INSTALLATION GUIDE
Contents
1. 2 Attach the brake line clip N onto the emergency brake line bracket fig 9 3 Attach the clip assembly to the brake line bracket using a 5 16 bolt O two flat washers J and a nyloc nut M fig 9 4 Align the brake line bracket and clip assembly so that the two do not bind to the cable Tighten all mounting hardware in this assembly securely NOTE Be sure the cable does not rub against the bellows when it is fully inflated If it does adjust the assembly accordingly Brake line clip 5 16 Bolt 5 16 Flat washer b Brake line Nyloc nut Brake line fig 9 bracket INSTALLING THE HEAT SHIELD 1 Bend the tabs on the heat shield to provide a 1 2 dead air space between exhaust pipe and heat shield fig 10 2 Attach the heat shield R to the exhaust pipe using the clamps T fig 11 Bend the heat shield for maximum clearance to the air spring At least 12 of dead air space Bend tabs up P di Bm ms lt lt rom hea 2 shield to gt bellows must be at least 12 fig 11 8 MN 553 LoadLifter 5000 LF INSTALLING THE AIR LINES 1 Choose a convenient location for mounting the inflation valves Popular locations for the inflation valve are a The wheel well flanges b License plate recess in bumper c Under the gas cap access door d Through license plate itself NOTE What ever the chosen location is make sure there is enough clearance around the2. No Adding air springs will not change the weight ratings GAWR GCWR and or GVWR of a vehicle Exceeding the GWVR is dangerous and voids the Air Lift warranty Is it necessary to keep air in the air springs at all times and how much pressure will they need The minimum air pressure should be maintained at all times The minimum air pressure keeps the air spring in shape ensuring that it will move throughout its travel without rubbing or wearing on itself Is it necessary to add a compressor system to the air springs No Air pressure can be adjusted with any type of compressor as long as it can produce sufficient pressure to service the springs Even a bicycle tire pump can be used but it s a lot of work How long should air springs last If the air springs are properly installed and maintained they can last indefinitely Will raising the vehicle on a hoist for service work damage the air springs No The vehicle can be lifted on a hoist for short term service work such as tire rotation or oil changes However if the vehicle will be on the hoist for a prolonged period of time support the axle with jack stands in order to take the tension off of the air springs TUNING THE AIR PRESSURE Pressure determination comes down to three things level vehicle ride comfort and stability 1 MN 553 Level vehicle If the vehicle s headlights are shining into the trees or the vehicle is leaning to one side then it
3. 0 seen rennen nn 12 Maintenance Guidelines 0 000 cece 12 Troubleshooting Guide eee 12 Product USB soos e E REIR RUE ea 13 Frequently Asked Questions anuanua nauan ees 13 Tuning the Air Pressure 00 eh 13 Guidelines for Adding Air liliis eh 14 Warranty and Return Policy lt lt 14 Replacement Information see 15 Contact Information reeernn 15 e LoadLifter 5000 Introduction NOTE N The purpose of this publication is to assist with the installation maintenance and troubleshooting of the LoadLifter 5000 air spring kit LoadLifter 5000 utilizes sturdy reinforced commercial grade single or double depending on the kit convolute bellows The bellows are manufactured like a tire with layers of rubber and cords that control growth LoadLifter 5000 kits are recommended for most 34 and 1 ton pickups and SUVs with leaf springs and provide up to 5 000 Ibs of load leveling support with air adjustability from 5 100 PSI The kits are also used in motorhome rear kits and some motorhome fronts where leaf springs are used Itis importantto read and understand the entire installation guide before beginning installation or performing any maintenance service or repair The information here includes a hardware list tool list step by step installation information maintenance tips safety information and a
