Hellwig Pro Series Silence User Manual
Page 2
7. Adjust the U-bolts at the end to desired preload. The minimum tension adjustment is having enough tension on
the end U-bolts so that they do not loosen or rattle and move when the vehicle is driven over rough or bumpy
surfaces. Maximum adjustment is when the leaf cups have been deflected two (2) inches from their free state.
DO NOT EXCEED THE MAXIMUM ADJUSTMENT OF 2 INCHES.
8. When adjustment is complete, double nut to lock in adjustment.
9. Lower vehicle to the ground and check your installation for clearance on all undercarriage components; wires,
fuel, brake, and air conditioning lines. Test drive the vehicle and recheck your installation, adjust as needed.
Recheck on a monthly basis thereafter.
IMPORTANT NOTE:
CHECK YOUR INSTALLATION. ARE ALL NUTS AND BOLTS SECURELY
TIGHTENED AND DOUBLE NUTTED WHERE PROVIDED? BOUNCE THE VEHICLE CHECKING
FOR CLEARANCE ON ALL UNDERCARRAIGE COMPONENTS, MUFFLERS, GAS FILLER PIPES,
BRAKE LINES, EMERGENCY BRAKE CABLE, AIR CONDITIONING LINES, RUBBER BOTTOMING
PADS, ETC.
IMPORTANT NOTES, WARNINGS AND TIPS
Before attempting the installation of any Hellwig Accessory Spring , be sure and identify the vehicle to which the
accessory spring will be installed as either being or not being equipped with height sensing brake fluid proportioning
valve. If a vehicle is equipped with the brake fluid proportioning valve on the rear axle, it is recommended that any
Hellwig Full Time Accessory Spring NOT be installed. Only the Progressive Rate Accessory Springs are to be in-
stalled on these vehicles. Some of the vehicles manufacturers (FORD, GM, DODGE) have recommended an adjust-
ment or modification of the brake system. If the vehicles height or weight requirements have been changed due to the
suspension modifications or unusual load situations, contact your local dealer for correct adjustment after installation.
If you have any questions about the application, please contact Hellwig Products Company.
ATTENTION INSTALLER:
BE SURE THAT THE CUSTOMER RECEIVES THIS INSTRUCTION SHEET,
ALL IMORTANT NOTE CARDS AND THE WARRANTY FORM
559-734-7451 800-367-5480 FAX 559-734-7460
009 ( R-009)
12/06/06