JKS 2570 User Manual
Important
DESCRIPTION
QTY
A
Main Body
2 B Adjuster Ring
2 C Isolator Pad
2 D Bump Stop Adapter
2
E
10mm Locking Nut
2
F
Bump Stop Plug
2 G Polyurethane Bump Stop
2 H 10mm x 55mm Cap Bolt
2 I 5/16” x 3/4” Bolt
10 J 5/16” Nylock Nut
10 K 3/8” x 1-1/4” Cap Bolt
2
L
Coil Spring Retainer
2
M
7/16” x 1-1/2” Flathead Socket Screw
2 N 7/16” Flat Washer
2 O 7/16” Nylock Nut
2
Parts
MOST VEHICLES REQUIRE additional parts
or modifications to accommodate the
immediate increase in ride height provided by
Installation
the ACOS™ system.
REAR CONTROL ARMS MUST BE same
Instructions
Product: Adjustable Coil Spacer (ACOS™)
Part Number: PN 2570
Application: Jeep Wrangler JK, 2007+ (rear only)
length as original equipment arms to ensure
proper bump stop alignment and coil spring
clearance – see section 6 for details.
DO NOT EXCEED maximum range of
adjustment – see illustration on page 3.
Tools Required
Welcome
Hydraulic Floor Jack and Jack Stands
CONGRATULATIONS on your purchase
of a new JKS ACOS™ system! At JKS
Manufacturing, we are committed to providing
you with the best products available and your
satisfaction is our first priority.
PLEASE READ these Installation Instructions
carefully, and save them for future reference,
as they contain important installation and
maintenance information.
Before You Begin…
1. Familiarize yourself with the supplied parts
as illustrated in the column to the far right.
2. Thoroughly read all procedures to ensure
you have the tools and experience
necessary to complete this installation.
3. If you are not completely comfortable with
any of the procedures described on the
following pages, do not attempt this
installation. Contact the JKS Technical
Department at (308) 762-6949 to locate a
qualified installation specialist in your area.
JKS Adjustable Coil Spacer Installation PN 2570 Page 1 of 4
Metric/Standard Socket Wrench Set
Torque Wrench
Transfer Punch (or equivalent)
1/4” and 3/8” Drill Bits
1/4” Allen Wrench
Tape Measure
Spray Lubricant (WD-40 or similar)
Anti-Seize Lubricant
Medium Strength Threadlocker
Satin Black Spray Paint
Coil Spring Compressor *
Plasma Cutter *
Grinding Wheel *
Welding Equipment *
Factory Service Manual (recommended)
* Asterisk denotes tools that are not required for some
applications. Thoroughly read instructions first to
determine which tools will be required for your
application.
Installation
1. REMOVE REAR COIL SPRINGS
Remove the rear coil springs per the factory
service manual instructions for your vehicle.
HINT: A coil spring compressor is useful for
removal.
Depending on the application, it may be
necessary to completely or partially remove any
of the following components before spring can
be free from upper mount.
Shock Absorber
Swaybar
Track Bar
Emergency Brake Cable
Brake Line
ABS Wire
2. PREPARE UPPER SPRING MOUNT
Rotate the Main Body (A) until one of the holes
in the mounting flange aligns with the factory
hole in the upper spring mount.
Using the Main Body (A) as a template,
accurately mark the four remaining hole
locations on the upper spring mount.
HINT: A transfer punch or similar tool is useful
for marking hole locations.
Remove the Main Body (A) and drill a pilot hole
at each marked location using a 1/4” drill bit.
Enlarge each hole with a 3/8” drill bit.
Paint any exposed metal on the upper spring
mount to prevent corrosion.
Loosely thread a 5/16” Nylock Nut (J) onto each
5/16” x 3/4” Bolt (I).
Once all five bolts have been installed, tighten
the 5/16” Nylock Nuts (J) to 40 ft-lbs. using a
torque wrench.
Remove the rubber isolator pad from the upper
coil spring mount on the chassis.
Locate the small hole in the upper spring mount
that was previously concealed by the rubber
isolator pad.
Position the flange end (concave) of the Main
Body (A) over the center portion (convex) of the
upper spring mount as illustrated below.
3. INSTALL ACOS ON UPPER
SPRING MOUNT
Reposition the Main Body (A) of ACOS over the
center portion of the upper spring mount so that
all five mounting holes are in alignment.
Insert a 5/16” x 3/4” Bolt (I) through each
mounting hole. HINT: Bolts must be inserted
from above upper spring mount so that bolt
threads point down as illustrated below.
JKS Adjustable Coil Spacer Installation PN 2570 Page 2 of 4
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