4. ECR 7435 091210 MN 553 Load LiP ua DEN Bio AT by AIR LIFT LET INSTALLATION GUIDE For maximum effectiveness and safety please read these instructions completely before proceeding with installation Failure to read these instructions can result in an incorrect installation TABLE OF CONTENTS INITOQUCHON gt sr vrs raster deste ess 2 Important Safety Notice oocooccccccccco tee 2 Notation Explanation 0 0 0 eae 2 Installation Diagram nun nn nun nn nun 3 Hardware List 0 6 cee ene eens 4 Tools LiSte 4 hades gets beeen Geos k ure qesc bir n amp scokQwa 44s dr 4 Installing the LoadLifter 5000 System 4 Getting Started ss grite eK nr ad de kx a Fa d ded 4 Assembling the Air Spring Assembly liiis 4 Removing the Jounce Bumper 0 00 cece ernennen 6 Positioning the Assembly on the Axle 2 0 0 0 cee ae 6 Attaching the Upper Bracket 000 cece 7 Aligning and Attaching the Assembly and Lower Bracket 7 Installing the Emergency Brake Line Bracket and Clip Lulu 8 Installing the Heat Shield liliis 8 Installing the Air Lines llle sitizi 9 Checking for Leaks verea mraeg eiad nidara ian rn 10 FIXING Leaks T 10 Installation Checklist 000 0c eee eee eee nn 11 Maintenance and Servicing oooooooooooomo 12 Minimum and Maximum Pressure
5. be identified and moved if possible If it is not possible to relocate the cause of the abrasion the air spring may need to be remounted If professionally installed the installer should be consulted Check all fasteners for tightness 11 aS Maintenance and Servicing Minimum Air Pressure Maximum Air Pressure NOTE LoadLifter 5000 5PSI 100 PSI FAILURE TO MAINTAIN CORRECT MINIMUM PRESSURE OR PRESSURE PROPORTIONAL TO LOAD BOTTOMING OUT OVER EXTENSION OR RUBBING AGAINST ANOTHER COMPONENT WILL VOID THE WARRANTY MAINTENANCE GUIDELINES By following these steps vehicle owners will obtain the longest life and best results from their air spring 1 Check the air pressure weekly 2 Always maintain normal ride height Never inflate beyond 100 PSI 3 If you develop an air leak in the system use a soapy water solution to check all air line connections and the inflation valve core before deflating and removing the spring 4 When increasing load always adjust the air pressure to maintain normal ride height Increase or decrease pressure from the system as necessary to attain normal ride height for optimal ride and handling Remember that loads carried behind the axle including tongue loads require more leveling force pressure than those carried directly over the axle FOR YOUR SAFETY AND TO PREVENT DAMAGE TO YOUR VEHICLE DO NOT EXCEED MAXIMUM GROSS VEHICLE WEIGHT RATING GVWR AS INDICATED BY THE VEHICL
6. flat washers J Leave the bolts loose at this time fig 2 and fig 3 4 Driver s Side Only Insert a 5 16 bolt O into the small hole on the lower bracket C before attaching the lower bracket to the air spring assembly fig 2 5 2500 HD Models Only Install a 3 8 bolt U and lock nut L through the hole in the lower bracket fig 2 with the head of the bolt facing down Tighten securely 6 Insert two 3 8 carriage bolts I through the large holes and into the square holes of the legs in the lower bracket fig 2 7 Attach the lower bracket C to the bottom of the bellow assembly using two 3 8 flat head screws P Tighten securely 3 8 Bo 9 g 3 8 Flat washer 3 8 Lock washer Upper bracket Roll plates Air spring 3 8 Carriage bolt _ Lona Lower bracket 3 8 Nyloc nut 3 8 Flat head M amp fig 2 3 8 Bolt lot B Outboard Slot A Slo NOTE The elbow fitting will eh En point toward the rear of the vehicle on the driver side and toward the front of the vehicle on the passenger side e F Inboard MN 553 5 LoadLifter 5000 a REMOVING THE JOUNCE BUMPER 1 Jack up the rear of the vehicle and support the frame with jack stands Drop the axle to gain clearance to install the assembly 2 Remove both jounce bumpers under the frame rail and discard POSITIONING THE ASSEMBLY ON THE AXLE NOTE
