JKS 1100 User Manual
INSTALLATION
INSTRUCTIONS
517-278-1226 • tech@jksmfg.com • www.jksmfg.com
491 W. Gareld Avenue, Coldwater, MI 49036
Product: Adjustable Bump Stops™
Part Number: JKS1100
Applications: Wrangler JK, 2007+ (front only)
Wrangler TJ, 1997-06 (front or rear)
Grand Cherokee ZJ, 1993-98 (front only)
Cherokee XJ, 1984-01 (front only)
Comanche MJ, 1986-92 (front only)
Welcome
CONGRATULATIONS on purchasing a set of new Adjustable BumpStops™ from JKS Manufacturing. We are committed to providing you with the best products available and
your satisfaction is our rst priority.
PLEASE READ these Installation Instructions carefully,
and save them for future reference, as they contain important installation and maintenance information.
Important
MAY BE INSTALLED IN SIX (6) POSSIBLE CONFIGURATIONS depending on individual spacer(s) used. Use
appropriate hardware for your conguration. Refer to
page 2 for details.
Tools Required
Metric/Standard Socket Wrench Set
Torque Wrench
Adjustable Oil Filter Wrench * (for tightening 2.00”
BumpStop Spacer)
Tape Measure
27/64” Drill Bit
1/2” NC x 13 TPI Tap
Anti-Seize Lubricant
Coil Spring Compressor *
Hydraulic Floor Jack & Jack Stands
Factory Service Manual (recommended)
* Asterisk denotes tools that are not required for some applica-
tions. Thoroughly read instructions rst to determine which tools
will be required for your application.
Parts
Description QTY
A
2.00” BumpStop Spacer 2
B
1.25” BumpStop Spacer 2
C
0.75” BumpStop Spacer 2
D
1/2” x 2” Stud 2
E
1/2” x 2-1/2” Bolt 2
F
1/2” x 1-1/2” Bolt 2
G
1/2” x 1-1/4” Bolt 2
H
Split Washer 2
JKS 110 0JKS Adjustable Bump Stop Installation
Page 1
3.25" Bump Stop Conguration Pictured
Installation
1. REMOVE COIL SPRINGS
Raise and support the vehicle chassis with jack
stands.
 FRONT INSTALLATION – Position behind
front lower suspension arm brackets.
 REAR INSTALLATION – Position in front of
rear lower suspension arm brackets
Remove the 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 neces-
sary to completely or partially remove any of the
following components before spring can be free
from upper mount. H INT: Refer to factory ser-
vice manual for procedures not covered in these
instructions.
 Shock Absorber
 Swaybar
 Brake Line
 ABS Wire
 Lower Suspension Arm
 Track Bar
 Steering Drag Link
 Spring Retainer Clip
2. PREPARE LOWER SPRING MOUNT
Locate the dimple in the center of the lower spring
mount on the axle housing.
Using the dimple as a guide, drill a 27/64” hole
through the center of the lower spring mount.
Tap the hole with a 1/2” NC x 13 TPI tap.
3. DETERMINE BUMPSTOP LENGTH
JKS Adjustable BumpStops can be installed in six (6)
possible congurations (0.75”, 1.25”, 2.00”, 2.75”, 3.25”, or
4.00”), depending on the individual spacer(s) used.
Determine the ideal BumpStop length for your ap-
plication by considering factors such as:
Clearance between vehicle tires and body panels
during full suspension compression
Clearance between axle housing and chassis or
drivetrain during full suspension compression
Length of existing bump stop extension, if installed
Choose the spacer(s) that provides maximum,
unobstructed suspension compression for your
application from the list below.
0.75” BumpStop Conguration
SPACER: 0.75” only
HARDWARE: 1/2” x 1-1/4” Bolt + Split Washer
1.25” BumpStop Conguration
SPACER: 1.25” only
HARDWARE: 1/2” x 1-1/2” Bolt + Split Washer
2.00” BumpStop Conguration
SPACER: 2.00” only
HARDWARE: 1/2” x 2” Stud only
2.75” BumpStop Conguration
SPACERS: 2.00” + 0.75”
HARDWARE:
1/2” x 2” Stud + 1/2” x 1-1/4” Bolt + Split Washer
3.25” BumpStop Conguration
SPACERS: 2.00” + 1.25”
HARDWARE:
1/2” x 2” Stud + 1/2” x 1-1/2” Bolt + Split Washer
4.00” BumpStop Conguration
SPACERS: 2.00” + 1.25” + 0.75”
HARDWARE:
1/2” x 2” Stud + 1/2” x 2-1/2” Bolt + Split Washer
2 Page
JKS 110 0
JKS Adjustable Bump Stop Installation
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