JKS 2550 - Manual (Page 3)

JKS Adjustable Coil Spacer Installation PN 2550 Page 3 of 3
‰ 4. INSTALL ACOS ON UPPER
SPRING MOUNT (cont.)
 Remove the10mm x 110mm Cap Bolt (G),
Bump Stop (F), and Bump Stop Support (E)
from upper spring mount and re-install Adjuster
Ring (B) and Isolator Pad (D) onto the
Threaded Tube (C).
 Apply anti-seize lubricant to the 10mm x
110mm Cap Bolt (G) and insert through Bump
Stop (F) and Bump Stop Support (E). Thread
bolt completely into hole in the center of upper
spring mount, but do NOT tighten.
HINT: Raised surface of Bump Stop Support (E)
must face up and fully engage the recessed
bottom of Threaded Tube (C).
 Slowly tighten 10mm x 110mm Cap Bolt (G)
into the coil spring mount until sides of Bump
Stop (F) begin to bulge. Do NOT overtighten!
‰ 5. SET ADJUSTER RING FOR
DESIRED RIDE HEIGHT
Once the Adjustable Coil Spacer is installed, rear ride
height is determined by measuring the distance between
top of Transfer Ring (A) and bottom of Isolator Pad (D),
and subtracting 1/4” (0.25 in.).
X” – 1/4” = RIDE HEIGHT *
* Represents increase in ride height over OE suspension
WARNING
DO NOT EXCEED
MAXIMUM RANGE OF ADJUSTMENT
ADJUSTMENT RANGE *
MINIMUM: 2” (2.0 in.)
MAXIMUM: 3-3/8” (3.375 in.)
 Apply spray lubricant to Threaded Tube (C) and
rotate Adjuster Ring (B) to desired position.
 Tighten recessed bolt in Adjuster Ring (B) to
lock in position.
‰ 6. RE-INSTALL REAR COIL SPRINGS
 Re-install the rear coil springs per the factory
service manual instructions for your vehicle.
HINT: A coil spring compressor is useful for
installation.
 Also re-install any of the components that were
removed during the REMOVE REAR COIL
SPRINGS step of this installation.
ATTENTION INSTALLER
IMPORTANT NOTE REGARDING
SHOCK ABSORBERS
Most vehicles will require additional parts or
modifications to accommodate the increase in
ride height provided by the ACOS system.
To prevent the coil springs from becoming
unseated during maximum suspension extension,
correct length shock absorbers must be installed.
Operation
Future ride height adjustments should be made
with NO LOAD on the rear coil springs, and the
suspension at FULL DROOP.
NEVER turn Adjuster Ring (B) while under tension,
and ALWAYS apply spray lubricant to Threaded
Tube (C) before adjusting.
Maintenance
Regular cleaning with pressurized water is
recommended to maximize ease of operation and
reliability.
© 2009 JKS Manufacturing, Inc & Aftermarketing, LLC
Revision Date 7/24/2009