7. troubleshooting guide Air Lift Company reserves the right to make changes and improvements to its products and publications at any time For the latest version of this manual contact Air Lift Company at 800 248 0892 or visit our website at www airliftcompany com IMPORTANT SAFETY NOTICE The installation of this kit does not alter the Gross Vehicle Weight Rating GVWR or payload of the vehicle Check your vehicle s owner s manual and do not exceed the maximum load listed for your vehicle Gross Vehicle Weight Rating The maximum allowable weight of the fully loaded vehicle including passengers and cargo This number along with other weight limits as well as tire rim size and inflation pressure data is shown on the vehicle s Safety Compliance Certification Label Payload The combined maximum allowable weight of cargo and passengers that the truck is designed to carry Payload is GVWR minus the Base Curb Weight NOTATION EXPLANATION Hazard notations appear in various locations in this publication Information which is highlighted by one of these notations must be observed to help minimize risk of personal injury or possible improper installation which may render the vehicle unsafe Notes are used to help emphasize areas of procedural importance and provide helpful suggestions The following definitions explain the use of these notations as they appear throughout this guide INDICATES IMMEDIATE HAZARDS WHICH WILL RESULT IN S
8. E MANUFACTURER ALTHOUGH YOUR AIR SPRINGS ARE RATED AT A MAXIMUM INFLATION PRESSURE OF 100 PSI THE AIR PRESSURE ACTUALLY NEEDED IS DEPENDENT ON YOUR LOAD AND GVWR 5 Always add air to the springs in small quantities checking the pressure frequently Sleeves require less air volume than a tire and inflate quickly 6 Should it become necessary to raise the vehicle by the frame make sure the system is at a minimum pressure 5 PSI to reduce tension on the suspension brake components Use of on board leveling systems do not require deflation or disconnection Troubleshooting Guide 12 1 Leak test the air line connections threaded connection of the elbow into the air spring and the inflation valves See Fixing Leaks on page 10 for repair 2 Check for dirt debris in the valve core 3 Inspect the air lines to be sure none are pinched Tie straps may be too tight Loosen or replace the strap and replace leaking components 4 Inspect the air line for holes and cracks Replace as needed 5 Look for a kink or fold in the air line Reroute as needed If the preceding steps do not solve the problem it is most likely caused by a failed air spring either a factory defect or an operating problem Please call Air Lift at 800 248 0892 for assistance or a replacement air spring MN 553 LoadLifter 5000 Product Use R FREQUENTLY ASKED QUESTIONS Q Will installing air springs increase the weight ratings of a vehicle
9. EVERE PERSONAL INJURY OR DEATH INDICATES HAZARDS OR UNSAFE PRACTICES WHICH COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH INDICATES HAZARDS OR UNSAFE PRACTICES WHICH COULD RESULT IN DAMAGE TO THE MACHINE OR MINOR PERSONAL INJURY Indicates a procedure practice or hint which is important to highlight MN 553 LoadLifter 5000 Installation Diagram R 2500 HD Model Driver Side Shown The 3500 model has a different style strike plate L only on 2500 HD model U only on 2500 HD model Small weld nut z bracket must be 27 removed Only on 2500 HD model hc wad i fig 1 MN 553 SF LoadLifter 5000 HARDWARE LIST Item Part Description Qty Item Part Description Qty Al 58437 Air spring 57275 esses 2 O 17103 5 16 18 x 1 Bolt m en 2 A 58491 Air spring 57285 nee 2 P 17215 3 8 24 x 3 4 Flat head screw 4 B 07634 Upper bracket ssseeee 2 Q 10421 Lower brake bracket 1 C 03633 Lower bracket eennne 2 R 10613 Heat shield 24 1 D 11951 Roll plate 4 S 09484 Thermal sleeve ssssees 1 E 21848 Elbow fitting sss 2 T 10741 Heat shield clamp 2 F 10451 Axle strap aues 2 U 17101 3 8 16 x 3 4 Bolt 2 G 17203 3 8 24 x 7 8 Bolt aa
