Hellwig Pro Series Silence - Manual

INSTALLATION INSTRUCTIONS
Thank you for purchasing a quality Hellwig Product.
PLEASE READ THIS INSTRUCTION SHEET COMPLETELY BEFORE STARTING YOUR INSTALLATIONPROCEDURES.
1. Raise the rear of the vehicle by the frame so that the rear tires are just slightly contacting the floor. Be sure to
block the front tires and use Jack Stands to support the vehicle by the frame.
2. Lay out the spring leaves into two (2) sets. Each will consist of a main leaf with u-bolt cups and a second leaf
without cups. Lay the leaves so that the long ends are all in the same direction. Stack the leaves so that the
main leaf is on top. The long end of the spring stack must be installed toward the rear of the vehicle and the
short end toward the front.
3. Place the spring stack on top of the main spring with the long end toward the rear of the vehicle.
4. Place the U-bolts with the straight legs in the cups at the ends of the spring with the silencer bushing between
the main spring and the helper spring as shown in the diagram. Loosely install the crossbars using the
hardware provided.
5. Adjust the crossbars on the end of the springs so that the adjacent leaf tip will not make contact with the
crossbar when the spring is deflected. It may be necessary to move the spring stack fore or aft for best
alignment.
6. Install the offset U-bolts with the offset toward the axle as shown in the diagram. The U-bolt should be
fastened as close to the hat section as possible. If you are working on 2-1/2” wide springs position the
outboard U-bolt leg against the outboard edge of the main spring to maximize brake hose, caliper, and backing
plate clearance. The U-bolts may also be installed with the legs pointing up and crossbars on top of spring to
provide additional clearance if required. Install the crossbar with the washers and nuts to connect to the main
spring. Torque the nuts to 65 ft-lb and double nut.
009 ( R-009) 12/06/06
TORQUE TABLE
BOLT SIZE: 3/8” = 20 -30 ft. lbs. – 7/16” = 35-45 ft. lbs. – ½” = 50-70 ft. lbs. – 9/16” = 70-90 ft. lbs
SAFETY: PARK YOUR VEHICLE ON A FLAT LEVEL SURFACE, SET THE PARKING AND CHOCK THE FRONT TIRES.
NOTE: THIS KIT INCLUDES LOCKNUTS WHICH REQUIRE TIGHTENING WITH A WRENCH AFETR BEING STARTED BY
HAND.
NOTE: IF YOUR VEHICLE IS EQUIPPED WITH A BRAKE FLUID PROPORTIONING VALVE ON THE REAR AXLE READ
INSERT (R -362)
IMPORTANT NOTE: IF YOUR VEHICLE IS EQUIPED WITH A FACTORY CONTACT OVER LOAD IT MUST BE REMOVED
BEFORE INSTALLING THE NEW HELPER SPRINGS.
IMPORTANT NOTE
: HELLWIG HELPER SPRINGS ARE DESIGNED TO INCREASE THE “LEVEL LOAD” CARRYING
CAPACITY OF YOUR VEHICLE. NEVER LOAD THE VEHICLE THAT THIS UNIT IS INSTALLED ON BEYOND THE
MANUFACTURER’S MAXIMUM GROSS VEHICLE WEIGHT RATING.
Offset U-bolts Crossbars
Leaf Tip
Straight U-bolt
Leaf Stack
Hat Section
Main Spring
Main Leaf
Second Leaf
Silencer Bushing
559-734-7451 800-367-5480 FAX 559-734-7460