Rough-country 478.20 User Manual download pdf

08-10 F250 4.5” SUSPENSION KIT

92147800

Tools Needed:

8mm Wrench 1 1/8” Wrench

10mm Wrench 1 13/16” Wrench

12mm Wrench Jack Stands

15mm Wrench Jack

17mm Wrench Drill

17mm Socket Drill Bits-13/16-7/8

18mm Wrench

18mm Socket

19mm Wrench

21mm Wrench

24mm Socket

30mm Socket

Thank you for choosing Rough Country for your suspension needs.

Rough Country recommends a certified technician installs this system. In addition to these instructions, professional

knowledge of disassemble/reassembly procedures as well as post installation checks must be known. Attempts to install

this system without this knowledge and expertise may jeopardize the integrity and/or operating safety of the vehicle.

Please read all the instructions before beginning the installation. Check the kit hardware against the parts list. Be sure

you have all the needed parts and understand where they go. Also please review the tools needed list and make sure

you have needed tools.

PRODUCT USE INFORMATION

As a general rule, the taller a vehicle is the easier it will roll. We strongly recommend seat belts and shoulder

harnesses should be worn at all times. Avoid situations where a side rollover may occur.

Braking performance and capabilities are decreased when significantly larger/heaver tires and wheels are used. Take

this into consideration while driving. Also, speedometer recalibration is necessary when larger tires are installed.

Do no add, alter, or fabricate any factory or after-market parts which increase vehicle height over the intended height of

the Rough Country product purchased. Mixing component brands, lifts, and/or combining body lift with suspension lifts

voids all warranties. Rough Country makes no claims regarding lifting devices and excludes any and all implied claims.

We will not be responsible for any product that is altered.

This kit is packaged as a leveling kit—raising the front 4.5” and the back 3”. If you desire a different look or if the vehicle

has a tool box or added weight in the rear, please consult with your sales representative about block / u-bolt options.

This 4.5” suspension system was developed for 35x12.50x17 tire on an after market wheel w/ 4.5” back spacing.

If equipped with factory rear contact overload springs, please note that they will need to be removed with the

addition of the block / or add-a-leaf combination on this kit.

NOTICE TO DEALER AND VECHICLE OWNER

Any vehicle equipped with any Rough country product must have the “Warning to Driver” decal installed on the sun visor

or dash. The decal is to act as a constant reminder for whoever is operating the vehicle of its unique handling character-

istics. INSTALLING DEALER—It is your responsibility to install the warning decal and to forward these installation in-

structions on too the vehicle owner for review and to be kept in the vehicle for its service life.

Kit Contents:

Coil Springs

Gas Coil Springs

1594Box1 Track Bar Bracket

Radius arm Drop Brkts

Sway Bar links

Pass Sway Bar Bracket

Driver Shim Plate

Carrier Drop Bracket

Pitman Arm

Bumpstop spacer

Dr & Pass Brake Lines

1580Box4 Shock Box

6578 3” Block and U-Bolt Kit

Torque Specs:

Size Grade 5 Grade 8

5/16” 15 ft/lbs 20 ft/lbs

3/8” 30 ft/lbs 35 ft/lbs

7/16” 45 ft/lbs 60 ft/lbs

1/2” 65 ft/lbs 90 ft/lbs

9/16” 95 ft/lbs 130 ft/lbs

5/8” 135 ft/lbs 175 ft/lbs

3/4” 185 ft/lbs 280 ft/lbs

Class 8.8 Class 10.9

6MM 5 ft/lbs 9 ft/lbs

8MM 18ft/lbs 23 ft/lbs

10MM 32ft/lbs 45ft/lbs

12MM 55ft/lbs 75ft/lbs

14MM 85ft/lbs 120ft/lbs

16MM 130ft/lbs 165ft/lbs

18MM 170ft/lbs 240ft/lbs

1 2 3 4 5 6 7 8

Summary of Contents

Page 1

08-10 F250 4.5” SUSPENSION KIT 92147800 Tools Needed: 8mm Wrench 1 1/8” Wrench 10mm Wrench 1 13/16” Wrench 12mm Wrench Jack Sta

Page 2 - Photo 5

FRONT INSTALLTION INSTRUCTIONS 1. Block the rear wheels of the vehicle. Raise the front of the vehicle and support the frame with jack stands. Remove

Page 3

12. Insert the radius arm drop bracket into the stock location. See Photo 8. Bolt into place using the supplied spacer sleeves and 3/4” x 4 3/4” bolt

Page 4 - Photo 14

25. Install tires and wheels and lower the vehicle to the ground. 26. Line up the track bar with the hole in the new track bar bracket. You may have

Page 5 - Photo 1

28. Remove the cotter pin and nut using a 21mm wrench, from the drag link end where it attaches to the pitman arm. Dislodge link with a tie rod end pu

Page 6 - Photo 2

REAR INSTALLATION Photo 2 1. Chock front wheels and jack up the rear of the vehicle. Secure with jack stands on the frame rail. 2. Place a floor j

Page 7

POST INSTALLTION INSTRUCTIONS 1. Adjust steering wheel to re-center prior to driving. 2. Check all fasteners for proper torque. Check to ensure fo

Page 8 - Available from Rough Country

Don’t forget your RCX Dual Stabilizer Kit ! Available from Rough Country

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Rough-country 478.20 User Manual

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