10. On the 2500 HD models only the driver side axle may have a small bracket with a nut that has nothing attached to it This bracket must be trimmed off of the axle in order to install the assembly fig 4 2500 HD Models 1 Set the assembly that has the cinch bolt onto the driver side NOTE It will be necessary to index the lower legs under the jounce bumper strike plate 2 With the lower bracket parallel to the strike plate hook one leg under the side of the strike plate and turn the assembly until the other leg is under the strike plate on the other side fig 4b 3 Once the legs are under the strike plate proceed with the upper bracket instructions Top view Strike plate i e Remove nut and bracket fig 4b With one leg hooked The leg on the lower bracket should hook under the strike plate under the sides of the turn the assembly to strike plate hook the other leg under the strike plate 3500 Models 1 Set the assembly on the strike plate so that the legs of the lower bracket are forward and behind the axle fig 5 Lower bracket Strike plate 6 MN 553 LoadLifter 5000 LF ATTACHING THE UPPER BRACKET 1 The elbow fitting points toward the rear of the vehicle on the driver side and toward the front of the vehicle on the passenger side 2 Insert two 3 8 bolts H and flat washers J through the existing jounce bumper holes and through the slotted holes in the upper bracket
11. Year Limited LoadLifter 5000 Lifetime Limited Wireless AIR 2 Year Limited Air Lift Performance 1 Year Limited Other Accessories 2 Year Limited formerly SuperDuty formerly EasyStreet and LifeStyle 8 Performance Replacement Information If you need replacement parts contact the local dealer or call Air Lift customer service at 800 248 0892 Most parts are immediately available and can be shipped the same day Contact Air Lift Company customer service at 800 248 0892 first if Parts are missing from the kit Need technical assistance on installation or operation Broken or defective parts in the kit Wrong parts in the kit Have a warranty claim or question Contact the retailer where the kit was purchased If it is necessary to return or exchange the kit for any reason If there is a problem with shipping if shipped from the retailer If there is a problem with the price Contact Information MN 553 If you have any questions comments or need technical assistance contact our customer service department by calling 800 248 0892 Monday through Friday 8 a m to 8 p m Eastern Time For calls from outside the USA or Canada our local number is 517 322 2144 For inquiries by mail our address is PO Box 80167 Lansing MI 48908 0167 Our shipping address for returns is 2727 Snow Road Lansing MI 48917 You may also contact us anytime by e mail at sales
12. a 4 AA 20086s Airline assembly 1 H 17108 3 8 16 x 1 5 Bolt acciaieria 4 BB 10466 Tie Strap ee 6 17141 3 8 16 x 2 5 Carriage Bolt 4 CC 21230 V alve Cap eniti tenentes 2 J 18444 3 8 Flat washer ssssess 23 DD 18405 5 16 Flat washer ssss 2 K 18427 3 8 Lock Washer sese 4 EE 21234 Rubber washer eeeessss 2 L 18435 3 8 Nyloc nut 10 FF 18411 Star WaS he asesinan 2 M 18438 5 16 Nyloc nut 2 GG 21233 5 16 Hex nut 4 N 10465 5 8 Cip ite ita tie rate nde 1 Missing or damaged parts Call Air Lift customer service at 800 248 0892 for a replacement part TOOLS LIST Description eere Qty Description eeeeeeeeeeeeee Qty Hoist or floor Jacks does ences 1 Ratchet with 9 16 metric amp 1 2 deep well Safety slands oim etin e ees 2 SOCK GUS uie enira iier te Gi 1 Safety glasses sssssseeeeeeeere 1 S e and 5 16 drill bits very sharp 2 Torque wrench eee tereti ean 1 Heavy duty dilll iiit 1 5 16 open end or box wrench sss 1 Hose cutter razor blade or sharp knife 1 7 16 open end or box wrench sss 1 Air compressor or compressed air source 1 9 16 open end or box wrench ss 1 Spray bottle with dish
13. airliftcompany com or on the web at www airlifttompany com 15 e Notes LoadLifter 5000 MN 553 LoadLifter 5000 Notes MN 553 R Need Help Contact our customer service department by calling 800 248 0892 Monday through Friday 8 a m to 8 p m Eastern Time For calls from outside the USA or Canada our local number is 517 322 2144 Register your warranty online at www airliftcompany com warranty R Thank you for purchasing Air Lift products the professional installer s choice Air Lift Company 2727 Snow Road Lansing MI 48917 or PO Box 80167 Lansing MI 48908 0167 Toll Free 800 248 0892 Local 517 322 2144 Fax 517 322 0240 gt www airliftcompany com Printed in the USA
