Maintenance – JKS 7100 User Manual
Page 2
JKS7100
JKS Adjustable Control Arm Installation
2 Page
Remove the nut and bolt from the chassis rail
bracket. Retain the original mounting hardware.
Remove original front upper suspension arm.
Inspect the condition of the rubber suspension
bushing that is pressed into the axle housing
bracket and replace if cracked or worn.
NEW OE RUBBER BUSHINGS for the upper
suspension arm brackets on front axle housing are
available from JKS as PN 52038025.
HINT: Special factory tools PN 7932/7603/7604
(Miller Special Tools, 800-801-5420) are useful for
removing and installing OE rubber bushings.
2. SET CONTROL ARM LENGTH
Adjustable Control Arms are fully collapsed when supplied
from JKS and must be adjusted to the desired lengths
before installation.
The working length of each upper Control Arm can be
increased (up to 3.75” longer), decreased (up to 0.25”
shorter), or exactly the same as the OE suspension arm.
Determine ideal Control Arm length for your ap-
plication by considering factors such as:
Â
Length of OE suspension arm
Â
Tire Clearance
Â
Pinion Angle / Caster
Rotate adjustable end of Control Arm until the
desired length is achieved.
Adjust corresponding Control Arm to exact same
length.
3. INSTALL CONTROL ARM
Apply anti-seize lubricant to bolt threads of original
mounting hardware.
Mount the non-rotating (BLACK) end of Adjustable
Control Arm to the chassis rail bracket with the
greaseable fitting facing UP.
Install the original mounting bolt and finger tighten
the nut. DO NOT torque mounting hardware until
instructed.
Mount the rotating (GOLD) end of Adjustable Con-
trol Arm to the axle housing bracket.
Install the original mounting bolt and finger tighten
the nut. DO NOT torque mounting hardware until
instructed.
HINT: If mounting bolt is difficult to
install due to misalignment of Control Arm bush-
ing with mounting bracket, either (1) adjust height
of axle housing with hydraulic jack, (2) move axle
housing into position with a heavy-duty ratchet
strap, or (3) temporarily disconnect track bar until
mounting holes align.
4. TIGHTEN MOUNTING HARDWARE
Once all Adjustable Control Arms have been
properly installed, lower the vehicle to the ground
until coil springs are supporting the full weight of
vehicle.
Using a torque wrench, tighten the mounting hard-
ware to the factory torque specifications for your
vehicle.
Wrangler TJ, 1997+
Â
Tighten nut at FRONT axle and chassis brackets
to 60 ft-lbs.
Grand Cherokee ZJ, 1993-98
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
Grand Cherokee WJ, 1999-04
Tighten nut at FRONT axle and chassis brackets
to 60 ft-lbs.
Cherokee XJ, 1984-01
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
Comanche MJ, 1986-92
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
5. POST-INSTALLATION INSTRUCTIONS
Adjustable Control Arms are supplied pre-lubri-
cated, although it will be necessary to add more
grease after they have been adjusted and installed
on the vehicle. Refer to Maintenance section for
specific lubrication instructions.
Have vehicle professionally aligned before driving
on highway.
Maintenance
Control Arms should be greased regularly as part of
vehicle maintenance schedule. Lubricate using moisture
resistant marine style grease and a hand-pump grease
gun. DO NOT use a pneumatic grease gun. Add grease
slowly until resistance is felt. The internal spring-loaded
seal can be damaged by forcing too much grease into
Control Arms.
©2013 JKS Manufacturing, Inc & Aftermarketing, LLC
Revision Date 10/11/2013