JKS 2570 User Manual
Page 4
JKS Adjustable Coil Spacer Installation
PN 2570
Page 4 of 4
6. CHECK BUMP STOP ALIGNMENT
Before the rear coil springs are re-installed, it is
important to make sure the lower spring post will
properly align with the Bump Stop (G) during
suspension compression.
Carefully raise the axle housing with a hydraulic
jack until the Bump Stop (G) contacts the lower
spring post. HINT: A slight variation in
alignment is acceptable because the supplied
Coil Spring Retainer (L) will increase the Bump
Stop (G) landing surface.
IMPORTANT: If the Bump Stop (G) does not
contact the lower spring post, it may be
necessary to rotate the lower spring mount
on the axle housing. Typically this is only
required if longer-than-stock control arms
have been installed.
Rotating the lower spring mount requires
cutting and welding and should only be
performed by a qualified fabricator. Failure
to perform this modification correctly can
cause irreversible damage to the product
and vehicle.
For any questions regarding this procedure,
contact JKS Manufacturing immediately for
technical assistance.
JKS Technical Department
Phone
877-533-7557
7. 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 section of this installation.
ATTENTION INSTALLER
IMPORTANT NOTE REGARDING
SHOCK ABSORBERS
Make sure the shock absorbers accommodate
any changes in ride height. It may be necessary to
install new shocks that are the correct length for
your application.
8. INSERT COIL SPRING RETAINER
In addition to keeping the coil springs attached to
the lower spring mounts, the supplied Coil Spring
Retainers (L) also provide a larger surface for the
bump stops to contact
Locate the 5/8” hole in the center of the lower
spring mount on the rear axle.
Place Coil Spring Retainer (L) inside the spring
by sliding it between the coils. Make sure flat
side of Coil Spring Retainer faces down.
Position Coil Spring Retainer (L) directly on the
lower spring mount as illustrated.
9. SECURE SPRING RETAINER TO
LOWER SPRING MOUNT
Insert 7/16” x 1-1/2” Flathead Socket Screw (M)
into tapered hole in center of Coil Spring
Retainer (L), and through the hole in the lower
spring mount.
From beneath spring mount, slide a 7/16” Flat
Washer (N) onto threads of Flathead Socket
Screw (M
) and install the 7/16” Nylock Nut (O).
Secure the Coil Spring Retainer (L) to the lower
spring mount by tightening the mounting
hardware. Use a 1/4” Allen Wrench to prevent
the 7/16” x 1-1/2” Flathead Socket Screw (M)
from spinning, and tighten the 7/16” Nylock Nut
(O) to 50 ft-lbs.
Make sure the Coil Spring Retainer (L) is
perfectly flat against the lower spring mount,
and coil spring is secure.
Operation
Ride Height Adjustments
Future ride height adjustments should be made
with NO LOAD on the front coil springs, and the
suspension at FULL DROOP.
NEVER TURN Adjuster Ring (B) while under tension
and ALWAYS APPLY SPRAY LUBRICANT to threads
of Main Body (A) before adjusting.
Maintenance
Regular cleaning with pressurized water is
recommended to maximize ease of operation and
reliability.
In addition, the Bump Stop Adapter (D) h
as two 1/8”
drainage holes that evacuate any water collected inside
the upper spring retainer. Periodically check for
blockages and clear the drainage holes if necessary.
2009 JKS Manufacturing, Inc & Aftermarketing, LLC
Revision Date 3/6/2013