14. ces will cause the vehicle to be heavier on one side fig 19 As much as a 50 PSI difference is not uncommon e mmm Hil le l Em Level fig 19 Warranty and Returns Policy 14 Air Lift Company warrants its products for the time periods listed below to the original retail purchaser against manufacturing defects when used on catalog listed applications on cars vans light trucks and motorhomes under normal operating conditions for as long as Air Lift manufactures the product The warranty does not apply to products that have been improperly applied improperly installed used in racing or off road applications used for commercial purposes or which have not been maintained in accordance with installation instructions furnished with all products The consumer will be responsible for removing labor charges the defective product from the vehicle and returning it transportation costs prepaid to the dealer from which it was purchased or to Air Lift Company for verification Air Lift will repair or replace at its option defective products or components A minimum 10 00 shipping and handling charge will apply to all warranty claims Before returning any defective product you must call Air Lift at 800 248 0892 in the U S and Canada elsewhere 517 322 2144 for a Returned Materials Authorization RMA number Returns to Air Lift can be sent to Air Lift Company 2727 Snow Road Lans
15. dges Use the plastic tie straps BB to secure the air line to fixed non moving points along the chassis Be sure that the tie straps are tight but do not pinch the air line Leave at least 2 of slack to allow for any movement that might pull on the air line Option 1 Option 2 On the passenger side only place the provided thermal sleeve S on the air line near the exhaust Cut off air line leaving approximately 12 of extra air line A clean square cut will ensure against leaks see fig 12 Insert the air line into the air fitting This is a push to connect fitting Simply push the air line into the 90 swivel fitting until it bottoms out 9 16 of air line should be in the fitting CHECKING FOR LEAKS 1 Inflate the air spring to 30 PSI and spray all connections and the inflation valves with a solution of 1 5 liquid dish soap and 4 5 water to check for leaks Spot leaks easily by looking for bubbles in the soapy water After the test deflate the springs to the minimum pressure required to restore the normal ride height no less than 5 PSI Check the air pressure again after 24 hours A 2 4 PSI loss after initial installation is normal Retest for leaks if the loss is more than 5 lbs FIXING LEAKS 1 2 If there is a problem with the swivel fitting a Check the air line connection by deflating the spring and removing the line by pulling the collar against the fitting and pulling fi
16. fig 6 NOTE lt may be helpful to raise the axle at this point so that the upper bracket touches the frame 3 Attach the upper bracket using two flat washers J and nyloc nuts L on each previously installed bolt fig 6 4 Push the bracket inboard and tighten both upper bolts NOTE There should be a thumbs width between the bellows roll plate D and the leaf spring U bolt Frame ro Bolt 3 8 Flat washer Jounce bumper holes Upper bracket sa kanssa fig 6 ALIGNING AND ATTACHING THE ASSEMBLY AND LOWER BRACKET 1 Bring the axle all the way up and remove the jack stand previously used to support the frame when removing the jounce bumper NOTE The upper bracket is slotted for forward and backward adjustment The bottom adjusts by moving the bracket on the axle in or out fig 7 3 Adjust the assembly so that the air spring is perpendicular to the bottom and top mounting brackets 4 Tighten the top mounting bolts to 20 ft lbs fig 7 Adjust in and out MN 553 7 R LoadLifter 5000 5 Attach the axle strap F to both lower bracket carriage bolts using two flat washers J and two nyloc nuts L Torque evenly to 16 ft Ibs fig 8 INSTALLING THE EMERGENCY BRAKE LINE BRACKET AND CLIP DRIVER SIDE ONLY 1 Attach the brake line bracket Q to the lower bracket using the previously installed 5 16 bolt O with one flat washer J and a nyloc nut M fig 9
