JKS BSE251 User Manual
INSTALLATION
INSTRUCTIONS
517-278-1226 • tech@jksmfg.com • www.jksmfg.com
491 W. Gareld Avenue, Coldwater, MI 49036
Product: Hydraulic Bump Shocks
Part Number: JKSBSE251
Applications: Wrangler JK, 2007+ (rear only)
Welcome
CONGRATULATIONS on purchasing a set of new Hydraulic BumpShocks 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 impor-
tant installation and maintenance information.
Important
INSTALLATION of this product is not reversible and
should only be performed by an experienced mechanic or fabricator.
CHASSIS MODIFICATIONS are required to install this
product. Do not attempt installation if you are inexperienced or uncomfortable with cutting and welding on
your vehicle’s frame.
THESE INSTRUCTIONS provide an overview of the installation process only, and are in no way a substitute
for the experience one needs to do the job properly.
DO NOT EXCEED maximum range of bump shock adjustment – see illustration on page 4.
Tools Required
Hydraulic Floor Jack and Jack Stands
Metric/Standard Socket Wrench Set
Spanner or Strap Wrench *
(or similar tool for tightening Bump Shock Nut)
Metal Cutting Tool (for cutting through frame)
Grinding/Sanding Tool
(for light material removal and smoothing)
Emory Cloth
(or similar abrasive for paint/plating removal)
Tape Measure
Felt Tip Marker (or similar marking tool)
Clamping Tool *
(for holding product in place during welding)
Welding Equipment
Drill with 1/8” and 3/8” Bits
Coil Spring Compressor *
Spray Lubricant (WD-40 or equivalent)
Anti-Seize Lubricant
Satin Black Spray Paint
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.
JKSB SE 251JKS Hydraulic Bump Shocks Installation
Page 1
Parts
Remove the factory upper bump stop holders from
the chassis brackets. H I N T: The bump stop holder
is welded to the chassis bracket and must be cut
free.
Description Part # QTY
A
Bump Shock Assembly RFC/BS02 2
B
Bump Shock Nut RFC/SN50 2
C
Jounce Adapter 03154 2
D
Bump Shock Chassis Tube 03155 2
Installation
1. PREPARE VEHICLE FOR CHASSIS
MODIFICATIONS
Remove rear track bar, shocks, coil springs, and
any other components that prevent you from ac-
cessing the factory rear bump stop holders. H I N T:
You will need to access this part of the chassis
from multiple directions so make sure you have
plenty of freedom to work.
Drill a small hole exactly through the center of
the factory upper bump stop holders and into the
chassis. Make sure drill is square with chassis.
HINT: This provides a reference point to work from
during installation, as center of BumpShock must
remain at the same centerline as the factory bump
stop.
Next remove the factory bump stop brackets from
the chassis. H I N T: The bracket is welded to the
chassis along its perimeter. It must be carefully
removed without gouging or otherwise damaging
the chassis.
With the bump stop holders and brackets re-
moved, clean the chassis of any remaining weld
material until smooth.
2. FRENCH CUT CHASSIS
The chassis rails must be frenched to accept the supplied
Chassis Tubes (D). When executed correctly, the Hydraulic BumpShock will be positioned on the same centerline
as the OE bump stop holder (identied by the previously
drilled reference hole). Also, the BumpShock must contact
the center of the landing pad on the axle when the suspen-
sion is compressed.
2 Page
JKSB SE 251
JKS Hydraulic Bump Shocks Installation
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