JKS 2700 User Manual
DESCRIPTION
QTY
A
Reinforcement Ring
2
B
Main Body
2
C
5/16” x 1-1/4” Cap Bolt
12
D
5/16” Nylock Nut
12 E Adjuster Ring
2 F 3/8” x 1-1/4” Cap Bolt
2 G Isolator Pad
2
H
Bump Shock Adapter
2
I
Bump Shock Nut
2
J
Bump Shock Assembly
2
Installation
Instructions
Welcome
CONGRATULATIONS on your purchase
of a new JKS ACOS Pro™ 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,
operation and maintenance information.
Before You Begin…
1. Familiarize yourself with the supplied parts
as illustrated in the following column.
2. Thoroughly read all procedures for your
application to ensure you have the tools
and experience necessary to complete this
installation.
Front Installation ► Pages 2-4
Rear Installation ► Pages 5-8
Parts
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
Product: ACOS Pro™
Part Number: PN 2700
Applications:
Jeep Wrangler TJ, 1997-06 (front or rear)
Jeep Grand Cherokee ZJ, 1993-98 (front only)
Jeep Cherokee XJ, 1984-01 (front only)
Jeep Comanche MJ, 1986-92 (front only)
JKS ACOS Pro™ Installation PN 2700 Page 1 of 8
qualified installation specialist in your area.
Front Installation
Important
MOST VEHICLES REQUIRE additional parts
or modifications to accommodate the
immediate increase in ride height provided by
the ACOS Pro™ system.
DO NOT EXCEED maximum range of
adjustment – see illustration on page 3.
INSTALLATION of this product is not
reversible and should only be performed by an
experienced mechanic or fabricator.
Tools Required
Hydraulic Floor Jack and Jack Stands
Metric/Standard Socket Wrench Set
Torque Wrench
1/4” & 5/16” Allen Wrenches
Die Grinder with Cut-Off Wheel
(or reciprocating saw)
Grinding Wheel *
Tape Measure
1/4” and 3/8” Drill Bits
Transfer Punch (or equivalent)
Spray Lubricant (WD-40 or similar)
Anti-Seize Lubricant
Medium Strength Threadlocker
Coil Spring Compressor *
Satin Black Spray Paint
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 FRONT COIL SPRINGS
Remove the front 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
Brake Line
ABS Wire
Lower Suspension Arm
Track Bar
Steering Drag Link
Lower Spring Retainer Clip
2. PREPARE UPPER SPRING MOUNT
Remove the rubber bump stop, bump stop
holder and OE spacer (if equipped) from the
upper spring retainer.
HINT: On most vehicles the bump stop holder is
secured to the upper spring retainer with a single
bolt. However, on some Cherokee XJ and
Comanche MJ models the bump stop holder is
welded to the spring retainer. In this case, you will
need to cut or grind away the flared portion of the
bump stop holder before proceeding to Step 2.
Remove the factory rubber isolator pad from the
upper coil spring retainer.
3. DRILL UPPER SPRING MOUNT
Remove the Bump Shock Assembly (J), Bump
Shock Nut (I), Bump Shock Adapter (H),
Isolator Pad (G) and Adjuster Ring (E) from the
Main Body (B) of the ACOS Pro.
Slide the Main Body (B) over the spring retainer
until the flange rests flush against the upper
spring mount. Hint: The Main Body must be
perfectly centered over the spring retainer.
Using the flange of the Main Body (B) as a
template, accurately mark all six hole locations
on the upper spring mount using a transfer
punch or equivalent. Remove Main Body from
spring mount.
Using a 1/4” bit, drill a pilot hole at each hole
location. Enlarge each hole with a 3/8” drill bit.
JKS ACOS Pro™ Installation PN 2700 Page 2 of 8
Paint any exposed metal on the upper spring
mount to prevent corrosion.
4. CUT UPPER SPRING RETAINER
WARNING
DO NOT EXCEED
MAXIMUM RANGE OF ADJUSTMENT
ADJUSTMENT RANGE
MINIMUM: 1-3/8” (1.375 in.)
MAXIMUM: 3-1/4” (3.250 in.)
The majority of the factory spring retainer must be
permanently removed from the upper spring mount in
order to install the ACOS Pro. This modification is not
reversible and should only be performed by an
experienced mechanic or fabricator.
Mark a location on the upper spring retainer that
is 1” away from the upper spring mount.
Cut away the upper spring retainer as indicated
in the picture below. HINT: A die grinder with
cut-off wheel or reciprocating saw is useful for
cutting upper spring retainer.
5. INSTALL MAIN BODY OF ACOS
PRO ON UPPER SPRING MOUNT
Place the Reinforcement Ring (A) above the
upper spring mount and align the mounting
holes. Hint: On Cherokee XJ and Comanche
MJ models it will be necessary to first remove a
factory mounting stud for the air intake box that
interferes with the Reinforcement Ring. A die
grinder with cut-off wheel is useful for removing
the mounting stud.
Position the Main Body (B) against the bottom
of the upper spring mount and align the
mounting holes.
Insert a 5/16” x 1-1/4” Cap Bolt (C) through
each hole. Loosely secure with a 5/16” Nylock
Nut (D) from above the spring mount.
HINT: When installed correctly, the
Reinforcement Ring (A) and Main Body (B) will
sandwich the upper spring mount.
Once all six bolts have been installed, tighten
the 5/16” Nylock Nuts (D) to 40 ft-lbs. using a
torque wrench.
6. SET ADJUSTER RING FOR
DESIRED RIDE HEIGHT
Apply spray lubricant to threads of Main Body
(B). Install Adjuster Ring (E) by threading
clockwise onto Main Body (B).
Slide Isolator Pad (G) onto Main Body until flush
with Adjuster Ring (E).
IMPORTANT: Vehicle ride height is determined
by measuring the distance between the
top of Main Body and bottom of Isolator Pad,
and then subtracting 3/4” (0.75 in.).
X” – 3/4” = RIDE HEIGHT *
* Represents increase in ride height over OE suspension
JKS ACOS Pro™ Installation PN 2700 Page 3 of 8
Rotate Adjuster Ring (E) to desired position and
tighten the recessed 3/8” x 1-1/4” Cap Bolt (F)
to lock in place.
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