Summary of Contents for Fabco SDA-2300
- Page 1 Brought to you by Pro Gear & Transmission. For parts or service call: 877-776-4600 407-872-1901 www.globaldifferentialsupply.com 906 W. Gore St. Orlando, FL 32805 parts@eprogear.com...
- Page 2 SDA- 2300 STEER ABLE DRIVE AXLE SERV ICE MAN UAL Fabco Automotive Corporation, Livermore, CA Ph: (925) 454-9500 1- (800) 967- 8838 FAX (925) 454-9501 www.fabcoautomotive.com 9/03...
- Page 3 ASBESTOS WARNING SUGGESTED PROCEDURES FOR WORKING WITH COMPONENTS SUSPECTED OF CONTAINING ASBESTOS Asbestos has been found to be a primary cause of various forms of respiratory dis- ease and cancer of several vital body organs. Primary ingestion is by breathing or swallowing airborne dust containing fibers.
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Page 4: Table Of Contents
TABLE OF CONTENTS – SDA-2300 PAGE INTRODUCTION ........................General Description......................Operation..........................Operating Instructions ......................Specifications ........................Steerable Drive Axle General Dimensions ................. LUBRICATION ........................... Wheel Bearings ........................Universal Joints ........................Kingpin Bearings ........................ Differential Carrier ......................Steering Tie Rod Ends ....................... - Page 5 9.13C Steerable End Removal Adapter 13 3/16" B.C..............9.14 Lower Kingpin Locknut Tool ....................9.15 Lower Kingpin Ball Stud Removal Tool ................9.16 Hub Bearing Locknut Tool....................10.0 ILLUSTRATED PARTS MANUAL ..................Copyright © 1996 Fabco Automotive Corporation, 151 Lawrence Drive, Oakland, CA 94551...
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Page 6: Introduction
When steered, the outer section of each steerable drive end rotates about the kingpin centerline. The U-joint, cen- The Fabco Steerable Drive Axle consists of four major tered on the kingpin centerline, allows power to be trans- assemblies; the axle housing, two steerable drive ends, mitted throughout the possible range of steering inputs. -
Page 7: Specifications
1.4 STEERABLE DRIVE AXLE SPECIFICATIONS — FABCO MODEL SDA-2300 MAXIMUM CAPACITY 23,000 Pounds Load Rating BRAKES Type Drum, `S' Cam Size 16.5 Diameter x 7 Inch Chamber 30 Square Inch Certification FMVSS 121 Slack Adjusters Automatic HOUSING Fabricated Steel, Cast Banjo, Center Bowl CAMBER 1/2°... -
Page 9: Lubrication
2.0 LUBRICATION 2.4 DIFFERENTIAL CARRIERS Differential carriers should have the lubricant changed at Recommended Lubricants the same interval as the rear axle on the vehicle, or ap- proximately 10,000 miles. Drain while lubricant is warm 1. Gear Oil: and clean the magnetic drain plug. Removal of the fill Temperature Grade plug will allow quicker drainage. -
Page 10: Kingpin Adjustment
5. Remove the wheel bearing locknut and washer 9. Reinstall the drive flange over the hub assem- from the spindle and loosen the bearing adjust- bly. Then torque the drive flange locknuts to ing nut. 175 lb.- ft. 6. Torque the bearing adjusting nut to 50 lb.-ft. 3.3 KINGPIN ADJUSTMENT while simultaneously rotating the hub assem- bly. -
Page 11: Toe-In Adjustment
3.4 TOE-IN ADJUSTMENT It is not recommended to raise the front of the truck to check toe-in; at the factory, the setting is made with the axle loaded to simulate actual operating conditions. An expandable toe-in alignment bar is recommended but if unavailable consult an alignment specialist. -
Page 12: Steering Stop Adjustment
3.5 STEERING STOP ADJUSTMENT The steering stop adjustment is made at the factory. There should be no need to alter it, unless a major com- ponent such as the axle housing or spindle yoke has been replaced for some reason. The turn angle is set at 35°, and this can be checked with a carpenter's power saw protractor on the wheel's inside rim and a T-square laid along the frame rail with the vehi-... -
Page 13: Brake Drum, Hub, And Wheel Bearings
OF EXPOSURE TO ASBESTOS DUST EXISTS. SEE ASBESTOS WARNING LOCATED IN THE FRONT THIS MANUAL. FABCO ORIGINAL EQUIPMENT BRAKE SHOES ARE NOT AS- BESTOS BASED. Figure #9 3. Remove the eight 5/8" outer drive flange locknuts. 7. Wheel bearing cups may be removed from the hub using a suitable puller. - Page 14 Figure #10 Figure #12 2. Insert a suitable pry bar down between the top of the brake shoe and a spindle locknut. Pry the shoe away from the S-cam and remove the 4. To remove the S-camshaft pry the retaining roller.
