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HN

®

 FR Series

17730-285 

23 

Component Replacement

SECTION 8

Component Replacement

FASTENERS

When servicing a vehicle Hendrickson recommends replacing all removed fasteners 
with new equivalent fasteners. Maintain correct torque values at all times. Check torque 
values as specified. See Hendrickson’s Torque Specifications Section of this publication. 
If non-Hendrickson fasteners are used follow torque specifications listed in the vehicle 
manufacturer’s service manual. 

SERVICE HINT 

When replacing components on the HN FR suspension, work one side of the vehicle at a time 
and only lift the vehicle enough to remove load and component. This will help maintain axle 
orientation and help reduce labor time.

SADDLE

DISASSEMBLY

1.  Chock the front wheels of the vehicle. 

2.  Remove the fasteners from the upper anchor plate assembly and auxiliary spring mounting 

plate, see Figure 8-1. Remove anchor plate.

3.  Remove the three (3) carriage bolts securing the auxiliary spring to the saddle assembly. 

Remove the auxiliary spring, auxiliary spring mounting plate and auxiliary spring mounting 
plate shim and ½" washer, see Figure 8-1.

FIGURE 8-1

4. Loosen, 

DO NOT

 remove, the upper eight (8) 

7

⁄

16

" fasteners connecting the bolster springs 

to the saddle assembly, see Figure 8-2.

5.  Remove the lower eight (8) 

7

⁄

16

" fasteners connecting the bolster springs to the Vee bracket, 

see Figure 8-2.

Pro Gear and Transmission  • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]

Содержание Hendrickson HN 422FR

Страница 1: ...part specialists at Pro Gear and Transmission Pro Gear Transmission has same day shipping and 1000 s of products in stock and ready to ship internationally for your next project For parts or service c...

Страница 2: ...xiliary Spring Assembly 16 Rebound Strap 17 Longitudinal and Transverse Torque Rods 17 Section 7 Alignment Adjustments 18 Drive Axle Alignment Inspection Procedure 18 Bar Pin Alignment 19 Bar Pin Alig...

Страница 3: ...ada or e mail techservices hendrickson intl com The latest revision of this publication is also available online at www hendrickson intl com SECTION 2 Product Description FIGURE 2 1 HN FR Series Suspe...

Страница 4: ...ckets Weight saving high strength design increases carrying capac ity and durability Rebound Control Strap Protects bolster springs from severe rebound tension Torque Rods Enhance handling during brak...

Страница 5: ...age the vehicle or render it unsafe This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible inju...

Страница 6: ...PERSONAL INJURY OR PROPERTY DAMAGE AND WILL VOID ANY APPLICABLE WARRANTIES USE ONLY HENDRICKSON AUTHORIZED REPLACEMENT PARTS TORCH WELDING DO NOT USE A CUTTING TORCH TO REMOVE ANY FASTENERS THE USE OF...

Страница 7: ...G SOLVENT CLEANERS CAN BE FLAMMABLE POISONOUS AND CAUSE BURNS TO HELP AVOID SERIOUS PERSONAL INJURY CAREFULLY FOLLOW THE MANUFACTURER S PRODUCT INSTRUCTIONS AND GUIDELINES AND THE FOLLOWING PROCEDURES...

Страница 8: ...ction with OTC No 51100 press plate and a 100 ton hydraulic shop press To order contact OTC 507 455 7000 or visit www otctools com for an OTC distributor BAR PIN END BUSHING RECEIVING TOOL This shop m...

Страница 9: ...b 36b 36b 38 38 39 39 41 41 38 Location of Auxiliary Spring Part Number 40 40 38 40 i i r j e i i J _ _ I i lj i i I f j I II i I 1 I i A I 1 I I Ii I r r ii i I I t I ii I I I I j I I I I I I I II I...

Страница 10: ...t Straddle Straddle Includes Tube End Spacer End a 60218 000 ULTRA ROD 27 Max Includes Key Nos 35a b 60223 000 ULTRA ROD 35 Max Includes Key Nos 35a 34 Two Piece Transverse Torque Rod Kit Straddle Tap...

Страница 11: ...22 28 15 62000 715 HN 422FR 23 03 72100 585 HN 542FR 582FR 24 02 72350 610 HN 542FR 29 13 62001 740 HN 482FR 23 62 72400 600 HN 542FR 24 02 72950 610 HN 542FR 582FR 25 00 72100 635 HN 542FR 582FR 24 2...

Страница 12: ...PECTION AT ONE 1 MONTH 1 Visually inspect suspension components check for Proper suspension function Signs of unusual movement loose or missing components Signs of abrasive or adverse contact with oth...

Страница 13: ...contact in the bushed joints Replace all worn or damaged parts Fasteners All fasteners must be inspected at pre delivery after the first month and every twelve months thereafter Look for any loose or...

Страница 14: ...connection c Look for worn frayed or distorted rubber in the equalizing beam end bushing d Look for the equalizing beam to be lower in the beam hanger e The gap on each side of the visible rubber at...

Страница 15: ...lacement see Component Replacement Section of this publication AXLE BRACKETS The axle brackets are furnished and welded into position by the vehicle or axle manufacturer When inspecting the equalizing...

Страница 16: ...or excessive wear Hendrickson recommends that both bolster springs installed on that equalizing beam assembly be replaced When the bolster springs are replaced on one side only the vehicle may lean sl...

Страница 17: ...de of the vehicle see Figure 6 7 An unloaded bolster spring may be inspected for any bonding separa tion by measuring at points indicated in Figure 6 7 as Any thin film or other residual rubber materi...

