SPRINGS AND SHOCK ABSORBERS
Contents
1. CE DIAGNOSIS Condition Possible Cause SPRINGS AND SHOCK ABSORBERS SPRINGS SAG OR a Springs sagged or taken set BOTTOM b Broken bent or weak spring leaves SPRING NOISE a Loose U bolts b Loose or worn shackle bushings c Worn or missing interliners SPRING BREAKAGE a Loose U bolts b Shock absorber inoperative STRUT CRACKING OR GRUNTING NOISE AT REAR OF IMPERIAL MODELS a Loose strut bushing bolt nut b Faulty strut bushing SHOCK ABSORBER NOISY a Bushing excessively worn b Faulty internal valve c Air trapped in unit SHOCK ABSORBER DRIPPING OIL a Faulty seal Correction a Replace spring b Replace spring main leaf or spring as necess ary a Tighten U bolt nuts 45 foot pounds b Replace bushings and tighten shackle bolt nuts 40 foot pounds c Install new interliners a Tighten U bolt nuts 45 foot pounds b Replace spring and shock absorber a Tighten the strut bushing bolt nut to 65 foot pounds b Install new bushing Tighten bushing bolt nut to 65 foot pounds a Replace bushings b Replace shock absorber c Bleed the shock absorber a Replace shock absorber 17 2 SPRINGS AND SHOCK ABSORBERS SERVICE PROCEDURES SHOCK ABSORBERS Front Shock Absorber Removal 1 Remove the nut and washer Fig 1 from the up per end of the shock absorber control rod 2 Compress the shock absorber by pushing th2. GROUP 17 SPRINGS AND SHOCK ABSORBERS CONTENTS Page Page DESCRIPTION 2 0 0 eee ee ee ee ee 1 SHOCK ABSORBERS 2 SERVICE DIAGNOSIS 6 1 SPECIFICATIONS At Rear of Manual REAR SPRINGS icc ce ewe eae 4e 4 alee 3 TIGHTENING REFERENCE At Rear of Manual Description It is important that spring U bolts be inspected at regular intervals and kept tight to prevent spring breakage The spring shackles should be inspected occasional ly to make sure they are tight but not binding No lubrication of any kind should be used on the rear springs or rubber bushings Zinc Interleaves Zinc Interleaves are used be tween the spring leaves for heavy duty suspension equipped vehicles to help increase spring life Zinc In terleaves are flat pieces of zinc or metal to help cush ion the spring leaves They are used between each leaf for heavy duty suspension Springs may bottom under abnormal loading con ditions particularly when road dips and railroad cross ings are encountered at relatively high speeds The oriflow shock absorber cannot be refilled or disassembled When servicing is required the shock absorber must be removed and a new unit installed NOTE Shock absorbers should only be replaced if they have lost their resistance are damaged or if they drip oil Evidence of slight oil moisture on out side of shock absorber is not cause to replace them SERVI
3. e rod through the shock absorber support 3 Remove the lower mounting bolt and remove the shock absorber 4 If the upper bushing appears worn damaged or deteriorated remove it by first pressing out the in ner steel sleeve then prying out or cutting out the rubber bushing This bushing takes some permanent set so that once removed it should be replaced 5 If the lower bushing is to be replaced remove it from the shock absorber using Tool C 3553 to press on the outer sleeve of the bushing Fig 2 Press ing on the inner sleeve will not remove the outer sleeve from the shock absorber Installation 1 To aid the installation of the upper bushing dip the bushing in water start it into the frame opening with a twisting motion then press or tap it into place When installed properly the groove in the bushing will index with the opening in the shock absorber tow er 2 Install the steel sleeve in the bushing ee ka WASHERS BOLT NK542 Fig 1 Front Shock Absorber Fig 2 Replacing Shock Absorber Bushing 3 Using Tool C 3553 press the lower bushing into the shock absorber eye until it is centered Always press against the outer steel sleeve to avoid damage to the assembly 4 Bleed and test the shock absorber then compress it to the shortest length 5 Install the lower cup washer concave side up on the rod and into position 6 Hold the shock absorber in the installed posi
4. e the interliner makes contact is clean and smooth ee 61x269 B Fig 5 Separating Spring Leaves 61 x 270B Fig 6 Positioning the Interliner 17 4 SPRINGS AND SHOCK ABSORBERS 2 Insert the interliner between the spring leaves Fig 6 until the fasteners are aligned with the holes 8 Force the fastener into the hole in the spring leaf Fig 7 4 Position the aligning clip Fig 8 and tighten the retainer nut De not lubricate the rear springs The interliners act as the friction control and need no lubrication ZINC INTERLEAF REPLACEMENT Heavy Duty Suspension AC 1 AC 2 AC 3 Models 1 Remove the rear spring 2 Remove the center bolt from the spring and sep arate the leaves 3 Install the zinc interleaves between the spring leaves and install the center bolt 4 Tighten the center bolt to 10 foot pounds Measuring Rear Spring Height When measuring the rear spring heights the vehicle should be placed on a level floor have the correct front suspension height the correct tire pressures no passenger or luggage compartment load and a full tank of fuel 1 Jounce the vehicle several times front bumper first Release the bumpers at the same point in each cycle 2 Measure the shortest distance from the highest point on the underside of the rear axle bumper strap at the rear of the bumper to the top of the axle hous ing 3 Measure both the right and left sides If these measureme
