JKS 2700 - Manual (Page 5)

JKS AC OS Pro™ Installation PN 2700 Page 5 of 8
Rear Installation
Important
MOST VEHICLES REQUIRE additional parts
or modifications to accommodate the
immediate increase in ride height provided by
the ACOS Pro™ system.
COMPATIBLE WITH 4” REAR COIL
SPRINGS or taller. This product can not be
installed with springs shorter than 4”.
DO NOT EXCEED maximum range of
adjustment
– see illustration on page 7.
INSTALLATION of this product is not
reversible and should only be performed by an
experienced mechanic or fabricator.
Tools Required
 Plasma Cutter
 Hydraulic Floor Jack and Jack Stands
 Metric/Standard Socket Wrench Set
 Torque Wrench
 1/4" & 5/16” Allen Wrenches
 Machinist Calipers (or equivalent)
 Tape Measure
 Band Saw (or equivalent) *
 16TPI Thread Restoring File (or equivalent) *
 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 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
 Brake Line
 Track Bar

2. PREPARE UPPER SPRING MOUNT
The factory upper spring mount and bracket must be
modified in order to install the ACOS Pro
 . This
modification is not reversible and should only be
performed by an experienced mechanic or fabricator.
 Remove the rubber bump stop and bump stop
holder from the upper spring mount.
 Remove the factory rubber isolator pad from the
upper coil 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
 .
 Turn the Main Body (B) upside down and
position the threaded end over the protruding
portion of the upper spring mount.
 Mark a straight and level line around the
protruding portion of the upper spring mount
where the diameter is exactly 2-
1/4”.
HINT: Machinist calipers are useful for
measuring diameter.