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Page 15: Spindle Yoke Removal
4. Remove the drive yoke bearing retaining snap 4.4 SPINDLE YOKE REMOVAL ring and thrust washer. The yoke shaft bearing 1. Due to its high torque, loosening the 4 1/8" lower removal is optional. Remember to repack the kingpin locknut (see Section 9.14 Special bearing upon installation. -
Page 16: Cleaning And Inspection
5.0 CLEANING AND INSPECTION 5.1 CHOICE OF CLEANING METHODS 1. Steam may be used for external cleaning of completely assembled units. Care must be taken to ensure that water is kept out of the as- sembly by tightly closing breather caps and other openings. -
Page 17: Steerable Drive End Assembly
If a driver is not available, use of a soft hammer and/or wood blocks may be made, pro- vided that care is exercised. Proprietary drivers are available directly from Fabco and drawings are also provided in Section 10.0 Figure #19 6.2 SPINDLE INSTALLATION... -
Page 18: Brake Equipment
10. Install the spindle over the yoke shaft and spin- bolt. It is recommended to replace the bolt with dle yoke studs. See Figure 23. a new one from Fabco. If a replacement bolt is not available, use the existing bolt and apply CAUTION: THE KEYWAY MUST BE LO- Loctite #272 to its threads during assembly. -
Page 19: Wheel Bearings, Hub, And Brake Drum
3. Push the air chamber mounting bracket onto the 8. Hook the two lower retaining springs into each S-camshaft. Then align the bracket on the brake shoe. By grasping the shoes at the top steering arm or upper kingpin cap. Insert the and spreading them apart, the circular recess in two 7/8"... -
Page 20: Additional Service Procedures
The steerable end removal 7. Loosen the lower kingpin locknut (see Section tool is available from Fabco, or it can be fabricated from 9.14 Special Tools) and completely remove the the drawings in Section 9.13 Special Tools. -
Page 21: Differential Carrier Removal
CAUTION: IF THE TOOL IS NOT AVAILABLE, ALTERNATE MEANS TO SUP- PORT THE DIFFERENTIAL CAR- RIER MUST BE FOUND BEFORE CONTINUING THIS PROCE- DURE. Figure #29 Figure #31 4. Remove all differential mounting bolts, washers and nuts. Roll the differential carrier away from the axle. -
Page 22: Torque Specifications
TIE ROD BALL JOINT CASTLE NUTS ..100 FT-LBS TIE ROD ADJUSTER CLAMP NUTS ..75 FT-LBS ALL TORQUE VALUES IN FT-LBS WITH DRY UNLUBRICATED THREADS 1 5/16”-12 STUD PILOTED 750-800 FT-LBS 175 FT-LBS 75 FT-LBS TORQUE SPECIFICATIONS, SDA-2300... -
Page 39: Lower Kingpin Locknut Tool
USE EITHER OF THE FOLLOWING 6 POINT SOCKETS OTC 1915 4 1/8” SNAP-ON ANS 1915A 4 1/8” 9.14 – LOWER KINGPIN LOCKNUT TOOL... -
Page 41: Hub Bearing Locknut Tool
MODIFY THE FOLLOWING 6 POINT SOCKET OTC 1918 4 7/8” TO FIT A 5” LOCKNUT (INSIDE CORNERS MAY REQUIRE REMOVAL OF MATERIAL) 9.16 – HUB BEARING LOCKNUT TOOL...
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