with mounting
holes in mount
(4 places)
Upper Bracket
Lower Bracket
Mount being installed
70
40
50
12. Place mount onto mounting studs on lateral shift
brackets and secure using four Flat washer s (70), four
lock washers (40), and four hex nuts (50).
(see Figure 8)
Figure 6: Mount Lateral Shift Brackets on Wall
10. Identify mounting holes in mount being insta lled using
the installation instructions provided with the mount.
11. Position mounting studs in upper and lower lateral
shift brackets so that they ali gn with mounting holes in
mount being installed.
Figure 8: Install Mount to Lateral Shift Brackets
Figure 7: Position Mounting Tabs
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Model: PAC-125/PAC-126 Installation Instructions
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Installation Instructions Model: PAC-125/PAC-126
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Model: PAC-125/PAC-126 Installation Instructions
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