5. er when it is in the upside down or in a horizontal position other wise air will enter the cylinder tube A steady resistance should be felt when the shock absorber is extended or compressed If no resistance is felt replace the shock absorber REAR SPRINGS Front Pivot Bushing Replacement Removal of the old bushing and installation of the new bushing is performed in one operation using Tool C 3709 Fig 4 1 On bolt SP 3178 position the bearing washer SP 92 thrust bearing SP 332 bushing adapter SP 3179 flat side of adapter next to the washer spring leaf bushing and remover adapter SP 3180 2 Insert bolt SP 3178 through the bushing to be removed 3 Install adapter SP 3242 on bolt SP 3178 The slot in adapter SP 3242 should be visible to aid in the correct positioning of the bushing as it is being installed 4 Tighten bolt SP 3178 to remove the old bush ing and install the new bushing Remove the tool after the new bushing has been correctly positioned REAR SPRING INTERLINERS Removal 1 Raise the rear of the vehicle until the shock ab SPRINGS AND SHOCK ABSORBERS 17 3 aie SP 3179 SP 3180 SP 3242 SPRING SP 3178 NY 204 Fig 4 Spring Pivot Bushing Replacement sorbers are fully extended 2 Remove the alignment clips from the spring 3 Separate the spring leaves Fig 5 and remove the interliners Installation 1 With the leaves separated be sure the spring leaf area wher
6. l the pivot bolts and nuts finger tight only 2 Install the spring shackles and nuts 3 Install the spring U bolts and nuts 4 Tighten the spring U bolt nuts 50 foot pounds and shackle bolt nuts 40 foot pounds 5 Connect the shock absorbers SPRINGS AND SHOCK ABSORBERS 17 5 6 Remove the vehicle floor stands and with the vehicle weight on the wheels tighten the front pivot bolt to 125 foot pounds torque 7 The bushings and shackles should not be lubri cated at any time Measure the vehicle curb height whenever a rear spring or shackle has been replaced
7. nts vary by more than inch from side to side it is an indication that one of the rear springs may need replacing It is normal for rear springs to show some reverse arch even with no load so appearance alone should not be the reason for spring replacement Rear Spring Removal 1 With the vehicle body frame supported on the 61 x 2718 Fig 7 Installing Interliner Fastener p Fig 8 Positioning Alignment Clip 61 x 272B floor stands and jack pressure under the axle hous ing disconnect the shock absorbers from the studs on the spring plates 2 Lower the jack until it supports only the weight of the axle housing and remove the rear spring rear shackle Fig 9 3 Loosen the rear spring pivot bolt nut The nut should be backed off until it is retained on the pivot bolt by two or three threads 4 Using a pry bar between the pivot bolt nut and the body frame force the pivot bolt outward until the nut contacts the spring mounting bracket 5 Remove the pivot bolt nut and using a suitable tool force the pivot bolt out of the spring 6 Remove the spring U bolts and the spring Rear Spring Installation 1 Position the springs in their respective front NUT lt 2 INSERT Na A e BUSHING PLATE RO cof Beer fp STATION S WAGON SPRING SHACKLE A S BUSHING screw Cg ne NUT og Se BUSHING SCREW NK536 Fig 9 Rear Spring Assembly hangers and instal
8. tion in the frame Slide the upper cup washer con cave side down over piston rod and down onto the bushing Install the nut finger tight 7 Position the lower end of the shock absorber in the mounting bracket on the lower control arm and Fig 3 Rear Shock Absorber install the retaining bolt lockwasher and nut Tight en the nut to 55 foot pounds While holding the pis ton rod tighten the piston rod nut to 25 foot pounds Rear Shock Absorber Replacement On Imperial models the rear shock absorbers are mounted on studs at the upper and lower ends On Chrysler models the shock absorbers are attached to studs on the lower ends and by bolts at the upper ends Fig 3 1 Remove nuts and washers attaching the shock absorbers 2 Inspect the bushings for wear or damage and replace as necessary 3 Test and bleed the shock absorber 4 Position the shock absorber on the mounting studs or bolts and install the cupped washers and nuts Do not tighten the nuts until the full weight of the vehicle is on the wheels 5 Tighten the lower stud nut 50 foot pounds and the upper nuts 70 foot pounds Testing and Bleeding Shock Absorbers Hold the shock absorber in an upright position with the dust shield or piston rod section upward Extend the shock absorber to the maximum length and turn it upside down Compress the shock absorber Repeat this procedure to make sure all air is removed from the unit Do not extend shock absorb
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