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L579 DATE: April 2021 REVISION: H TECHNICAL PROCEDURE TRAILER SUSPENSION SYSTEMS SUBJECT: Alignment Procedures LIT NO: L579 DATE: April 2021 REVISION: H TABLE OF CONTENTS Important Safety Notices ....................................................................................................................... 2 Conventions Applied in This Document ................................................................................................... 2 Explanation of Signal Words ........................................................................................................................ 2 Hyperlinks ................................................................................................................................................... 2 Contacting Hendrickson............................................................................................................................... 2 Relative Literature ....................................................................................................................................... 3 Other relative literature may include: ............................................................................................................ 3 Preparing Trailer for Maintenance Service .................................................................................................... 3 Tools And Equipment ................................................................................................................................... 4 TORX® Sockets ............................................................................................................................................ 4 Pivot Connection - Frame Bracket .......................................................................................................... 5 Pivot Connection - Welded Collar ................................................................................................................. 6 Pivot Connection - QUIK-ALIGN® ................................................................................................................... 6 Pivot Connection - Y-Beam .................................................................................................................... 7 Alignment Background .......................................................................................................................... 8 Alignment Preparations ....................................................................................................................... 10 Axle Alignment ................................................................................................................................... 12 Kingpin to Front Axle Alignment Check ....................................................................................................... 12 Axle-Axle Alignment Check ......................................................................................................................... 15 Axle Alignment Adjustment ................................................................................................................. 16 QUIK-ALIGN® Axle Adjustment .................................................................................................................... 16 Welded Collar Axle Adjustment .................................................................................................................. 19 CONNEX® ST Axle Alignment ............................................................................................................... 21 Locking the Self-Steer Axle ......................................................................................................................... 21 Check and Adjust Toe ................................................................................................................................ 23 CONNEX® ST Alignment Summary .............................................................................................................. 24 QUICK-ALIGN® .................................................................................................................................... 25 Pivot Connection Hardware Troubleshooting .............................................................................................. 26 Appendix A: Axle Target Value Sample Calculation .............................................................................. 29 ALIGNMENT PROCEDURES IMPORTANT SAFETY NOTICES IMPORTANT: An operating procedure, practice or Hendrickson literature number T12007 Technical condition that is essential to emphasize. Procedure General Safety Precautions and Information, available at www.Hendrickson-intl.com/TrailerLit, or Safety Alert Symbol used to indicate includes important preparation, precautionary and a condition exists that, if not avoided, safety information pertaining to the procedures may result in personal injury or harm included in this document. to individuals. It must be applied to DANGER, WARNING and CAUTION To help prevent personal injury and equipment statements, which emphasize severity. damage; warnings, cautions and other relative statements included in Hendrickson literature number HYPERLINKS T12007 are to be read carefully and applied during Hyperlinks are identified by a dark grey line under the the performance of the procedures included in this linked text. Internal links allow the reader to jump to document. a heading, step or page in this document. External links open the website or document referenced. While Improper maintenance, service or repair can cause viewing electronically, activate the hyperlink by clicking damage to the vehicle and other property, personal on the underlined text. injury, unsafe operating conditions and potentially void the manufacturer’s warranty. CONTACTING HENDRICKSON Contact Hendrickson Trailer Technical Services for technical assistance as needed. To do so, several CONVENTIONS APPLIED IN THIS options are available. Technical Services must be DOCUMENT contacted before performing any warranty related Various techniques are used in this document to convey service. important information, express safety issues, provide methods for CONTACTING HENDRICKSON and how to NOTE: DO NOT service a suspension or any identify and apply HYPERLINKS. component that is under warranty without first contacting Hendrickson Technical Services. EXPLANATION OF SIGNAL WORDS Hazard signal words (such as DANGER, WARNING or Prior to contacting Technical Services, it is best to CAUTION) appear in various locations throughout this have the following information about the vehicle and publication. Information accented by one of these Hendrickson suspension available (all that apply): signal words must be observed at all times. Additional • Hendrickson suspension information, (refer to L977 notes are utilized to emphasize areas of procedural Suspension and Axle Identification) – importance and provide suggestions for ease of repair. − Suspension model number The following definitions comply withANSI Z535.6 and − Suspension serial number indicate the use of safety signal words as they appear − Approximate number of suspension miles throughout the publication. • Trailer information (located on VIN plate) - DANGER Indicates a hazardous situation that, − Type (van, reefer, flat bed, etc...) if not avoided, will result in death or − Manufacturer serious injury. − VIN (vehicle identification number) − In-service date 1 WARNING Indicates a hazardous situation that, if not avoided, could result in death or − Fleet/owner name serious injury. − Unit # CAUTION Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury. NOTICE Indicates information considered important, but not hazard-related (e.g. messages relating to property damage). 1 If the in-service date is unknown or not available, the vehicle date of manufacture will be substituted. L579 H 2 ALIGNMENT PROCEDURES • Failure information OTHER RELATIVE LITERATURE MAY INCLUDE: − Description of the system problem, the part number and/or the part description of the NAME DESCRIPTION reported non-functioning part. B31 Torque Specifications − Date of failure. L427 Bushing Replacement Procedure − Where applicable, location of problem on L459 Checking Trailer Ride Height suspension / trailer (e.g., road side, front axle, L577 HT™ Series Suspension Installation Procedures rear axle, curb side rear, etc.). L583 Comprehensive Warranty Statement • Digital photos of suspension and damaged areas. L785 Pre-aligned VANTRAAX® Warranty Update • Special application approval documentation L874 Pre-aligned VANTRAAX Alignment Verification (if applicable). Procedure L926 Factory-torqued Curbside Pivot Connection PHONE ® Contact Hendrickson Trailer Technical Services directly L1072 QUIK-ALIGN Pivot Connection Fastener Information in the United States and Canada at 866-RIDEAIR T62001 Self-steer Axle Installation and Maintenance (743‑3247). From the menu, select: Procedures • Technical Services/Warranty for technical Table 1: Relative Literature information. • Other selections include: Hendrickson reserves the right to make changes and − Aftermarket Sales for replacement parts improvements to its products and publications at any information and ordering. time. Consult the Hendrickson website − Original Equipment Sales for parts inquiries and www.Hendrickson-intl.com/TrailerLit ordering for trailer manufacturers. EMAIL for the latest version of this manual. [email protected] PREPARING TRAILER FOR MAINTENANCE SERVICE Contact Hendrickson
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