17. inflation valves for an air chuck 2 Drill a 5 16 hole to install the inflation valves 3 Cut the air line assembly AA in two equal lengths CAUTION WHEN CUTTING OR TRIMMING THE AIR LINE USE A HOSE CUTTER A RAZOR BLADE OR A SHARP KNIFE A CLEAN SQUARE CUT WILL ENSURE AGAINST LEAKS DO NOT USE WIRE CUTTERS OR SCISSORS TO CUT THE AIR LINE THESE TOOLS MAY FLATTEN OR CRIMP THE AIR LINE CAUSING IT TO LEAK AROUND THE O RING SEAL INSIDE THE ELBOW FITTING FIG 12 oe Good Cut Poor Cut 4 Place a 5 16 nut GG and a star washer FF on the air valve Leave enough of the inflation valve in front of the nut to extend through the hole and have room for the rubber washer EE flat washer DD and 5 16 nut GG and cap CC There should be enough valve exposed after installation approximately 1 2 to easily apply a pressure gauge or an air chuck fig 13 5 Push the inflation valve through the hole and use the rubber washer EE flat washer DD and another 5 16 nut GG Tighten the nuts to secure the assembly in place fig 13 Air line to Vehicle body bellows or bumper 5 16 Flat washer 5 16 Hex nut Rubber washer MN 553 9 a 10 LoadLifter 5000 Route the air line along the frame to the air fitting on the air spring fig 14 Keep AT LEAST 6 of clearance between the air line and heat sources such as the exhaust pipes muffler or catalytic converter Avoid sharp bends and e
18. ing MI 48917 Product failures resulting from abnormal use or misuse are excluded from this warranty The loss of use of the product loss of time inconvenience commercial loss or consequential damages is not covered The consumer is responsible for installation reinstallation labor charges of the product Air Lift Company reserves the right to change the design of any product without assuming any obligation to modify any product previously manufactured This warranty gives you specific legal rights and you may also have other rights that vary from state to state Some states do not allow limitations on how long an implied warranty lasts or allow the exclusion or limitation of incidental or consequential damages The above limitation or exclusion may not apply to you There are no warranties expressed or implied including any implied warranties of merchantability and fitness which extend beyond this warranty period There are no warranties that extend beyond the description on the face hereof Seller disclaims the implied warranty of merchantability Dated proof of purchase required MN 553 LoadLifter 5000 e Warranty and Returns Policy continued Air Lift 1000 Lifetime Limited Load Controller I 2 Year Limited RideControl Lifetime Limited Load Controller Il 2 Year Limited SlamAir Lifetime Limited SmartAir 2
19. is not level fig 15 Raise the air pressure to correct either of these problems and level the vehicle Ride comfort If the vehicle has a rough and harsh ride it may be due to either too much pressure or not enough fig 16 Try different pressures to determine the best ride comfort Stability Stability translates into safety and should be the priority meaning the driver may need to sacrifice a perfectly level and comfortable ride Stability issues include roll control bounce dive during braking and sponginess fig 17 Tuning out these problems usually requires an increase in pressure ER p p AE J 7 BIN 7 a a g Bad headlight aim fig 15 Jen I7 Sway and body roll 13 R LoadLifter 5000 GUIDELINES FOR ADDING AIR 1 Start with the vehicle level or slightly above 2 When in doubt always add air 3 For motorhomes start with 50 100 PSI in the rear because it can be safely assumed that it is heavily loaded 4 If the front of the vehicle dives while braking increase the pressure in the front air bags if equipped If it is ever suspected that the air bags have bottomed out increase the pressure fig 18 Adjust the pressure up and down to find the best ride If the vehicle rocks and rolls adjust the air pressure to reduce movement o no 0 It may be necessary to maintain different pressures on each side of the vehicle Loads such as water fuel and applian