Страница 18: ...rive line angle and alignment The longitudinal torque rods control pinon angles and also absorb accel eration and braking forces The transverse torque rods control the side to side inputs such as corn...

Страница 19: ...with the alignment process 6 Ensure all drive axle tires are the same size FIGURE 7 1 7 Securely clamp a six foot piece of STRAIGHT bar stock or angle iron across the lower frame flange as shown in Fi...

Страница 20: ...e of the positions shown in Figure 7 2 or 7 3 Hendrickson has three shim designs options for alignment part number 50130 000 provided 50131 000 and 57026 000 see Figure 7 5 A BAR PIN SHIM MUST BE INST...

Страница 21: ...ust be converted to thrust angle see alignment equipment manufacturer for procedures 3 Chock the wheels of the front axles to prevent vehicle movement during service 4 Raise the frame of the vehicle t...

Страница 22: ...0 have two 3 16 legs and a 3 8 back see Figure 7 5 Rotating the shim pairs 90 will change the axle alignment in 3 16 increments If finer adjustments are required use an optional alignment shim P N 501...

Страница 23: ...f shims in place or a vehicle lean may result Most production vehicles are manufactured with three 3 auxiliary spring shims above the auxiliary spring see Figure 7 6 However some vehicles are manufact...

Страница 24: ...eners from the upper anchor plate assembly and auxiliary spring mounting plate see Figure 8 1 Remove anchor plate 3 Remove the three 3 carriage bolts securing the auxiliary spring to the saddle assemb...

Страница 25: ...s the bolster springs DO NOT tighten at this time IF THE VEE BRACKET LOCATED BETWEEN THE EQUALIZING BEAM AND THE BOLSTER SPRINGS IS DAMAGED REPLACEMENT IS REQUIRED FAILURE TO DO SO CAN CAUSE DAMAGE TO...

Страница 26: ...ng FIGURE 8 3 DISASSEMBLY 1 Chock the front wheels of the vehicle 2 Raise the frame of the vehicle just enough to remove the load from the bolster springs Support the frame at this height with frame s...

Страница 27: ...be cut or separated to replace rebound strap ASSEMBLY 1 Install the upper anchor plate through the rebound strap 2 Attach the upper anchor plate to the auxiliary spring mounting plate Tighten the fas...

Страница 28: ...R SPRINGS FROM BEING DAMAGED BY THE THREADED ENDS OF THE BOLTS 1 Install the bolster springs between the equalizing beam and saddle 2 Loosely install the fasteners securing the bolsters to the saddle...

Страница 29: ...ualizing beam see Figure 8 7 2 Install the four Vee bracket fasteners DO NOT tighten at this time THE BOLSTER SPRING MOUNTING BOLT HEADS MUST BE POSITIONED AT THE RUBBER SIDE OF THE BOLSTER SPRINGS TO...

Страница 30: ...ASSEMBLY 1 Replace the shock absorbers by installing the 5 8 UNF locknuts retainer washers flat wash ers and rubber bushings from the bottom and top of both shock absorbers as shown in Figures 8 10 a...

Страница 31: ...am 3 Remove the lower end of the rebound strap from the equalizing beam by removing the lower anchor plate and fasteners see Figure 8 8 4 Remove the 4 fasteners that connect theVee bracket to the equa...

Страница 32: ...ve the equalizing beam from the axle brackets ASSEMBLY NOTE All equalizing beams are manufactured with the bar pin flats perpendicular to the equalizing beam s axis It is not necessary to adjust the b...

Страница 33: ...ete installation of the inboard alignment shim 6 Install the NEW 1 inboard bar pin fasteners DO NOT tighten at this time 7 Repeat Steps 4 through 6 for the FRONT OUTBOARD alignment shim 8 Chock the RE...

Страница 34: ...rienta tion as prior to disassembly Tighten the fasteners to the vehicle manufacturer s specifications 22 Re apply rear parking brake NOTE Prior to assembly of the rear fasteners ensure that all the b...

Страница 35: ...one equalizing beam end see Parts List Section of this publication YOU WILL NEED A shop press with a capacity of at least 100 tons Bar pin adapter set tool Refer to Special Tools Section of this publ...

Страница 36: ...placement instructions 1 Remove equalizing beam assembly from vehicle as detailed in the equalizing beam disas sembly instructions in this section 2 Place the equalizing beam in the shop press with th...

Страница 37: ...he press bed or receiving tool see Special Tools Section of this publication 2 Install OTC 1757 end bushing installation tool refer to Special Tools Section of this pub lication on the new end bushing...

Страница 38: ...SH ON THE INNER METAL OF THE BUSHING DOING SO WILL CAUSE DAMAGE TO THE BUSHING AND VOID WARRANTY FIGURE 8 23 6 Install the end bushing into the end hub by pressing on the installation tool until the i...

Страница 39: ...orque Rod Assembly 1 33 45 45 61 Nm 1 33 45 45 61 Nm 2 90 105 122 142 Nm 6 70 90 95 122 Nm 6 70 90 95 122 Nm 3 450 600 610 814 Nm 4 500 650 678 881 Nm 5 220 300 298 407 Nm 5 220 300 298 407 Nm 1 33 45...

Страница 40: ...pring Locknut 6 13 UNC 2B Grade C 90 105 122 142 3 Bar Pin Bushing Locknut 8 1 8 UNC Grade C 450 600 610 814 4 Bar Pin Bushing Bolt Head 8 1 8 UNC 2A Grade 8 500 650 678 881 5 Vee Bracket Locknut 8 10...

Страница 41: ...nt Adjust auxiliary spring to proper setting See Auxiliary Spring Adjustment in the Preventative Maintenance Section of this publication Damaged auxiliary spring assembly Replace auxiliary spring asse...

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