20. rmly on the air line Trim 1 off the end of the air line Be sure the cut is clean and square see fig 12 Reinsert the air line into the push to connect fitting b Check the threaded connection by tightening the swivel fitting another turn If it still leaks deflate the air spring remove the fitting and re coat the threads with thread sealant Reinstall by hand tightening as much as possible then use a wrench for an additional two turns If there is a problem with the inflation valve then a Check the valve core by tightening it with a valve core tool b Check the air line connection by removing the air line from the barbed type fitting DO NOT CUT THE AIR LINE COMPLETELY OFF AS THIS WILL NICK THE BARB AND RENDER THE FITTING USELESS 3 If the preceding steps have not resolved the problem call Air Lift customer service at 800 248 0892 for assistance MN 553 LoadLifter 5000 a Before Operating MN 553 Technician s Signature INSTALLATION CHECKLIST QO Clearance test Inflate the air springs to 60 PSI and make sure there is at least Y clearance from anything that might rub against each sleeve Be sure to check the tire brake drum frame shock absorbers and brake cables QO Leak test before road test Inflate the air springs to 30 PSI and check all connections for leaks Refer to Checking for Leaks on page 10 All leaks must be eliminated before the vehicle is road tested Heat te
21. soap water solution 1 Crescent wrench seesseeeeeeeeeeeeeeseieeeerreeeneneene 1 Installing the LoadLifter 5000 System GETTING STARTED Your vehicle may be equipped with a rear brake proportioning valve Any type of load assist product could affect brake performance We recommend that you check with your dealer before installing this type of product If your vehicle DOES NOT have a rear brake proportioning valve or is equipped with an anti lock type brake system installation of a load assist product will have NO EFFECT on brake performance COMPRESSED AIR CAN CAUSE INJURY AND DAMAGE TO THE VEHICLE AND PARTS IF IT IS NOT HANDLED PROPERLY FOR YOUR SAFETY DO NOT TRY TO INFLATE THE AIR SPRINGS UNTIL THEY HAVE BEEN PROPERLY SECURED TO THE VEHICLE ASSEMBLING THE AIR SPRING ASSEMBLY 1 Set a roll plate D on both ends of the air spring A The radiused rounded edge of the roll plate will be towards the air spring enabling the air spring to be seated in both roll plates fig 2 2 Install a 90 elbow fitting E to the top of the air spring Tighten finger tight plus 1 and Y turns Be careful to only tighten on the metal hex nut Do not over tighten fig 2 MN 553 LoadLifter 5000 LF 3 Install the upper bracket B onto the bellow assembly Use slot A when installing on the driver s side and use slot B when installing on the passenger s side Attach using two 3 8 bolts G lock washers K and
22. st Be sure there is sufficient clearance from heat sources at least 6 for air springs and air lines If a heat shield was included in the kit install it If there is no heat shield but one is required call Air Lift customer service at 800 248 0892 U Fastener test Recheck all bolts for proper torque Q Road test The vehicle should be road tested after the preceding tests Inflate the springs to 25 PSI 50 PSI if the vehicle is loaded Drive the vehicle 10 miles and recheck for clearance loose fasteners and air leaks UA Operating instructions If professionally installed the installer should review the operating instructions with the owner Be sure to provide the owner with all of the paperwork that came with the kit Date POST INSTALLATION CHECKLIST U Overnight leak down test Recheck air pressure after the vehicle has been used for 24 hours If the pressure has dropped more than 5 PSI then there is a leak that must be fixed Either fix the leak yourself or return to the installer for service O Air pressure requirements understand the air pressure requirements of my air spring System Regardless of load the air pressure should always be adjusted to maintain ride height at all times LJ Thirty day or 500 mile test understand that must recheck the air spring system after 30 days or 500 miles whichever comes first If any part shows signs of rubbing or abrasion the source should
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